./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI --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 a782d0524cc0b0b5c0b646ffcbe2ffba4b8b0177 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:28:30,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:28:30,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:28:30,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:28:30,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:28:30,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:28:30,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:28:30,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:28:30,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:28:30,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:28:30,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:28:30,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:28:30,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:28:30,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:28:30,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:28:30,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:28:30,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:28:30,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:28:30,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:28:30,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:28:30,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:28:30,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:28:30,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:28:30,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:28:30,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:28:30,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:28:30,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:28:30,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:28:30,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:28:30,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:28:30,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:28:30,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:28:30,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:28:30,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:28:30,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:28:30,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:28:30,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:28:30,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:28:30,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:28:30,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:28:30,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:28:30,607 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:28:30,649 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:28:30,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:28:30,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:28:30,652 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:28:30,652 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:28:30,652 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:28:30,652 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:28:30,653 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:28:30,659 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:28:30,659 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:28:30,660 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:28:30,661 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:28:30,661 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:28:30,661 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:28:30,662 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:28:30,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:28:30,663 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:28:30,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:28:30,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:28:30,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:28:30,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:28:30,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:28:30,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:28:30,664 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:28:30,665 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:28:30,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:28:30,665 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:28:30,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:28:30,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:28:30,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:28:30,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:28:30,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:28:30,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:28:30,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:28:30,668 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:28:30,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:28:30,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:28:30,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:28:30,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:28:30,669 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_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a782d0524cc0b0b5c0b646ffcbe2ffba4b8b0177 [2021-10-11 02:28:30,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:28:30,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:28:30,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:28:30,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:28:30,965 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:28:30,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/eca-rers2012/Problem01_label04.c [2021-10-11 02:28:31,031 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/data/2688462d0/f91b482ee2a041e490b0851a68a4d13c/FLAG6b82a2b37 [2021-10-11 02:28:31,608 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:28:31,609 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/sv-benchmarks/c/eca-rers2012/Problem01_label04.c [2021-10-11 02:28:31,635 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/data/2688462d0/f91b482ee2a041e490b0851a68a4d13c/FLAG6b82a2b37 [2021-10-11 02:28:31,848 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/data/2688462d0/f91b482ee2a041e490b0851a68a4d13c [2021-10-11 02:28:31,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:28:31,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:28:31,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:31,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:28:31,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:28:31,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c08577a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:31, skipping insertion in model container [2021-10-11 02:28:31,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:31" (1/1) ... [2021-10-11 02:28:31,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:28:31,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:28:32,276 WARN L226 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_cfbe14cf-b2f4-4650-bbe6-761245843d77/sv-benchmarks/c/eca-rers2012/Problem01_label04.c[17486,17499] [2021-10-11 02:28:32,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:32,364 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:28:32,445 WARN L226 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_cfbe14cf-b2f4-4650-bbe6-761245843d77/sv-benchmarks/c/eca-rers2012/Problem01_label04.c[17486,17499] [2021-10-11 02:28:32,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:32,481 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:28:32,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32 WrapperNode [2021-10-11 02:28:32,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:32,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:32,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:28:32,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:28:32,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:32,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:28:32,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:28:32,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:28:32,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (1/1) ... [2021-10-11 02:28:32,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:28:32,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:28:32,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:28:32,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:28:32,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:28:32,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:28:32,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:28:32,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:28:32,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:28:34,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:28:34,779 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:28:34,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:34 BoogieIcfgContainer [2021-10-11 02:28:34,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:28:34,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:28:34,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:28:34,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:28:34,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:28:31" (1/3) ... [2021-10-11 02:28:34,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50470dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:34, skipping insertion in model container [2021-10-11 02:28:34,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:32" (2/3) ... [2021-10-11 02:28:34,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50470dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:34, skipping insertion in model container [2021-10-11 02:28:34,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:34" (3/3) ... [2021-10-11 02:28:34,793 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label04.c [2021-10-11 02:28:34,812 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:28:34,815 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:28:34,826 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:28:34,865 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:28:34,865 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:28:34,866 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:28:34,866 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:28:34,866 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:28:34,866 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:28:34,866 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:28:34,866 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:28:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-10-11 02:28:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-11 02:28:34,893 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:34,894 INFO L422 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] [2021-10-11 02:28:34,895 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:34,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1806913112, now seen corresponding path program 1 times [2021-10-11 02:28:34,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:34,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008110932] [2021-10-11 02:28:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:35,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008110932] [2021-10-11 02:28:35,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:35,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:28:35,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611003719] [2021-10-11 02:28:35,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:35,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:35,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:35,287 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2021-10-11 02:28:35,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:35,755 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-11 02:28:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:35,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2021-10-11 02:28:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:35,783 INFO L225 Difference]: With dead ends: 224 [2021-10-11 02:28:35,785 INFO L226 Difference]: Without dead ends: 145 [2021-10-11 02:28:35,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-11 02:28:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-11 02:28:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-10-11 02:28:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-11 02:28:35,868 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-11 02:28:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:35,870 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-11 02:28:35,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-11 02:28:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-11 02:28:35,876 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:35,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:35,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:28:35,877 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1034857605, now seen corresponding path program 1 times [2021-10-11 02:28:35,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:35,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249339456] [2021-10-11 02:28:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:36,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249339456] [2021-10-11 02:28:36,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:36,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:28:36,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061293730] [2021-10-11 02:28:36,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:36,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:36,012 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2021-10-11 02:28:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:36,447 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-11 02:28:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:36,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2021-10-11 02:28:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:36,451 INFO L225 Difference]: With dead ends: 431 [2021-10-11 02:28:36,451 INFO L226 Difference]: Without dead ends: 287 [2021-10-11 02:28:36,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:36,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-11 02:28:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-11 02:28:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-10-11 02:28:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2021-10-11 02:28:36,472 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2021-10-11 02:28:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:36,472 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2021-10-11 02:28:36,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2021-10-11 02:28:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-11 02:28:36,476 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:36,476 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:36,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:28:36,477 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:36,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1703778247, now seen corresponding path program 1 times [2021-10-11 02:28:36,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:36,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603330465] [2021-10-11 02:28:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:28:36,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603330465] [2021-10-11 02:28:36,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:36,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:28:36,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479806393] [2021-10-11 02:28:36,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:36,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:36,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:36,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:36,649 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 3 states. [2021-10-11 02:28:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:37,146 INFO L93 Difference]: Finished difference Result 857 states and 1401 transitions. [2021-10-11 02:28:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:37,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2021-10-11 02:28:37,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:37,154 INFO L225 Difference]: With dead ends: 857 [2021-10-11 02:28:37,154 INFO L226 Difference]: Without dead ends: 571 [2021-10-11 02:28:37,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-10-11 02:28:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-10-11 02:28:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2021-10-11 02:28:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 884 transitions. [2021-10-11 02:28:37,190 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 884 transitions. Word has length 78 [2021-10-11 02:28:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:37,191 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 884 transitions. [2021-10-11 02:28:37,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 884 transitions. [2021-10-11 02:28:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-11 02:28:37,197 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:37,198 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:37,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:28:37,198 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:37,199 INFO L82 PathProgramCache]: Analyzing trace with hash 289049227, now seen corresponding path program 1 times [2021-10-11 02:28:37,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:37,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153392187] [2021-10-11 02:28:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-11 02:28:37,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153392187] [2021-10-11 02:28:37,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:37,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:28:37,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745151403] [2021-10-11 02:28:37,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:37,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:37,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:37,254 INFO L87 Difference]: Start difference. First operand 571 states and 884 transitions. Second operand 3 states. [2021-10-11 02:28:37,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:37,732 INFO L93 Difference]: Finished difference Result 1567 states and 2441 transitions. [2021-10-11 02:28:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:37,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2021-10-11 02:28:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:37,739 INFO L225 Difference]: With dead ends: 1567 [2021-10-11 02:28:37,739 INFO L226 Difference]: Without dead ends: 997 [2021-10-11 02:28:37,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-11 02:28:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 713. [2021-10-11 02:28:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2021-10-11 02:28:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1045 transitions. [2021-10-11 02:28:37,774 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1045 transitions. Word has length 91 [2021-10-11 02:28:37,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:37,774 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1045 transitions. [2021-10-11 02:28:37,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:37,775 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1045 transitions. [2021-10-11 02:28:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-11 02:28:37,780 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:37,781 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:37,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:28:37,781 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:37,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:37,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1324171411, now seen corresponding path program 1 times [2021-10-11 02:28:37,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:37,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247435631] [2021-10-11 02:28:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:37,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247435631] [2021-10-11 02:28:37,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:37,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:28:37,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132002518] [2021-10-11 02:28:37,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:37,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:37,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:37,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:37,858 INFO L87 Difference]: Start difference. First operand 713 states and 1045 transitions. Second operand 3 states. [2021-10-11 02:28:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:38,311 INFO L93 Difference]: Finished difference Result 2135 states and 3132 transitions. [2021-10-11 02:28:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:38,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2021-10-11 02:28:38,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:38,320 INFO L225 Difference]: With dead ends: 2135 [2021-10-11 02:28:38,320 INFO L226 Difference]: Without dead ends: 1423 [2021-10-11 02:28:38,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-10-11 02:28:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1210. [2021-10-11 02:28:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:28:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1704 transitions. [2021-10-11 02:28:38,357 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1704 transitions. Word has length 94 [2021-10-11 02:28:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:38,357 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1704 transitions. [2021-10-11 02:28:38,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:38,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1704 transitions. [2021-10-11 02:28:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-11 02:28:38,361 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:38,361 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:38,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:28:38,361 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:38,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:38,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1729122794, now seen corresponding path program 1 times [2021-10-11 02:28:38,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:38,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491714803] [2021-10-11 02:28:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:38,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491714803] [2021-10-11 02:28:38,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:38,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:28:38,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337130916] [2021-10-11 02:28:38,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:28:38,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:38,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:28:38,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:28:38,439 INFO L87 Difference]: Start difference. First operand 1210 states and 1704 transitions. Second operand 4 states. [2021-10-11 02:28:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:39,054 INFO L93 Difference]: Finished difference Result 2632 states and 3644 transitions. [2021-10-11 02:28:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:28:39,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-10-11 02:28:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:39,067 INFO L225 Difference]: With dead ends: 2632 [2021-10-11 02:28:39,067 INFO L226 Difference]: Without dead ends: 1494 [2021-10-11 02:28:39,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:28:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-10-11 02:28:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1281. [2021-10-11 02:28:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2021-10-11 02:28:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1769 transitions. [2021-10-11 02:28:39,105 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1769 transitions. Word has length 97 [2021-10-11 02:28:39,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:39,107 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1769 transitions. [2021-10-11 02:28:39,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:28:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1769 transitions. [2021-10-11 02:28:39,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-11 02:28:39,111 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:39,112 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:39,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:28:39,112 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:39,113 INFO L82 PathProgramCache]: Analyzing trace with hash -720011127, now seen corresponding path program 1 times [2021-10-11 02:28:39,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:39,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110601931] [2021-10-11 02:28:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 02:28:39,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110601931] [2021-10-11 02:28:39,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:39,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:28:39,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697716211] [2021-10-11 02:28:39,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:39,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:39,209 INFO L87 Difference]: Start difference. First operand 1281 states and 1769 transitions. Second operand 3 states. [2021-10-11 02:28:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:39,606 INFO L93 Difference]: Finished difference Result 2632 states and 3608 transitions. [2021-10-11 02:28:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:39,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2021-10-11 02:28:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:39,614 INFO L225 Difference]: With dead ends: 2632 [2021-10-11 02:28:39,614 INFO L226 Difference]: Without dead ends: 1281 [2021-10-11 02:28:39,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:39,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-10-11 02:28:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-10-11 02:28:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2021-10-11 02:28:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1556 transitions. [2021-10-11 02:28:39,666 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1556 transitions. Word has length 98 [2021-10-11 02:28:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:39,666 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1556 transitions. [2021-10-11 02:28:39,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1556 transitions. [2021-10-11 02:28:39,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-11 02:28:39,670 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:39,670 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:39,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:28:39,671 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:39,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1815695407, now seen corresponding path program 1 times [2021-10-11 02:28:39,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:39,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913896704] [2021-10-11 02:28:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-11 02:28:39,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913896704] [2021-10-11 02:28:39,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:39,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:28:39,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523416101] [2021-10-11 02:28:39,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:39,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:39,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:39,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:39,727 INFO L87 Difference]: Start difference. First operand 1281 states and 1556 transitions. Second operand 3 states. [2021-10-11 02:28:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:40,035 INFO L93 Difference]: Finished difference Result 2490 states and 3033 transitions. [2021-10-11 02:28:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:40,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2021-10-11 02:28:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:40,043 INFO L225 Difference]: With dead ends: 2490 [2021-10-11 02:28:40,044 INFO L226 Difference]: Without dead ends: 1281 [2021-10-11 02:28:40,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-10-11 02:28:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-10-11 02:28:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2021-10-11 02:28:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1513 transitions. [2021-10-11 02:28:40,075 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1513 transitions. Word has length 102 [2021-10-11 02:28:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:40,076 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1513 transitions. [2021-10-11 02:28:40,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:40,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1513 transitions. [2021-10-11 02:28:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-11 02:28:40,079 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:40,079 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:40,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:28:40,079 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:40,080 INFO L82 PathProgramCache]: Analyzing trace with hash -785768395, now seen corresponding path program 1 times [2021-10-11 02:28:40,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:40,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793619797] [2021-10-11 02:28:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-11 02:28:40,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793619797] [2021-10-11 02:28:40,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:40,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:28:40,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574087627] [2021-10-11 02:28:40,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:40,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:40,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:40,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:40,125 INFO L87 Difference]: Start difference. First operand 1281 states and 1513 transitions. Second operand 3 states. [2021-10-11 02:28:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:40,506 INFO L93 Difference]: Finished difference Result 2916 states and 3483 transitions. [2021-10-11 02:28:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:40,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2021-10-11 02:28:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:40,516 INFO L225 Difference]: With dead ends: 2916 [2021-10-11 02:28:40,516 INFO L226 Difference]: Without dead ends: 1707 [2021-10-11 02:28:40,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-11 02:28:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1636. [2021-10-11 02:28:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2021-10-11 02:28:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1964 transitions. [2021-10-11 02:28:40,556 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1964 transitions. Word has length 111 [2021-10-11 02:28:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:40,557 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1964 transitions. [2021-10-11 02:28:40,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1964 transitions. [2021-10-11 02:28:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-11 02:28:40,561 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:40,561 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:40,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:28:40,561 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:40,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:40,562 INFO L82 PathProgramCache]: Analyzing trace with hash 32930574, now seen corresponding path program 1 times [2021-10-11 02:28:40,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:40,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293708462] [2021-10-11 02:28:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-11 02:28:40,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293708462] [2021-10-11 02:28:40,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:40,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:28:40,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056916462] [2021-10-11 02:28:40,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:40,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:40,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:40,629 INFO L87 Difference]: Start difference. First operand 1636 states and 1964 transitions. Second operand 3 states. [2021-10-11 02:28:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:40,961 INFO L93 Difference]: Finished difference Result 3271 states and 3929 transitions. [2021-10-11 02:28:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:40,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2021-10-11 02:28:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:40,970 INFO L225 Difference]: With dead ends: 3271 [2021-10-11 02:28:40,971 INFO L226 Difference]: Without dead ends: 1707 [2021-10-11 02:28:40,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:28:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-11 02:28:41,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1636. [2021-10-11 02:28:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2021-10-11 02:28:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1954 transitions. [2021-10-11 02:28:41,010 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1954 transitions. Word has length 130 [2021-10-11 02:28:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:41,010 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1954 transitions. [2021-10-11 02:28:41,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:41,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1954 transitions. [2021-10-11 02:28:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-10-11 02:28:41,014 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:41,015 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 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] [2021-10-11 02:28:41,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:28:41,015 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1713658810, now seen corresponding path program 1 times [2021-10-11 02:28:41,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:41,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146558816] [2021-10-11 02:28:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-10-11 02:28:41,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146558816] [2021-10-11 02:28:41,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:41,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:28:41,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060088661] [2021-10-11 02:28:41,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:28:41,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:41,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:28:41,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:28:41,102 INFO L87 Difference]: Start difference. First operand 1636 states and 1954 transitions. Second operand 4 states. [2021-10-11 02:28:41,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:41,574 INFO L93 Difference]: Finished difference Result 3342 states and 3999 transitions. [2021-10-11 02:28:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:28:41,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2021-10-11 02:28:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:41,582 INFO L225 Difference]: With dead ends: 3342 [2021-10-11 02:28:41,582 INFO L226 Difference]: Without dead ends: 1778 [2021-10-11 02:28:41,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:28:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2021-10-11 02:28:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1636. [2021-10-11 02:28:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2021-10-11 02:28:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1934 transitions. [2021-10-11 02:28:41,625 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1934 transitions. Word has length 146 [2021-10-11 02:28:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:41,625 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1934 transitions. [2021-10-11 02:28:41,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:28:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1934 transitions. [2021-10-11 02:28:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-10-11 02:28:41,658 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:41,658 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:41,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-11 02:28:41,658 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:41,659 INFO L82 PathProgramCache]: Analyzing trace with hash -798086645, now seen corresponding path program 1 times [2021-10-11 02:28:41,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:41,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171319499] [2021-10-11 02:28:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 125 proven. 11 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-11 02:28:41,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171319499] [2021-10-11 02:28:41,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361138928] [2021-10-11 02:28:41,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:41,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:28:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-10-11 02:28:42,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-10-11 02:28:42,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:28:42,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-11 02:28:42,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272006267] [2021-10-11 02:28:42,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:28:42,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:42,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:28:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:28:42,527 INFO L87 Difference]: Start difference. First operand 1636 states and 1934 transitions. Second operand 4 states. [2021-10-11 02:28:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:43,038 INFO L93 Difference]: Finished difference Result 3626 states and 4331 transitions. [2021-10-11 02:28:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:28:43,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2021-10-11 02:28:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:43,048 INFO L225 Difference]: With dead ends: 3626 [2021-10-11 02:28:43,049 INFO L226 Difference]: Without dead ends: 2062 [2021-10-11 02:28:43,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:28:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-10-11 02:28:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1565. [2021-10-11 02:28:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2021-10-11 02:28:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1810 transitions. [2021-10-11 02:28:43,123 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1810 transitions. Word has length 163 [2021-10-11 02:28:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:43,124 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1810 transitions. [2021-10-11 02:28:43,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:28:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1810 transitions. [2021-10-11 02:28:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-10-11 02:28:43,130 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:43,130 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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, 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] [2021-10-11 02:28:43,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-11 02:28:43,345 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:43,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1852258601, now seen corresponding path program 1 times [2021-10-11 02:28:43,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:43,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802534832] [2021-10-11 02:28:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 158 proven. 11 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-11 02:28:43,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802534832] [2021-10-11 02:28:43,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214076756] [2021-10-11 02:28:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:43,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:28:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:28:43,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:28:44,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:28:44,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-11 02:28:44,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78057382] [2021-10-11 02:28:44,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:28:44,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:44,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:28:44,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:28:44,174 INFO L87 Difference]: Start difference. First operand 1565 states and 1810 transitions. Second operand 3 states. [2021-10-11 02:28:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:44,497 INFO L93 Difference]: Finished difference Result 1780 states and 2069 transitions. [2021-10-11 02:28:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:28:44,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2021-10-11 02:28:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:44,506 INFO L225 Difference]: With dead ends: 1780 [2021-10-11 02:28:44,506 INFO L226 Difference]: Without dead ends: 1778 [2021-10-11 02:28:44,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:28:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2021-10-11 02:28:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1707. [2021-10-11 02:28:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2021-10-11 02:28:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 1987 transitions. [2021-10-11 02:28:44,547 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 1987 transitions. Word has length 196 [2021-10-11 02:28:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:44,547 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 1987 transitions. [2021-10-11 02:28:44,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:28:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 1987 transitions. [2021-10-11 02:28:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-10-11 02:28:44,553 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:44,554 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 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] [2021-10-11 02:28:44,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-11 02:28:44,769 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1404089786, now seen corresponding path program 1 times [2021-10-11 02:28:44,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:44,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594141153] [2021-10-11 02:28:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 189 proven. 11 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-10-11 02:28:44,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594141153] [2021-10-11 02:28:44,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637791726] [2021-10-11 02:28:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:45,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:28:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-10-11 02:28:45,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-10-11 02:28:45,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:28:45,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-11 02:28:45,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122665826] [2021-10-11 02:28:45,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:28:45,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:45,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:28:45,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:28:45,747 INFO L87 Difference]: Start difference. First operand 1707 states and 1987 transitions. Second operand 4 states. [2021-10-11 02:28:46,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:46,274 INFO L93 Difference]: Finished difference Result 3340 states and 3886 transitions. [2021-10-11 02:28:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:28:46,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2021-10-11 02:28:46,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:46,275 INFO L225 Difference]: With dead ends: 3340 [2021-10-11 02:28:46,276 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:28:46,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:28:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:28:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:28:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:28:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:28:46,280 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 221 [2021-10-11 02:28:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:46,280 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:28:46,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:28:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:28:46,280 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:28:46,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-11 02:28:46,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:28:46,628 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 50 [2021-10-11 02:28:46,931 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-10-11 02:28:47,184 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-10-11 02:28:47,187 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-11 02:28:47,187 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-11 02:28:47,187 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-11 02:28:47,188 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-11 02:28:47,188 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-11 02:28:47,188 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-11 02:28:47,188 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-11 02:28:47,188 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-11 02:28:47,188 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-11 02:28:47,188 INFO L262 CegarLoopResult]: For program point L470-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:28:47,189 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-11 02:28:47,189 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-11 02:28:47,189 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-11 02:28:47,189 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-11 02:28:47,189 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-11 02:28:47,189 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-11 02:28:47,189 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-11 02:28:47,190 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-11 02:28:47,190 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-11 02:28:47,190 INFO L262 CegarLoopResult]: For program point L473-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:28:47,190 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-11 02:28:47,190 INFO L262 CegarLoopResult]: For program point L474(line 474) no Hoare annotation was computed. [2021-10-11 02:28:47,190 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-11 02:28:47,190 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-11 02:28:47,191 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-11 02:28:47,191 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-11 02:28:47,191 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-11 02:28:47,191 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-11 02:28:47,191 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-11 02:28:47,191 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-11 02:28:47,191 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-11 02:28:47,192 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-11 02:28:47,192 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-11 02:28:47,192 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-11 02:28:47,192 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-11 02:28:47,192 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-11 02:28:47,192 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-11 02:28:47,192 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-11 02:28:47,193 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-11 02:28:47,193 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:28:47,193 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-11 02:28:47,193 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-11 02:28:47,193 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-11 02:28:47,194 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse2 (<= ~a8~0 13)) (.cse0 (<= ~a16~0 4)) (.cse7 (= ~a20~0 1)) (.cse11 (= ~a17~0 1))) (let ((.cse5 (<= 15 ~a8~0)) (.cse4 (= ~a21~0 1)) (.cse6 (let ((.cse12 (<= ~a7~0 0))) (or (and .cse12 .cse2) (and .cse0 .cse12 .cse7 .cse11)))) (.cse1 (<= ~a21~0 0)) (.cse9 (< 13 ~a8~0)) (.cse10 (<= ~a16~0 5)) (.cse3 (not .cse11)) (.cse8 (not .cse7))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse2) (and .cse4 .cse5) (and .cse4 .cse6 .cse7) (and .cse3 .cse8 .cse5) (and .cse0 .cse7 .cse2) (and .cse4 .cse9 .cse10 .cse7) (and .cse10 .cse3 .cse6 .cse8) (and .cse1 .cse7 .cse2) (and .cse9 .cse10 .cse3 .cse8)))) [2021-10-11 02:28:47,194 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-11 02:28:47,194 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-11 02:28:47,194 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-11 02:28:47,194 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-11 02:28:47,195 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-11 02:28:47,195 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-11 02:28:47,195 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-11 02:28:47,195 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:28:47,195 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-11 02:28:47,195 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-11 02:28:47,195 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-11 02:28:47,196 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-11 02:28:47,196 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-11 02:28:47,196 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-11 02:28:47,196 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-11 02:28:47,196 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-11 02:28:47,196 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-11 02:28:47,196 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-11 02:28:47,196 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-11 02:28:47,197 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-11 02:28:47,197 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-11 02:28:47,197 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-11 02:28:47,197 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-11 02:28:47,197 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse2 (<= ~a8~0 13)) (.cse0 (<= ~a16~0 4)) (.cse7 (= ~a20~0 1)) (.cse11 (= ~a17~0 1))) (let ((.cse5 (<= 15 ~a8~0)) (.cse4 (= ~a21~0 1)) (.cse6 (let ((.cse12 (<= ~a7~0 0))) (or (and .cse12 .cse2) (and .cse0 .cse12 .cse7 .cse11)))) (.cse1 (<= ~a21~0 0)) (.cse9 (< 13 ~a8~0)) (.cse10 (<= ~a16~0 5)) (.cse3 (not .cse11)) (.cse8 (not .cse7))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse2) (and .cse4 .cse5) (and .cse4 .cse6 .cse7) (and .cse3 .cse8 .cse5) (and .cse0 .cse7 .cse2) (and .cse4 .cse9 .cse10 .cse7) (and .cse10 .cse3 .cse6 .cse8) (and .cse1 .cse7 .cse2) (and .cse9 .cse10 .cse3 .cse8)))) [2021-10-11 02:28:47,198 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-11 02:28:47,198 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 474) no Hoare annotation was computed. [2021-10-11 02:28:47,198 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-11 02:28:47,198 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-11 02:28:47,198 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-11 02:28:47,198 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-11 02:28:47,198 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-11 02:28:47,199 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-11 02:28:47,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:28:47 BoogieIcfgContainer [2021-10-11 02:28:47,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:28:47,222 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:28:47,222 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:28:47,223 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:28:47,223 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:34" (3/4) ... [2021-10-11 02:28:47,227 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:28:47,250 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2021-10-11 02:28:47,252 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-10-11 02:28:47,254 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-11 02:28:47,256 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:28:47,381 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfbe14cf-b2f4-4650-bbe6-761245843d77/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:28:47,381 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:28:47,382 INFO L168 Benchmark]: Toolchain (without parser) took 15530.19 ms. Allocated memory was 98.6 MB in the beginning and 497.0 MB in the end (delta: 398.5 MB). Free memory was 57.5 MB in the beginning and 415.6 MB in the end (delta: -358.1 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:47,383 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory is still 75.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:28:47,383 INFO L168 Benchmark]: CACSL2BoogieTranslator took 628.86 ms. Allocated memory is still 98.6 MB. Free memory was 57.4 MB in the beginning and 57.3 MB in the end (delta: 86.4 kB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:47,384 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.79 ms. Allocated memory is still 98.6 MB. Free memory was 57.3 MB in the beginning and 51.4 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:47,384 INFO L168 Benchmark]: Boogie Preprocessor took 63.37 ms. Allocated memory is still 98.6 MB. Free memory was 51.0 MB in the beginning and 46.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:47,384 INFO L168 Benchmark]: RCFGBuilder took 2133.29 ms. Allocated memory was 98.6 MB in the beginning and 159.4 MB in the end (delta: 60.8 MB). Free memory was 46.8 MB in the beginning and 86.9 MB in the end (delta: -40.1 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:47,385 INFO L168 Benchmark]: TraceAbstraction took 12435.95 ms. Allocated memory was 159.4 MB in the beginning and 497.0 MB in the end (delta: 337.6 MB). Free memory was 86.9 MB in the beginning and 431.3 MB in the end (delta: -344.4 MB). Peak memory consumption was 170.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:47,385 INFO L168 Benchmark]: Witness Printer took 159.16 ms. Allocated memory is still 497.0 MB. Free memory was 431.3 MB in the beginning and 415.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:47,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory is still 75.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 628.86 ms. Allocated memory is still 98.6 MB. Free memory was 57.4 MB in the beginning and 57.3 MB in the end (delta: 86.4 kB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 102.79 ms. Allocated memory is still 98.6 MB. Free memory was 57.3 MB in the beginning and 51.4 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.37 ms. Allocated memory is still 98.6 MB. Free memory was 51.0 MB in the beginning and 46.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2133.29 ms. Allocated memory was 98.6 MB in the beginning and 159.4 MB in the end (delta: 60.8 MB). Free memory was 46.8 MB in the beginning and 86.9 MB in the end (delta: -40.1 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12435.95 ms. Allocated memory was 159.4 MB in the beginning and 497.0 MB in the end (delta: 337.6 MB). Free memory was 86.9 MB in the beginning and 431.3 MB in the end (delta: -344.4 MB). Peak memory consumption was 170.4 MB. Max. memory is 16.1 GB. * Witness Printer took 159.16 ms. Allocated memory is still 497.0 MB. Free memory was 431.3 MB in the beginning and 415.6 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: - PositiveResult [Line: 474]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 4 && a21 <= 0) && a8 <= 13) || ((a16 <= 4 && !(a17 == 1)) && a8 <= 13)) || (a21 == 1 && 15 <= a8)) || ((a21 == 1 && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && a20 == 1)) || ((!(a17 == 1) && !(a20 == 1)) && 15 <= a8)) || ((a16 <= 4 && a20 == 1) && a8 <= 13)) || (((a21 == 1 && 13 < a8) && a16 <= 5) && a20 == 1)) || (((a16 <= 5 && !(a17 == 1)) && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && !(a20 == 1))) || ((a21 <= 0 && a20 == 1) && a8 <= 13)) || (((13 < a8 && a16 <= 5) && !(a17 == 1)) && !(a20 == 1)) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 4 && a21 <= 0) && a8 <= 13) || ((a16 <= 4 && !(a17 == 1)) && a8 <= 13)) || (a21 == 1 && 15 <= a8)) || ((a21 == 1 && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && a20 == 1)) || ((!(a17 == 1) && !(a20 == 1)) && 15 <= a8)) || ((a16 <= 4 && a20 == 1) && a8 <= 13)) || (((a21 == 1 && 13 < a8) && a16 <= 5) && a20 == 1)) || (((a16 <= 5 && !(a17 == 1)) && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && !(a20 == 1))) || ((a21 <= 0 && a20 == 1) && a8 <= 13)) || (((13 < a8 && a16 <= 5) && !(a17 == 1)) && !(a20 == 1)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.6s, OverallIterations: 14, TraceHistogramMax: 7, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 700 SDtfs, 997 SDslu, 67 SDs, 0 SdLazy, 3275 SolverSat, 735 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1193 GetRequests, 1168 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1707occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 1562 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 57 NumberOfFragments, 301 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3710 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 180 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 2255 NumberOfCodeBlocks, 2255 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2815 ConstructedInterpolants, 0 QuantifiedInterpolants, 1015526 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1378 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 2813/2846 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...