./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label29.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_c958145c-6c18-40da-a8c4-b1c9921cc5a7/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/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_c958145c-6c18-40da-a8c4-b1c9921cc5a7/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label29.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/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_c958145c-6c18-40da-a8c4-b1c9921cc5a7/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 4a846042d2e3a90f9afd312e363335049aaf47f7 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:29:07,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:07,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:07,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:07,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:07,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:07,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:07,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:07,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:07,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:07,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:07,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:07,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:07,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:07,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:07,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:07,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:07,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:07,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:07,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:07,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:07,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:07,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:07,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:07,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:07,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:07,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:07,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:07,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:07,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:07,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:07,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:07,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:07,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:07,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:07,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:07,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:07,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:07,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:07,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:07,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:07,178 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:29:07,225 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:07,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:07,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:07,228 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:07,229 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:07,229 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:07,229 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:29:07,229 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:07,236 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:07,237 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:29:07,238 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:29:07,238 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:07,239 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:29:07,239 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:29:07,239 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:29:07,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:07,240 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:29:07,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:29:07,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:29:07,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:07,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:07,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:07,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:07,242 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:29:07,242 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:29:07,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:07,243 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:07,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:07,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:07,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:07,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:07,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:07,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:07,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:07,247 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:29:07,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:29:07,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:07,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:07,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:07,248 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_c958145c-6c18-40da-a8c4-b1c9921cc5a7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a846042d2e3a90f9afd312e363335049aaf47f7 [2021-10-11 02:29:07,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:07,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:07,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:07,541 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:07,545 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:07,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/eca-rers2012/Problem01_label29.c [2021-10-11 02:29:07,654 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/bin/utaipan-WLngWcDbfI/data/18a16cd0b/fcbde7188b6f4d6599986d2136436709/FLAGc63deadf0 [2021-10-11 02:29:08,265 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:08,276 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/sv-benchmarks/c/eca-rers2012/Problem01_label29.c [2021-10-11 02:29:08,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/bin/utaipan-WLngWcDbfI/data/18a16cd0b/fcbde7188b6f4d6599986d2136436709/FLAGc63deadf0 [2021-10-11 02:29:08,477 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/bin/utaipan-WLngWcDbfI/data/18a16cd0b/fcbde7188b6f4d6599986d2136436709 [2021-10-11 02:29:08,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:08,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:08,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:08,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:08,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:08,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:08" (1/1) ... [2021-10-11 02:29:08,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7909123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:08, skipping insertion in model container [2021-10-11 02:29:08,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:08" (1/1) ... [2021-10-11 02:29:08,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:08,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:08,869 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_c958145c-6c18-40da-a8c4-b1c9921cc5a7/sv-benchmarks/c/eca-rers2012/Problem01_label29.c[18109,18122] [2021-10-11 02:29:08,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:08,914 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:09,052 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_c958145c-6c18-40da-a8c4-b1c9921cc5a7/sv-benchmarks/c/eca-rers2012/Problem01_label29.c[18109,18122] [2021-10-11 02:29:09,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:09,096 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:09,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09 WrapperNode [2021-10-11 02:29:09,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:09,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:09,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:09,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:09,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (1/1) ... [2021-10-11 02:29:09,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (1/1) ... [2021-10-11 02:29:09,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:09,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:09,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:09,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:09,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (1/1) ... [2021-10-11 02:29:09,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (1/1) ... [2021-10-11 02:29:09,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (1/1) ... [2021-10-11 02:29:09,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (1/1) ... [2021-10-11 02:29:09,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (1/1) ... [2021-10-11 02:29:09,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (1/1) ... [2021-10-11 02:29:09,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (1/1) ... [2021-10-11 02:29:09,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:09,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:09,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:09,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:09,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/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 02:29:09,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:29:09,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:09,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:09,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:11,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:11,449 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:29:11,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:11 BoogieIcfgContainer [2021-10-11 02:29:11,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:11,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:11,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:11,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:11,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:08" (1/3) ... [2021-10-11 02:29:11,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdebb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:11, skipping insertion in model container [2021-10-11 02:29:11,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:09" (2/3) ... [2021-10-11 02:29:11,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdebb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:11, skipping insertion in model container [2021-10-11 02:29:11,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:11" (3/3) ... [2021-10-11 02:29:11,468 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label29.c [2021-10-11 02:29:11,489 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:11,494 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:29:11,507 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:29:11,556 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:11,556 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:11,557 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:11,557 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:11,557 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:11,558 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:11,558 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:11,558 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-10-11 02:29:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-11 02:29:11,597 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:11,599 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 02:29:11,600 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:11,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1806911832, now seen corresponding path program 1 times [2021-10-11 02:29:11,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:11,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313768317] [2021-10-11 02:29:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:12,062 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 02:29:12,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313768317] [2021-10-11 02:29:12,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:12,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:12,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037124051] [2021-10-11 02:29:12,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:12,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:12,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:12,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:12,089 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2021-10-11 02:29:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:12,574 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-11 02:29:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:12,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2021-10-11 02:29:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:12,600 INFO L225 Difference]: With dead ends: 224 [2021-10-11 02:29:12,600 INFO L226 Difference]: Without dead ends: 145 [2021-10-11 02:29:12,614 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 02:29:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-11 02:29:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-11 02:29:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-10-11 02:29:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 265 transitions. [2021-10-11 02:29:12,704 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 265 transitions. Word has length 71 [2021-10-11 02:29:12,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:12,706 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 265 transitions. [2021-10-11 02:29:12,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 265 transitions. [2021-10-11 02:29:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-11 02:29:12,713 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:12,714 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 02:29:12,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:29:12,715 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1034856325, now seen corresponding path program 1 times [2021-10-11 02:29:12,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:12,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331685776] [2021-10-11 02:29:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:12,814 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 02:29:12,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331685776] [2021-10-11 02:29:12,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:12,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:12,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308994823] [2021-10-11 02:29:12,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:12,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:12,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:12,824 INFO L87 Difference]: Start difference. First operand 145 states and 265 transitions. Second operand 3 states. [2021-10-11 02:29:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:13,405 INFO L93 Difference]: Finished difference Result 431 states and 792 transitions. [2021-10-11 02:29:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:13,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2021-10-11 02:29:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:13,409 INFO L225 Difference]: With dead ends: 431 [2021-10-11 02:29:13,410 INFO L226 Difference]: Without dead ends: 287 [2021-10-11 02:29:13,412 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 02:29:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-11 02:29:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-11 02:29:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-10-11 02:29:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 485 transitions. [2021-10-11 02:29:13,434 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 485 transitions. Word has length 77 [2021-10-11 02:29:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:13,435 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 485 transitions. [2021-10-11 02:29:13,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 485 transitions. [2021-10-11 02:29:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-11 02:29:13,439 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:13,440 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:13,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:29:13,440 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:13,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1786342678, now seen corresponding path program 1 times [2021-10-11 02:29:13,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:13,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867899476] [2021-10-11 02:29:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:13,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867899476] [2021-10-11 02:29:13,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:13,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:13,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184277900] [2021-10-11 02:29:13,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:13,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:13,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:13,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:13,538 INFO L87 Difference]: Start difference. First operand 287 states and 485 transitions. Second operand 3 states. [2021-10-11 02:29:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:14,042 INFO L93 Difference]: Finished difference Result 857 states and 1452 transitions. [2021-10-11 02:29:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:14,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2021-10-11 02:29:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:14,047 INFO L225 Difference]: With dead ends: 857 [2021-10-11 02:29:14,047 INFO L226 Difference]: Without dead ends: 571 [2021-10-11 02:29:14,049 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 02:29:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-10-11 02:29:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-10-11 02:29:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2021-10-11 02:29:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 896 transitions. [2021-10-11 02:29:14,077 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 896 transitions. Word has length 92 [2021-10-11 02:29:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:14,077 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 896 transitions. [2021-10-11 02:29:14,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 896 transitions. [2021-10-11 02:29:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-11 02:29:14,083 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:14,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:14,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:29:14,084 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash 943738123, now seen corresponding path program 1 times [2021-10-11 02:29:14,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:14,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831094205] [2021-10-11 02:29:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:29:14,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831094205] [2021-10-11 02:29:14,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:14,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:14,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800553] [2021-10-11 02:29:14,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:14,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:14,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:14,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:14,159 INFO L87 Difference]: Start difference. First operand 571 states and 896 transitions. Second operand 3 states. [2021-10-11 02:29:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:14,650 INFO L93 Difference]: Finished difference Result 1567 states and 2465 transitions. [2021-10-11 02:29:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:14,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2021-10-11 02:29:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:14,659 INFO L225 Difference]: With dead ends: 1567 [2021-10-11 02:29:14,660 INFO L226 Difference]: Without dead ends: 997 [2021-10-11 02:29:14,662 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 02:29:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-11 02:29:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2021-10-11 02:29:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2021-10-11 02:29:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1219 transitions. [2021-10-11 02:29:14,699 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1219 transitions. Word has length 97 [2021-10-11 02:29:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:14,700 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1219 transitions. [2021-10-11 02:29:14,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1219 transitions. [2021-10-11 02:29:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-11 02:29:14,707 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:14,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:14,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:29:14,708 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:14,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:14,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1642081061, now seen corresponding path program 1 times [2021-10-11 02:29:14,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:14,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643514454] [2021-10-11 02:29:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:14,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643514454] [2021-10-11 02:29:14,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:14,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:29:14,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080750995] [2021-10-11 02:29:14,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:29:14,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:14,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:29:14,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:14,837 INFO L87 Difference]: Start difference. First operand 784 states and 1219 transitions. Second operand 4 states. [2021-10-11 02:29:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:15,648 INFO L93 Difference]: Finished difference Result 1780 states and 2740 transitions. [2021-10-11 02:29:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:29:15,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2021-10-11 02:29:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:15,656 INFO L225 Difference]: With dead ends: 1780 [2021-10-11 02:29:15,656 INFO L226 Difference]: Without dead ends: 997 [2021-10-11 02:29:15,658 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 02:29:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-11 02:29:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 855. [2021-10-11 02:29:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2021-10-11 02:29:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1260 transitions. [2021-10-11 02:29:15,690 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1260 transitions. Word has length 99 [2021-10-11 02:29:15,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:15,690 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1260 transitions. [2021-10-11 02:29:15,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:29:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1260 transitions. [2021-10-11 02:29:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-11 02:29:15,693 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:15,693 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:15,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:29:15,694 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:15,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:15,694 INFO L82 PathProgramCache]: Analyzing trace with hash -801258238, now seen corresponding path program 1 times [2021-10-11 02:29:15,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:15,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020545156] [2021-10-11 02:29:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:15,786 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 02:29:15,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020545156] [2021-10-11 02:29:15,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:15,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:15,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116033711] [2021-10-11 02:29:15,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:15,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:15,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:15,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:15,791 INFO L87 Difference]: Start difference. First operand 855 states and 1260 transitions. Second operand 3 states. [2021-10-11 02:29:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:16,220 INFO L93 Difference]: Finished difference Result 1851 states and 2715 transitions. [2021-10-11 02:29:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:16,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2021-10-11 02:29:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:16,227 INFO L225 Difference]: With dead ends: 1851 [2021-10-11 02:29:16,227 INFO L226 Difference]: Without dead ends: 997 [2021-10-11 02:29:16,229 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 02:29:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-11 02:29:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-11 02:29:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2021-10-11 02:29:16,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1426 transitions. [2021-10-11 02:29:16,256 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1426 transitions. Word has length 100 [2021-10-11 02:29:16,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:16,256 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1426 transitions. [2021-10-11 02:29:16,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:16,256 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1426 transitions. [2021-10-11 02:29:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-11 02:29:16,259 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:16,259 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-11 02:29:16,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:29:16,260 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1714457361, now seen corresponding path program 1 times [2021-10-11 02:29:16,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:16,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243418239] [2021-10-11 02:29:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-11 02:29:16,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243418239] [2021-10-11 02:29:16,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:16,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:16,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724634306] [2021-10-11 02:29:16,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:16,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:16,356 INFO L87 Difference]: Start difference. First operand 997 states and 1426 transitions. Second operand 3 states. [2021-10-11 02:29:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:16,749 INFO L93 Difference]: Finished difference Result 2206 states and 3160 transitions. [2021-10-11 02:29:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:16,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2021-10-11 02:29:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:16,757 INFO L225 Difference]: With dead ends: 2206 [2021-10-11 02:29:16,757 INFO L226 Difference]: Without dead ends: 1210 [2021-10-11 02:29:16,759 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 02:29:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-11 02:29:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2021-10-11 02:29:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2021-10-11 02:29:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1274 transitions. [2021-10-11 02:29:16,787 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1274 transitions. Word has length 103 [2021-10-11 02:29:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:16,788 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1274 transitions. [2021-10-11 02:29:16,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1274 transitions. [2021-10-11 02:29:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-11 02:29:16,790 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:16,791 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:16,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:29:16,791 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:16,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1486863798, now seen corresponding path program 1 times [2021-10-11 02:29:16,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:16,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116813124] [2021-10-11 02:29:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:16,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116813124] [2021-10-11 02:29:16,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:16,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:29:16,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963954108] [2021-10-11 02:29:16,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:29:16,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:16,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:29:16,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:16,869 INFO L87 Difference]: Start difference. First operand 997 states and 1274 transitions. Second operand 4 states. [2021-10-11 02:29:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:17,357 INFO L93 Difference]: Finished difference Result 1993 states and 2547 transitions. [2021-10-11 02:29:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:29:17,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2021-10-11 02:29:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:17,364 INFO L225 Difference]: With dead ends: 1993 [2021-10-11 02:29:17,364 INFO L226 Difference]: Without dead ends: 997 [2021-10-11 02:29:17,366 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 02:29:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-11 02:29:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-11 02:29:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2021-10-11 02:29:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1260 transitions. [2021-10-11 02:29:17,393 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1260 transitions. Word has length 104 [2021-10-11 02:29:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:17,393 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1260 transitions. [2021-10-11 02:29:17,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:29:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1260 transitions. [2021-10-11 02:29:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-11 02:29:17,396 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:17,396 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-10-11 02:29:17,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:29:17,397 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:17,397 INFO L82 PathProgramCache]: Analyzing trace with hash -100061657, now seen corresponding path program 1 times [2021-10-11 02:29:17,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:17,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996323854] [2021-10-11 02:29:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-11 02:29:17,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996323854] [2021-10-11 02:29:17,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:17,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:29:17,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94796986] [2021-10-11 02:29:17,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:17,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:17,443 INFO L87 Difference]: Start difference. First operand 997 states and 1260 transitions. Second operand 3 states. [2021-10-11 02:29:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:17,825 INFO L93 Difference]: Finished difference Result 2277 states and 2843 transitions. [2021-10-11 02:29:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:17,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2021-10-11 02:29:17,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:17,832 INFO L225 Difference]: With dead ends: 2277 [2021-10-11 02:29:17,833 INFO L226 Difference]: Without dead ends: 1281 [2021-10-11 02:29:17,834 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 02:29:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-10-11 02:29:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1139. [2021-10-11 02:29:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2021-10-11 02:29:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1427 transitions. [2021-10-11 02:29:17,869 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1427 transitions. Word has length 106 [2021-10-11 02:29:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:17,869 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1427 transitions. [2021-10-11 02:29:17,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1427 transitions. [2021-10-11 02:29:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-11 02:29:17,873 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:17,874 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:17,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:29:17,874 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:17,875 INFO L82 PathProgramCache]: Analyzing trace with hash -646394756, now seen corresponding path program 1 times [2021-10-11 02:29:17,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:17,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357847881] [2021-10-11 02:29:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-11 02:29:17,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357847881] [2021-10-11 02:29:17,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:17,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:29:17,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961328688] [2021-10-11 02:29:17,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:17,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:17,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:17,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:17,991 INFO L87 Difference]: Start difference. First operand 1139 states and 1427 transitions. Second operand 3 states. [2021-10-11 02:29:18,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:18,349 INFO L93 Difference]: Finished difference Result 2632 states and 3345 transitions. [2021-10-11 02:29:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:18,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2021-10-11 02:29:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:18,360 INFO L225 Difference]: With dead ends: 2632 [2021-10-11 02:29:18,360 INFO L226 Difference]: Without dead ends: 1494 [2021-10-11 02:29:18,362 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 02:29:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-10-11 02:29:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1210. [2021-10-11 02:29:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:29:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1523 transitions. [2021-10-11 02:29:18,406 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1523 transitions. Word has length 137 [2021-10-11 02:29:18,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:18,408 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1523 transitions. [2021-10-11 02:29:18,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1523 transitions. [2021-10-11 02:29:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-10-11 02:29:18,412 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:18,412 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:18,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:29:18,412 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2126446442, now seen corresponding path program 1 times [2021-10-11 02:29:18,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:18,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474611015] [2021-10-11 02:29:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-11 02:29:18,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474611015] [2021-10-11 02:29:18,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:18,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:29:18,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376829969] [2021-10-11 02:29:18,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:18,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:18,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:18,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:18,549 INFO L87 Difference]: Start difference. First operand 1210 states and 1523 transitions. Second operand 3 states. [2021-10-11 02:29:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:18,879 INFO L93 Difference]: Finished difference Result 2632 states and 3289 transitions. [2021-10-11 02:29:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:18,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2021-10-11 02:29:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:18,887 INFO L225 Difference]: With dead ends: 2632 [2021-10-11 02:29:18,888 INFO L226 Difference]: Without dead ends: 1423 [2021-10-11 02:29:18,890 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 02:29:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-10-11 02:29:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1281. [2021-10-11 02:29:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2021-10-11 02:29:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1600 transitions. [2021-10-11 02:29:18,924 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1600 transitions. Word has length 153 [2021-10-11 02:29:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:18,925 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1600 transitions. [2021-10-11 02:29:18,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1600 transitions. [2021-10-11 02:29:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-10-11 02:29:18,929 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:18,930 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:18,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-11 02:29:18,930 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1638898435, now seen corresponding path program 1 times [2021-10-11 02:29:18,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:18,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575829745] [2021-10-11 02:29:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 185 proven. 88 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-11 02:29:19,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575829745] [2021-10-11 02:29:19,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191962080] [2021-10-11 02:29:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/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 02:29:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:19,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:29:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-11 02:29:20,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-11 02:29:20,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:29:20,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-10-11 02:29:20,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419760124] [2021-10-11 02:29:20,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:20,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:20,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:20,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:29:20,318 INFO L87 Difference]: Start difference. First operand 1281 states and 1600 transitions. Second operand 3 states. [2021-10-11 02:29:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:20,697 INFO L93 Difference]: Finished difference Result 2561 states and 3199 transitions. [2021-10-11 02:29:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:20,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2021-10-11 02:29:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:20,705 INFO L225 Difference]: With dead ends: 2561 [2021-10-11 02:29:20,705 INFO L226 Difference]: Without dead ends: 1281 [2021-10-11 02:29:20,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:29:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-10-11 02:29:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1139. [2021-10-11 02:29:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2021-10-11 02:29:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1352 transitions. [2021-10-11 02:29:20,761 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1352 transitions. Word has length 218 [2021-10-11 02:29:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:20,762 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1352 transitions. [2021-10-11 02:29:20,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1352 transitions. [2021-10-11 02:29:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-11 02:29:20,767 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:20,767 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:20,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-11 02:29:20,993 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1337022527, now seen corresponding path program 1 times [2021-10-11 02:29:20,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:20,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476762847] [2021-10-11 02:29:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-11 02:29:21,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476762847] [2021-10-11 02:29:21,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918980602] [2021-10-11 02:29:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/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 02:29:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:21,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:29:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-10-11 02:29:21,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-10-11 02:29:22,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:29:22,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-11 02:29:22,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978550086] [2021-10-11 02:29:22,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:22,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:22,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:22,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:22,045 INFO L87 Difference]: Start difference. First operand 1139 states and 1352 transitions. Second operand 3 states. [2021-10-11 02:29:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:22,394 INFO L93 Difference]: Finished difference Result 2490 states and 2957 transitions. [2021-10-11 02:29:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:22,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 242 [2021-10-11 02:29:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:22,402 INFO L225 Difference]: With dead ends: 2490 [2021-10-11 02:29:22,403 INFO L226 Difference]: Without dead ends: 1352 [2021-10-11 02:29:22,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 483 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:22,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-10-11 02:29:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2021-10-11 02:29:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:29:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1426 transitions. [2021-10-11 02:29:22,444 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1426 transitions. Word has length 242 [2021-10-11 02:29:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:22,444 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1426 transitions. [2021-10-11 02:29:22,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:22,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1426 transitions. [2021-10-11 02:29:22,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-10-11 02:29:22,450 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:22,450 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:22,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-11 02:29:22,665 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash -859661985, now seen corresponding path program 1 times [2021-10-11 02:29:22,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:22,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270982749] [2021-10-11 02:29:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 236 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:23,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270982749] [2021-10-11 02:29:23,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059011206] [2021-10-11 02:29:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/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 02:29:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:29:23,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-10-11 02:29:23,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-10-11 02:29:24,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:29:24,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2021-10-11 02:29:24,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565043089] [2021-10-11 02:29:24,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:24,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:24,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:24,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:29:24,200 INFO L87 Difference]: Start difference. First operand 1210 states and 1426 transitions. Second operand 3 states. [2021-10-11 02:29:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:24,538 INFO L93 Difference]: Finished difference Result 2772 states and 3240 transitions. [2021-10-11 02:29:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:24,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 282 [2021-10-11 02:29:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:24,540 INFO L225 Difference]: With dead ends: 2772 [2021-10-11 02:29:24,540 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:29:24,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 561 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:29:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:29:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:29:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:29:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:29:24,544 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 282 [2021-10-11 02:29:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:24,545 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:29:24,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:29:24,545 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:29:24,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-11 02:29:24,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:29:25,204 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-10-11 02:29:25,497 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-10-11 02:29:25,501 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-11 02:29:25,501 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-11 02:29:25,501 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-11 02:29:25,501 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-11 02:29:25,501 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-11 02:29:25,502 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-11 02:29:25,502 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-11 02:29:25,502 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-11 02:29:25,502 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-11 02:29:25,502 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-11 02:29:25,502 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-11 02:29:25,502 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-11 02:29:25,503 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-11 02:29:25,503 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-11 02:29:25,503 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-11 02:29:25,503 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-11 02:29:25,503 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-11 02:29:25,503 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-11 02:29:25,503 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-11 02:29:25,504 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-11 02:29:25,504 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-11 02:29:25,504 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-11 02:29:25,504 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-11 02:29:25,504 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-11 02:29:25,504 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-11 02:29:25,504 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-11 02:29:25,505 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-11 02:29:25,505 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-11 02:29:25,505 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-11 02:29:25,505 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-11 02:29:25,505 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-11 02:29:25,505 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-11 02:29:25,505 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-11 02:29:25,506 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-11 02:29:25,506 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-11 02:29:25,506 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-11 02:29:25,506 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:29:25,506 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-11 02:29:25,506 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-11 02:29:25,506 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-11 02:29:25,507 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse3 (= ~a17~0 1)) (.cse9 (= ~a20~0 1))) (let ((.cse4 (<= ~a8~0 14)) (.cse8 (<= ~a16~0 4)) (.cse5 (<= ~a16~0 5)) (.cse1 (not (= ~a7~0 1))) (.cse7 (<= 15 ~a8~0)) (.cse0 (= ~a21~0 1)) (.cse6 (<= ~a17~0 0)) (.cse2 (or (and .cse9 .cse3) (and .cse9 (<= 5 ~a16~0))))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5 (<= ~a21~0 0) .cse2 .cse3) (and .cse4 .cse6 .cse2) (and .cse6 .cse1 .cse7) (and .cse4 .cse8 .cse3) (and .cse0 .cse8 .cse9 .cse3) (and .cse5 .cse6) (and .cse1 .cse7 .cse3) (and .cse0 .cse6 .cse2)))) [2021-10-11 02:29:25,507 INFO L262 CegarLoopResult]: For program point L485-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:29:25,507 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-11 02:29:25,507 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-11 02:29:25,508 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-11 02:29:25,508 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-11 02:29:25,508 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-11 02:29:25,508 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-11 02:29:25,508 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-11 02:29:25,508 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:29:25,508 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-11 02:29:25,509 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-11 02:29:25,509 INFO L262 CegarLoopResult]: For program point L488-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:29:25,509 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-11 02:29:25,509 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-11 02:29:25,509 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-11 02:29:25,509 INFO L262 CegarLoopResult]: For program point L489(line 489) no Hoare annotation was computed. [2021-10-11 02:29:25,509 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-11 02:29:25,509 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-11 02:29:25,510 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-11 02:29:25,510 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-11 02:29:25,510 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-11 02:29:25,510 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-11 02:29:25,510 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-11 02:29:25,510 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-11 02:29:25,510 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-11 02:29:25,510 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-11 02:29:25,511 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse3 (= ~a17~0 1)) (.cse9 (= ~a20~0 1))) (let ((.cse4 (<= ~a8~0 14)) (.cse8 (<= ~a16~0 4)) (.cse5 (<= ~a16~0 5)) (.cse1 (not (= ~a7~0 1))) (.cse7 (<= 15 ~a8~0)) (.cse0 (= ~a21~0 1)) (.cse6 (<= ~a17~0 0)) (.cse2 (or (and .cse9 .cse3) (and .cse9 (<= 5 ~a16~0))))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5 (<= ~a21~0 0) .cse2 .cse3) (and .cse4 .cse6 .cse2) (and .cse6 .cse1 .cse7) (and .cse4 .cse8 .cse3) (and .cse0 .cse8 .cse9 .cse3) (and .cse5 .cse6) (and .cse1 .cse7 .cse3) (and .cse0 .cse6 .cse2)))) [2021-10-11 02:29:25,511 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-11 02:29:25,511 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 489) no Hoare annotation was computed. [2021-10-11 02:29:25,511 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-11 02:29:25,511 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-11 02:29:25,512 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-11 02:29:25,512 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-11 02:29:25,512 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-11 02:29:25,512 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-11 02:29:25,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:25 BoogieIcfgContainer [2021-10-11 02:29:25,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:25,544 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:25,544 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:25,544 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:25,545 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:11" (3/4) ... [2021-10-11 02:29:25,550 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:29:25,582 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2021-10-11 02:29:25,584 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-11 02:29:25,586 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-11 02:29:25,588 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 02:29:25,773 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c958145c-6c18-40da-a8c4-b1c9921cc5a7/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:29:25,773 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:25,775 INFO L168 Benchmark]: Toolchain (without parser) took 17291.10 ms. Allocated memory was 138.4 MB in the beginning and 402.7 MB in the end (delta: 264.2 MB). Free memory was 104.5 MB in the beginning and 325.6 MB in the end (delta: -221.1 MB). Peak memory consumption was 43.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:25,775 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 81.8 MB. Free memory was 37.5 MB in the beginning and 37.5 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:25,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 613.41 ms. Allocated memory is still 138.4 MB. Free memory was 104.1 MB in the beginning and 97.9 MB in the end (delta: 6.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:25,776 INFO L168 Benchmark]: Boogie Procedure Inliner took 106.22 ms. Allocated memory is still 138.4 MB. Free memory was 97.9 MB in the beginning and 92.1 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:25,777 INFO L168 Benchmark]: Boogie Preprocessor took 100.52 ms. Allocated memory is still 138.4 MB. Free memory was 92.1 MB in the beginning and 87.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:25,777 INFO L168 Benchmark]: RCFGBuilder took 2148.11 ms. Allocated memory was 138.4 MB in the beginning and 172.0 MB in the end (delta: 33.6 MB). Free memory was 87.4 MB in the beginning and 95.3 MB in the end (delta: -7.9 MB). Peak memory consumption was 65.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:25,777 INFO L168 Benchmark]: TraceAbstraction took 14085.85 ms. Allocated memory was 172.0 MB in the beginning and 402.7 MB in the end (delta: 230.7 MB). Free memory was 94.3 MB in the beginning and 340.3 MB in the end (delta: -246.0 MB). Peak memory consumption was 194.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:25,778 INFO L168 Benchmark]: Witness Printer took 229.35 ms. Allocated memory is still 402.7 MB. Free memory was 340.3 MB in the beginning and 325.6 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:25,780 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 81.8 MB. Free memory was 37.5 MB in the beginning and 37.5 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 613.41 ms. Allocated memory is still 138.4 MB. Free memory was 104.1 MB in the beginning and 97.9 MB in the end (delta: 6.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 106.22 ms. Allocated memory is still 138.4 MB. Free memory was 97.9 MB in the beginning and 92.1 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 100.52 ms. Allocated memory is still 138.4 MB. Free memory was 92.1 MB in the beginning and 87.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2148.11 ms. Allocated memory was 138.4 MB in the beginning and 172.0 MB in the end (delta: 33.6 MB). Free memory was 87.4 MB in the beginning and 95.3 MB in the end (delta: -7.9 MB). Peak memory consumption was 65.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14085.85 ms. Allocated memory was 172.0 MB in the beginning and 402.7 MB in the end (delta: 230.7 MB). Free memory was 94.3 MB in the beginning and 340.3 MB in the end (delta: -246.0 MB). Peak memory consumption was 194.4 MB. Max. memory is 16.1 GB. * Witness Printer took 229.35 ms. Allocated memory is still 402.7 MB. Free memory was 340.3 MB in the beginning and 325.6 MB in the end (delta: 14.6 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: 489]: 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: ((((((((((a21 == 1 && !(a7 == 1)) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) && a17 == 1) || ((((a8 <= 14 && a16 <= 5) && a21 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) && a17 == 1)) || ((a8 <= 14 && a17 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16)))) || ((a17 <= 0 && !(a7 == 1)) && 15 <= a8)) || ((a8 <= 14 && a16 <= 4) && a17 == 1)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || (a16 <= 5 && a17 <= 0)) || ((!(a7 == 1) && 15 <= a8) && a17 == 1)) || ((a21 == 1 && a17 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a21 == 1 && !(a7 == 1)) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) && a17 == 1) || ((((a8 <= 14 && a16 <= 5) && a21 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) && a17 == 1)) || ((a8 <= 14 && a17 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16)))) || ((a17 <= 0 && !(a7 == 1)) && 15 <= a8)) || ((a8 <= 14 && a16 <= 4) && a17 == 1)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || (a16 <= 5 && a17 <= 0)) || ((!(a7 == 1) && 15 <= a8) && a17 == 1)) || ((a21 == 1 && a17 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.2s, OverallIterations: 14, TraceHistogramMax: 6, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 639 SDtfs, 828 SDslu, 59 SDs, 0 SdLazy, 3067 SolverSat, 724 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1524 GetRequests, 1492 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1281occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 14 MinimizatonAttempts, 1420 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 51 NumberOfFragments, 303 HoareAnnotationTreeSize, 3 FomulaSimplifications, 6648 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 826 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 2623 NumberOfCodeBlocks, 2623 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 3345 ConstructedInterpolants, 0 QuantifiedInterpolants, 2672598 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1531 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 3469/3909 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...