./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label42.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_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/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_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/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_04e1b2dc-00db-4384-94f7-48c03a6391ef/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 ca099a0a865236295bec7881986648360a2333c3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 07:30:40,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:30:40,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:30:40,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:30:40,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:30:40,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:30:40,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:30:40,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:30:40,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:30:40,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:30:40,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:30:40,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:30:40,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:30:40,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:30:40,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:30:40,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:30:40,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:30:40,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:30:40,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:30:40,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:30:40,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:30:40,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:30:40,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:30:40,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:30:40,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:30:40,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:30:40,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:30:40,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:30:40,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:30:40,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:30:40,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:30:40,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:30:40,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:30:40,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:30:40,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:30:40,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:30:40,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:30:40,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:30:40,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:30:40,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:30:40,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:30:40,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:30:40,381 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:30:40,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:30:40,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:30:40,383 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:30:40,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:30:40,384 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:30:40,384 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:30:40,384 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:30:40,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:30:40,391 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:30:40,393 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:30:40,393 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:30:40,393 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:30:40,394 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:30:40,394 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:30:40,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:30:40,395 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:30:40,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:30:40,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:30:40,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:30:40,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:30:40,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:30:40,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:30:40,397 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:30:40,397 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:30:40,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:30:40,398 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:30:40,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:30:40,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:30:40,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:30:40,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:30:40,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:30:40,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:30:40,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:30:40,400 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:30:40,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:30:40,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:30:40,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:30:40,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:30:40,402 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_04e1b2dc-00db-4384-94f7-48c03a6391ef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca099a0a865236295bec7881986648360a2333c3 [2021-10-13 07:30:40,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:30:40,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:30:40,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:30:40,735 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:30:40,736 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:30:40,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c [2021-10-13 07:30:40,822 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/data/0a9b1a305/1964a5acf6944474935be257e8359681/FLAGf434321a1 [2021-10-13 07:30:41,487 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:30:41,489 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/sv-benchmarks/c/eca-rers2012/Problem01_label42.c [2021-10-13 07:30:41,510 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/data/0a9b1a305/1964a5acf6944474935be257e8359681/FLAGf434321a1 [2021-10-13 07:30:41,670 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/data/0a9b1a305/1964a5acf6944474935be257e8359681 [2021-10-13 07:30:41,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:30:41,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:30:41,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:30:41,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:30:41,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:30:41,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:30:41" (1/1) ... [2021-10-13 07:30:41,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7848370e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:41, skipping insertion in model container [2021-10-13 07:30:41,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:30:41" (1/1) ... [2021-10-13 07:30:41,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:30:41,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:30:42,118 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_04e1b2dc-00db-4384-94f7-48c03a6391ef/sv-benchmarks/c/eca-rers2012/Problem01_label42.c[19849,19862] [2021-10-13 07:30:42,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:30:42,155 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:30:42,310 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_04e1b2dc-00db-4384-94f7-48c03a6391ef/sv-benchmarks/c/eca-rers2012/Problem01_label42.c[19849,19862] [2021-10-13 07:30:42,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:30:42,342 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:30:42,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42 WrapperNode [2021-10-13 07:30:42,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:30:42,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:30:42,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:30:42,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:30:42,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (1/1) ... [2021-10-13 07:30:42,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (1/1) ... [2021-10-13 07:30:42,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:30:42,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:30:42,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:30:42,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:30:42,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (1/1) ... [2021-10-13 07:30:42,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (1/1) ... [2021-10-13 07:30:42,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (1/1) ... [2021-10-13 07:30:42,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (1/1) ... [2021-10-13 07:30:42,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (1/1) ... [2021-10-13 07:30:42,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (1/1) ... [2021-10-13 07:30:42,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (1/1) ... [2021-10-13 07:30:42,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:30:42,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:30:42,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:30:42,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:30:42,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (1/1) ... [2021-10-13 07:30:42,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:30:42,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:42,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:30:42,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:30:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:30:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:30:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:30:42,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:30:44,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:30:44,523 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:30:44,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:30:44 BoogieIcfgContainer [2021-10-13 07:30:44,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:30:44,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:30:44,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:30:44,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:30:44,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:30:41" (1/3) ... [2021-10-13 07:30:44,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36926c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:30:44, skipping insertion in model container [2021-10-13 07:30:44,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:30:42" (2/3) ... [2021-10-13 07:30:44,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36926c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:30:44, skipping insertion in model container [2021-10-13 07:30:44,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:30:44" (3/3) ... [2021-10-13 07:30:44,536 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label42.c [2021-10-13 07:30:44,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:30:44,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:30:44,614 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:30:44,623 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 07:30:44,623 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:30:44,651 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 07:30:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-13 07:30:44,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:44,665 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 07:30:44,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:44,672 INFO L82 PathProgramCache]: Analyzing trace with hash 379025799, now seen corresponding path program 1 times [2021-10-13 07:30:44,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:44,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733743632] [2021-10-13 07:30:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:44,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:45,091 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 07:30:45,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:45,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733743632] [2021-10-13 07:30:45,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733743632] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:45,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:45,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:30:45,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669926955] [2021-10-13 07:30:45,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:30:45,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:30:45,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:45,132 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 07:30:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:45,662 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-13 07:30:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:30:45,664 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 07:30:45,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:45,682 INFO L225 Difference]: With dead ends: 224 [2021-10-13 07:30:45,683 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 07:30:45,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 07:30:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-13 07:30:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7569444444444444) internal successors, (253), 144 states have internal predecessors, (253), 0 states have call successors, (0), 0 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 07:30:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 253 transitions. [2021-10-13 07:30:45,757 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 253 transitions. Word has length 71 [2021-10-13 07:30:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:45,759 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 253 transitions. [2021-10-13 07:30:45,760 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 07:30:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 253 transitions. [2021-10-13 07:30:45,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 07:30:45,766 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:45,767 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:45,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:30:45,767 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:45,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:45,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1189482561, now seen corresponding path program 1 times [2021-10-13 07:30:45,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:45,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679254391] [2021-10-13 07:30:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:45,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:30:45,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:45,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679254391] [2021-10-13 07:30:45,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679254391] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:45,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:45,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:30:45,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834054843] [2021-10-13 07:30:45,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:30:45,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:45,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:30:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:45,954 INFO L87 Difference]: Start difference. First operand 145 states and 253 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:46,346 INFO L93 Difference]: Finished difference Result 431 states and 756 transitions. [2021-10-13 07:30:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:30:46,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-13 07:30:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:46,351 INFO L225 Difference]: With dead ends: 431 [2021-10-13 07:30:46,351 INFO L226 Difference]: Without dead ends: 287 [2021-10-13 07:30:46,353 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 07:30:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-13 07:30:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-13 07:30:46,388 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 07:30:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2021-10-13 07:30:46,391 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 75 [2021-10-13 07:30:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:46,394 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2021-10-13 07:30:46,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2021-10-13 07:30:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-13 07:30:46,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:46,400 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 07:30:46,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:30:46,400 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1933825291, now seen corresponding path program 1 times [2021-10-13 07:30:46,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:46,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901304565] [2021-10-13 07:30:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:46,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:46,531 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 07:30:46,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:46,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901304565] [2021-10-13 07:30:46,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901304565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:46,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:46,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:30:46,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812451238] [2021-10-13 07:30:46,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:30:46,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:30:46,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:46,535 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 07:30:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:46,873 INFO L93 Difference]: Finished difference Result 715 states and 1184 transitions. [2021-10-13 07:30:46,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:30:46,874 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 07:30:46,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:46,877 INFO L225 Difference]: With dead ends: 715 [2021-10-13 07:30:46,878 INFO L226 Difference]: Without dead ends: 429 [2021-10-13 07:30:46,879 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 07:30:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-13 07:30:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2021-10-13 07:30:46,899 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 07:30:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 587 transitions. [2021-10-13 07:30:46,901 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 587 transitions. Word has length 105 [2021-10-13 07:30:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:46,901 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 587 transitions. [2021-10-13 07:30:46,902 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 07:30:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 587 transitions. [2021-10-13 07:30:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-13 07:30:46,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:46,912 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 07:30:46,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:30:46,913 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:46,914 INFO L82 PathProgramCache]: Analyzing trace with hash 218746303, now seen corresponding path program 1 times [2021-10-13 07:30:46,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:46,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981432922] [2021-10-13 07:30:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:46,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:47,036 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 07:30:47,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:47,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981432922] [2021-10-13 07:30:47,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981432922] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:47,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:47,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:30:47,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060481893] [2021-10-13 07:30:47,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:30:47,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:30:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:47,046 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 07:30:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:47,329 INFO L93 Difference]: Finished difference Result 715 states and 1173 transitions. [2021-10-13 07:30:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:30:47,330 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 07:30:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:47,333 INFO L225 Difference]: With dead ends: 715 [2021-10-13 07:30:47,333 INFO L226 Difference]: Without dead ends: 358 [2021-10-13 07:30:47,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-13 07:30:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-10-13 07:30:47,346 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 07:30:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 581 transitions. [2021-10-13 07:30:47,347 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 581 transitions. Word has length 109 [2021-10-13 07:30:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:47,348 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 581 transitions. [2021-10-13 07:30:47,348 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 07:30:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 581 transitions. [2021-10-13 07:30:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-13 07:30:47,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:47,350 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 07:30:47,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:30:47,351 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash 674879991, now seen corresponding path program 1 times [2021-10-13 07:30:47,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:47,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906566612] [2021-10-13 07:30:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:47,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:47,399 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 07:30:47,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:47,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906566612] [2021-10-13 07:30:47,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906566612] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:47,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:47,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:30:47,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187381299] [2021-10-13 07:30:47,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:30:47,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:47,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:30:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:47,402 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 07:30:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:47,753 INFO L93 Difference]: Finished difference Result 857 states and 1369 transitions. [2021-10-13 07:30:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:30:47,754 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 07:30:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:47,758 INFO L225 Difference]: With dead ends: 857 [2021-10-13 07:30:47,758 INFO L226 Difference]: Without dead ends: 500 [2021-10-13 07:30:47,759 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 07:30:47,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-13 07:30:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-10-13 07:30:47,777 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 07:30:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2021-10-13 07:30:47,780 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 113 [2021-10-13 07:30:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:47,781 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2021-10-13 07:30:47,781 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 07:30:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2021-10-13 07:30:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-13 07:30:47,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:47,785 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 07:30:47,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:30:47,785 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:47,786 INFO L82 PathProgramCache]: Analyzing trace with hash -692381259, now seen corresponding path program 1 times [2021-10-13 07:30:47,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:47,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090093866] [2021-10-13 07:30:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:47,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:47,840 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 07:30:47,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:47,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090093866] [2021-10-13 07:30:47,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090093866] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:47,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:47,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:30:47,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659389982] [2021-10-13 07:30:47,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:30:47,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:47,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:30:47,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:47,844 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 07:30:48,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:48,288 INFO L93 Difference]: Finished difference Result 1354 states and 2016 transitions. [2021-10-13 07:30:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:30:48,294 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 07:30:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:48,301 INFO L225 Difference]: With dead ends: 1354 [2021-10-13 07:30:48,301 INFO L226 Difference]: Without dead ends: 855 [2021-10-13 07:30:48,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-13 07:30:48,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 642. [2021-10-13 07:30:48,332 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 07:30:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 949 transitions. [2021-10-13 07:30:48,336 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 949 transitions. Word has length 122 [2021-10-13 07:30:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:48,336 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 949 transitions. [2021-10-13 07:30:48,337 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 07:30:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 949 transitions. [2021-10-13 07:30:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-13 07:30:48,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:48,341 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 07:30:48,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:30:48,341 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:48,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash 240375227, now seen corresponding path program 1 times [2021-10-13 07:30:48,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:48,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680820153] [2021-10-13 07:30:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:48,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:48,412 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 07:30:48,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:48,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680820153] [2021-10-13 07:30:48,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680820153] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:48,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:48,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:30:48,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266673407] [2021-10-13 07:30:48,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:30:48,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:30:48,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:48,416 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 07:30:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:48,827 INFO L93 Difference]: Finished difference Result 1354 states and 2010 transitions. [2021-10-13 07:30:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:30:48,828 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 07:30:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:48,833 INFO L225 Difference]: With dead ends: 1354 [2021-10-13 07:30:48,833 INFO L226 Difference]: Without dead ends: 713 [2021-10-13 07:30:48,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:48,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-10-13 07:30:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-10-13 07:30:48,862 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 07:30:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1038 transitions. [2021-10-13 07:30:48,866 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1038 transitions. Word has length 138 [2021-10-13 07:30:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:48,866 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1038 transitions. [2021-10-13 07:30:48,867 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 07:30:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1038 transitions. [2021-10-13 07:30:48,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-13 07:30:48,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:48,871 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 07:30:48,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:30:48,873 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:48,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1229086309, now seen corresponding path program 1 times [2021-10-13 07:30:48,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:48,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796391927] [2021-10-13 07:30:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:48,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:49,000 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 07:30:49,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:49,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796391927] [2021-10-13 07:30:49,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796391927] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:49,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:49,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:30:49,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574653238] [2021-10-13 07:30:49,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:30:49,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:49,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:30:49,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:30:49,004 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 07:30:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:49,525 INFO L93 Difference]: Finished difference Result 1780 states and 2557 transitions. [2021-10-13 07:30:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:30:49,525 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 07:30:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:49,531 INFO L225 Difference]: With dead ends: 1780 [2021-10-13 07:30:49,532 INFO L226 Difference]: Without dead ends: 997 [2021-10-13 07:30:49,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:30:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-13 07:30:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2021-10-13 07:30:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.2432432432432432) internal successors, (1150), 925 states have internal predecessors, (1150), 0 states have call successors, (0), 0 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 07:30:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1150 transitions. [2021-10-13 07:30:49,563 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1150 transitions. Word has length 154 [2021-10-13 07:30:49,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:49,565 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1150 transitions. [2021-10-13 07:30:49,565 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 07:30:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1150 transitions. [2021-10-13 07:30:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-10-13 07:30:49,569 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:49,570 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, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:49,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 07:30:49,570 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:49,571 INFO L82 PathProgramCache]: Analyzing trace with hash -937096071, now seen corresponding path program 1 times [2021-10-13 07:30:49,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:49,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374505540] [2021-10-13 07:30:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:49,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 07:30:49,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:49,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374505540] [2021-10-13 07:30:49,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374505540] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:49,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:49,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:30:49,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662131799] [2021-10-13 07:30:49,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:30:49,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:49,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:30:49,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:30:49,690 INFO L87 Difference]: Start difference. First operand 926 states and 1150 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 07:30:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:50,163 INFO L93 Difference]: Finished difference Result 2064 states and 2553 transitions. [2021-10-13 07:30:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:30:50,164 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 177 [2021-10-13 07:30:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:50,171 INFO L225 Difference]: With dead ends: 2064 [2021-10-13 07:30:50,171 INFO L226 Difference]: Without dead ends: 1139 [2021-10-13 07:30:50,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:30:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-13 07:30:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 926. [2021-10-13 07:30:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.1978378378378378) internal successors, (1108), 925 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 07:30:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1108 transitions. [2021-10-13 07:30:50,201 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1108 transitions. Word has length 177 [2021-10-13 07:30:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:50,201 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1108 transitions. [2021-10-13 07:30:50,201 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 07:30:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1108 transitions. [2021-10-13 07:30:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-10-13 07:30:50,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:50,206 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 07:30:50,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 07:30:50,206 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:50,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:50,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1287881784, now seen corresponding path program 1 times [2021-10-13 07:30:50,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:50,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847575640] [2021-10-13 07:30:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:50,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:50,269 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 07:30:50,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:50,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847575640] [2021-10-13 07:30:50,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847575640] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:50,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:50,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:30:50,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764456059] [2021-10-13 07:30:50,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:30:50,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:50,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:30:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:30:50,272 INFO L87 Difference]: Start difference. First operand 926 states and 1108 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 07:30:50,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:50,701 INFO L93 Difference]: Finished difference Result 1922 states and 2305 transitions. [2021-10-13 07:30:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:30:50,702 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 07:30:50,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:50,708 INFO L225 Difference]: With dead ends: 1922 [2021-10-13 07:30:50,709 INFO L226 Difference]: Without dead ends: 997 [2021-10-13 07:30:50,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:30:50,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-13 07:30:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-13 07:30:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.180722891566265) internal successors, (1176), 996 states have internal predecessors, (1176), 0 states have call successors, (0), 0 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 07:30:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1176 transitions. [2021-10-13 07:30:50,747 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1176 transitions. Word has length 202 [2021-10-13 07:30:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:50,748 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1176 transitions. [2021-10-13 07:30:50,748 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 07:30:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1176 transitions. [2021-10-13 07:30:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-10-13 07:30:50,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:50,753 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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, 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] [2021-10-13 07:30:50,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 07:30:50,753 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:50,754 INFO L82 PathProgramCache]: Analyzing trace with hash 853603449, now seen corresponding path program 1 times [2021-10-13 07:30:50,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:50,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640177313] [2021-10-13 07:30:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:50,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-10-13 07:30:50,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:50,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640177313] [2021-10-13 07:30:50,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640177313] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:50,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:50,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:30:50,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913802261] [2021-10-13 07:30:50,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:30:50,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:30:50,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:50,899 INFO L87 Difference]: Start difference. First operand 997 states and 1176 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 07:30:51,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:51,208 INFO L93 Difference]: Finished difference Result 2206 states and 2605 transitions. [2021-10-13 07:30:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:30:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 220 [2021-10-13 07:30:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:51,216 INFO L225 Difference]: With dead ends: 2206 [2021-10-13 07:30:51,216 INFO L226 Difference]: Without dead ends: 1210 [2021-10-13 07:30:51,220 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 07:30:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-13 07:30:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2021-10-13 07:30:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.1687170474516695) internal successors, (1330), 1138 states have internal predecessors, (1330), 0 states have call successors, (0), 0 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 07:30:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1330 transitions. [2021-10-13 07:30:51,255 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1330 transitions. Word has length 220 [2021-10-13 07:30:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:51,256 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1330 transitions. [2021-10-13 07:30:51,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 07:30:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1330 transitions. [2021-10-13 07:30:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-13 07:30:51,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:51,262 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:30:51,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 07:30:51,263 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:51,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:51,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2121153410, now seen corresponding path program 1 times [2021-10-13 07:30:51,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:51,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269245945] [2021-10-13 07:30:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:51,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-10-13 07:30:51,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:51,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269245945] [2021-10-13 07:30:51,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269245945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:51,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:51,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:30:51,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521138524] [2021-10-13 07:30:51,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:30:51,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:51,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:30:51,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:30:51,436 INFO L87 Difference]: Start difference. First operand 1139 states and 1330 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:51,738 INFO L93 Difference]: Finished difference Result 2277 states and 2659 transitions. [2021-10-13 07:30:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:30:51,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-10-13 07:30:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:51,748 INFO L225 Difference]: With dead ends: 2277 [2021-10-13 07:30:51,748 INFO L226 Difference]: Without dead ends: 1139 [2021-10-13 07:30:51,750 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 07:30:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-13 07:30:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2021-10-13 07:30:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.148506151142355) internal successors, (1307), 1138 states have internal predecessors, (1307), 0 states have call successors, (0), 0 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 07:30:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1307 transitions. [2021-10-13 07:30:51,809 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1307 transitions. Word has length 242 [2021-10-13 07:30:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:51,810 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1307 transitions. [2021-10-13 07:30:51,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:30:51,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1307 transitions. [2021-10-13 07:30:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-10-13 07:30:51,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:30:51,815 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 07:30:51,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 07:30:51,816 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:30:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:30:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1886816047, now seen corresponding path program 1 times [2021-10-13 07:30:51,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:30:51,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39500825] [2021-10-13 07:30:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:51,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:30:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:52,083 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 07:30:52,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:30:52,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39500825] [2021-10-13 07:30:52,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39500825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:30:52,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218366818] [2021-10-13 07:30:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:52,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:52,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:52,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:30:52,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:30:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:30:52,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:53,079 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 07:30:53,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:53,756 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 07:30:53,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218366818] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:30:53,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:30:53,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-13 07:30:53,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730669479] [2021-10-13 07:30:53,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:30:53,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:30:53,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:30:53,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:30:53,762 INFO L87 Difference]: Start difference. First operand 1139 states and 1307 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 07:30:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:30:54,030 INFO L93 Difference]: Finished difference Result 1352 states and 1536 transitions. [2021-10-13 07:30:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:30:54,031 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 07:30:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:30:54,032 INFO L225 Difference]: With dead ends: 1352 [2021-10-13 07:30:54,032 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:30:54,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:30:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:30:54,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:30:54,034 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 07:30:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:30:54,035 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 255 [2021-10-13 07:30:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:30:54,035 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:30:54,036 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 07:30:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:30:54,036 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:30:54,039 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:30:54,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:54,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-13 07:30:54,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:30:54,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:30:54,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:30:54,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:30:54,475 INFO L857 garLoopResultBuilder]: For program point L531(line 531) no Hoare annotation was computed. [2021-10-13 07:30:54,475 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-13 07:30:54,475 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-13 07:30:54,475 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-13 07:30:54,476 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-13 07:30:54,476 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-13 07:30:54,476 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-13 07:30:54,476 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-13 07:30:54,476 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-13 07:30:54,476 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-13 07:30:54,476 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-13 07:30:54,477 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-13 07:30:54,477 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-13 07:30:54,477 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-13 07:30:54,477 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-13 07:30:54,477 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-13 07:30:54,477 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-13 07:30:54,477 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-13 07:30:54,478 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-13 07:30:54,478 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-13 07:30:54,478 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-13 07:30:54,478 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-13 07:30:54,478 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-13 07:30:54,478 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-13 07:30:54,478 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-13 07:30:54,479 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-13 07:30:54,479 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-13 07:30:54,479 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-13 07:30:54,479 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-13 07:30:54,479 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-13 07:30:54,479 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-13 07:30:54,479 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-13 07:30:54,480 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-13 07:30:54,480 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-13 07:30:54,480 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-13 07:30:54,480 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-13 07:30:54,480 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-13 07:30:54,480 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:30:54,480 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-13 07:30:54,480 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-13 07:30:54,481 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-13 07:30:54,481 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (= ~a21~0 1)) (.cse1 (<= ~a16~0 4)) (.cse3 (= ~a17~0 1)) (.cse2 (= ~a20~0 1))) (or (and (<= 14 ~a8~0) .cse0 (<= ~a16~0 5)) (and .cse1 .cse2) (and .cse0 (<= 15 ~a8~0)) (and .cse3 .cse1) (and .cse0 .cse1) (and (<= 6 ~a16~0) .cse2) (and .cse3 .cse2))) [2021-10-13 07:30:54,481 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-13 07:30:54,481 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-13 07:30:54,481 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-13 07:30:54,482 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-13 07:30:54,482 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-13 07:30:54,482 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-13 07:30:54,482 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-13 07:30:54,482 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:30:54,482 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-13 07:30:54,482 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-13 07:30:54,482 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-13 07:30:54,483 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-13 07:30:54,483 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-13 07:30:54,483 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-13 07:30:54,483 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-13 07:30:54,483 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-13 07:30:54,483 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-13 07:30:54,483 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-13 07:30:54,483 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-13 07:30:54,484 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-13 07:30:54,484 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-13 07:30:54,484 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-13 07:30:54,484 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-13 07:30:54,484 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (= ~a21~0 1)) (.cse1 (<= ~a16~0 4)) (.cse3 (= ~a17~0 1)) (.cse2 (= ~a20~0 1))) (or (and (<= 14 ~a8~0) .cse0 (<= ~a16~0 5)) (and .cse1 .cse2) (and .cse0 (<= 15 ~a8~0)) (and .cse3 .cse1) (and .cse0 .cse1) (and (<= 6 ~a16~0) .cse2) (and .cse3 .cse2))) [2021-10-13 07:30:54,484 INFO L857 garLoopResultBuilder]: For program point L527-1(lines 40 585) no Hoare annotation was computed. [2021-10-13 07:30:54,484 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-13 07:30:54,485 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 531) no Hoare annotation was computed. [2021-10-13 07:30:54,485 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-13 07:30:54,485 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-13 07:30:54,485 INFO L857 garLoopResultBuilder]: For program point L530-1(lines 40 585) no Hoare annotation was computed. [2021-10-13 07:30:54,485 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-13 07:30:54,485 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-13 07:30:54,485 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-13 07:30:54,486 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-13 07:30:54,491 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:30:54,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:30:54 BoogieIcfgContainer [2021-10-13 07:30:54,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:30:54,512 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:30:54,512 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:30:54,512 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:30:54,513 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:30:44" (3/4) ... [2021-10-13 07:30:54,516 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:30:54,542 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 108 nodes and edges [2021-10-13 07:30:54,544 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-13 07:30:54,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-13 07:30:54,548 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:30:54,665 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:30:54,666 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:30:54,667 INFO L168 Benchmark]: Toolchain (without parser) took 12987.88 ms. Allocated memory was 100.7 MB in the beginning and 216.0 MB in the end (delta: 115.3 MB). Free memory was 67.1 MB in the beginning and 67.9 MB in the end (delta: -818.0 kB). Peak memory consumption was 113.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:54,667 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory was 55.4 MB in the beginning and 55.4 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:30:54,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 660.85 ms. Allocated memory is still 100.7 MB. Free memory was 66.8 MB in the beginning and 60.6 MB in the end (delta: 6.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:54,668 INFO L168 Benchmark]: Boogie Procedure Inliner took 93.01 ms. Allocated memory is still 100.7 MB. Free memory was 60.6 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 07:30:54,669 INFO L168 Benchmark]: Boogie Preprocessor took 71.60 ms. Allocated memory is still 100.7 MB. Free memory was 54.9 MB in the beginning and 50.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:54,669 INFO L168 Benchmark]: RCFGBuilder took 2016.09 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 50.7 MB in the beginning and 82.8 MB in the end (delta: -32.1 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:54,669 INFO L168 Benchmark]: TraceAbstraction took 9983.18 ms. Allocated memory was 127.9 MB in the beginning and 216.0 MB in the end (delta: 88.1 MB). Free memory was 82.0 MB in the beginning and 83.6 MB in the end (delta: -1.6 MB). Peak memory consumption was 87.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:54,670 INFO L168 Benchmark]: Witness Printer took 153.78 ms. Allocated memory is still 216.0 MB. Free memory was 83.6 MB in the beginning and 67.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:54,672 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory was 55.4 MB in the beginning and 55.4 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 660.85 ms. Allocated memory is still 100.7 MB. Free memory was 66.8 MB in the beginning and 60.6 MB in the end (delta: 6.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 93.01 ms. Allocated memory is still 100.7 MB. Free memory was 60.6 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 71.60 ms. Allocated memory is still 100.7 MB. Free memory was 54.9 MB in the beginning and 50.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2016.09 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 50.7 MB in the beginning and 82.8 MB in the end (delta: -32.1 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9983.18 ms. Allocated memory was 127.9 MB in the beginning and 216.0 MB in the end (delta: 88.1 MB). Free memory was 82.0 MB in the beginning and 83.6 MB in the end (delta: -1.6 MB). Peak memory consumption was 87.1 MB. Max. memory is 16.1 GB. * Witness Printer took 153.78 ms. Allocated memory is still 216.0 MB. Free memory was 83.6 MB in the beginning and 67.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 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: 531]: 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: 9878.8ms, OverallIterations: 13, TraceHistogramMax: 7, EmptinessCheckTime: 71.7ms, AutomataDifference: 5221.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 234.0ms, InitialAbstractionConstructionTime: 22.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 573 SDtfs, 811 SDslu, 61 SDs, 0 SdLazy, 3133 SolverSat, 749 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3576.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 544 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1139occurred in iteration=11, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 398.4ms AutomataMinimizationTime, 13 MinimizatonAttempts, 639 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 107 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2562 FormulaSimplificationTreeSizeReduction, 59.6ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 82 FormulaSimplificationTreeSizeReductionInter, 164.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 193.6ms SsaConstructionTime, 505.0ms SatisfiabilityAnalysisTime, 2643.8ms InterpolantComputationTime, 2238 NumberOfCodeBlocks, 2238 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2478 ConstructedInterpolants, 0 QuantifiedInterpolants, 6208 SizeOfPredicates, 0 NumberOfNonLiveVariables, 501 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 15 InterpolantComputations, 14 PerfectInterpolantSequences, 2641/2744 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: (((((((14 <= a8 && a21 == 1) && a16 <= 5) || (a16 <= 4 && a20 == 1)) || (a21 == 1 && 15 <= a8)) || (a17 == 1 && a16 <= 4)) || (a21 == 1 && a16 <= 4)) || (6 <= a16 && a20 == 1)) || (a17 == 1 && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((14 <= a8 && a21 == 1) && a16 <= 5) || (a16 <= 4 && a20 == 1)) || (a21 == 1 && 15 <= a8)) || (a17 == 1 && a16 <= 4)) || (a21 == 1 && a16 <= 4)) || (6 <= a16 && a20 == 1)) || (a17 == 1 && a20 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-13 07:30:54,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e1b2dc-00db-4384-94f7-48c03a6391ef/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...