./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.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-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan --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 32adbfac5f3e3ea232180afd045da0027ca6d993 ................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan --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 32adbfac5f3e3ea232180afd045da0027ca6d993 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:19:55,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:19:55,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:19:55,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:19:55,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:19:55,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:19:55,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:19:55,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:19:55,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:19:55,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:19:55,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:19:55,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:19:55,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:19:55,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:19:55,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:19:55,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:19:55,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:19:55,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:19:55,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:19:55,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:19:55,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:19:55,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:19:55,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:19:55,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:19:55,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:19:55,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:19:55,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:19:55,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:19:55,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:19:55,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:19:55,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:19:55,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:19:55,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:19:55,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:19:55,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:19:55,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:19:55,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:19:55,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:19:55,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:19:55,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:19:55,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:19:55,441 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 11:19:55,458 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:19:55,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:19:55,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:19:55,459 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:19:55,459 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:19:55,459 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:19:55,459 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 11:19:55,459 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:19:55,459 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:19:55,460 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 11:19:55,460 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 11:19:55,460 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:19:55,460 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 11:19:55,460 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 11:19:55,460 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 11:19:55,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:19:55,461 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:19:55,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:19:55,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:19:55,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:19:55,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 11:19:55,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:19:55,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 11:19:55,462 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:19:55,462 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:19:55,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 11:19:55,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:19:55,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 11:19:55,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:19:55,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:19:55,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:19:55,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:19:55,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:19:55,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 11:19:55,463 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 11:19:55,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 11:19:55,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 11:19:55,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:19:55,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:19:55,463 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-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32adbfac5f3e3ea232180afd045da0027ca6d993 [2020-12-09 11:19:55,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:19:55,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:19:55,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:19:55,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:19:55,657 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:19:55,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2020-12-09 11:19:55,697 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/data/44d809a44/121306de20b743c18c16050812f99a35/FLAG6dfb2fbec [2020-12-09 11:19:56,070 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:19:56,071 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2020-12-09 11:19:56,077 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/data/44d809a44/121306de20b743c18c16050812f99a35/FLAG6dfb2fbec [2020-12-09 11:19:56,088 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/data/44d809a44/121306de20b743c18c16050812f99a35 [2020-12-09 11:19:56,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:19:56,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:19:56,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:19:56,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:19:56,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:19:56,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56, skipping insertion in model container [2020-12-09 11:19:56,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:19:56,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:19:56,246 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2020-12-09 11:19:56,249 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2020-12-09 11:19:56,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:19:56,258 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:19:56,277 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2020-12-09 11:19:56,278 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2020-12-09 11:19:56,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:19:56,291 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:19:56,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56 WrapperNode [2020-12-09 11:19:56,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:19:56,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:19:56,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:19:56,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:19:56,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:19:56,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:19:56,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:19:56,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:19:56,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (1/1) ... [2020-12-09 11:19:56,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:19:56,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:19:56,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:19:56,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:19:56,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/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 [2020-12-09 11:19:56,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 11:19:56,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:19:56,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-09 11:19:56,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:19:56,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:19:56,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 11:19:56,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 11:19:56,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:19:56,999 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-09 11:19:57,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:19:57 BoogieIcfgContainer [2020-12-09 11:19:57,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:19:57,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:19:57,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:19:57,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:19:57,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:19:56" (1/3) ... [2020-12-09 11:19:57,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec14a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:19:57, skipping insertion in model container [2020-12-09 11:19:57,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:56" (2/3) ... [2020-12-09 11:19:57,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec14a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:19:57, skipping insertion in model container [2020-12-09 11:19:57,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:19:57" (3/3) ... [2020-12-09 11:19:57,009 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2020-12-09 11:19:57,022 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:19:57,025 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 11:19:57,033 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 11:19:57,048 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:19:57,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 11:19:57,048 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:19:57,049 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:19:57,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:19:57,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:19:57,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:19:57,049 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:19:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-09 11:19:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 11:19:57,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:19:57,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:19:57,060 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:19:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:19:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash -712779630, now seen corresponding path program 1 times [2020-12-09 11:19:57,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:19:57,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009302170] [2020-12-09 11:19:57,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:19:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:19:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:19:57,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009302170] [2020-12-09 11:19:57,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:19:57,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:19:57,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875945840] [2020-12-09 11:19:57,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 11:19:57,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:19:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 11:19:57,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 11:19:57,192 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-09 11:19:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:19:57,202 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2020-12-09 11:19:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 11:19:57,203 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 11:19:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:19:57,209 INFO L225 Difference]: With dead ends: 36 [2020-12-09 11:19:57,209 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 11:19:57,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 11:19:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 11:19:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 11:19:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 11:19:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-09 11:19:57,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2020-12-09 11:19:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:19:57,232 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-09 11:19:57,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 11:19:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-09 11:19:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 11:19:57,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:19:57,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:19:57,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 11:19:57,233 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:19:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:19:57,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1505041362, now seen corresponding path program 1 times [2020-12-09 11:19:57,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:19:57,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634249913] [2020-12-09 11:19:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:19:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:19:57,297 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:19:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:19:57,351 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:19:57,368 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 11:19:57,368 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:19:57,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 11:19:57,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:19:57 BoogieIcfgContainer [2020-12-09 11:19:57,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:19:57,389 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:19:57,389 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:19:57,389 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:19:57,389 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:19:57" (3/4) ... [2020-12-09 11:19:57,392 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 11:19:57,392 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:19:57,393 INFO L168 Benchmark]: Toolchain (without parser) took 1300.78 ms. Allocated memory is still 121.6 MB. Free memory was 83.0 MB in the beginning and 50.9 MB in the end (delta: 32.1 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. [2020-12-09 11:19:57,394 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 121.6 MB. Free memory is still 99.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:19:57,395 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.77 ms. Allocated memory is still 121.6 MB. Free memory was 82.8 MB in the beginning and 95.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 11:19:57,395 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.75 ms. Allocated memory is still 121.6 MB. Free memory was 95.8 MB in the beginning and 93.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:19:57,396 INFO L168 Benchmark]: Boogie Preprocessor took 28.17 ms. Allocated memory is still 121.6 MB. Free memory was 93.7 MB in the beginning and 92.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:19:57,396 INFO L168 Benchmark]: RCFGBuilder took 640.49 ms. Allocated memory is still 121.6 MB. Free memory was 92.1 MB in the beginning and 80.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 53.3 MB. Max. memory is 16.1 GB. [2020-12-09 11:19:57,397 INFO L168 Benchmark]: TraceAbstraction took 385.52 ms. Allocated memory is still 121.6 MB. Free memory was 80.3 MB in the beginning and 50.9 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-12-09 11:19:57,397 INFO L168 Benchmark]: Witness Printer took 3.10 ms. Allocated memory is still 121.6 MB. Free memory is still 50.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:19:57,400 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 121.6 MB. Free memory is still 99.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 198.77 ms. Allocated memory is still 121.6 MB. Free memory was 82.8 MB in the beginning and 95.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.75 ms. Allocated memory is still 121.6 MB. Free memory was 95.8 MB in the beginning and 93.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.17 ms. Allocated memory is still 121.6 MB. Free memory was 93.7 MB in the beginning and 92.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 640.49 ms. Allocated memory is still 121.6 MB. Free memory was 92.1 MB in the beginning and 80.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 53.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 385.52 ms. Allocated memory is still 121.6 MB. Free memory was 80.3 MB in the beginning and 50.9 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Witness Printer took 3.10 ms. Allocated memory is still 121.6 MB. Free memory is still 50.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 76]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 75. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L57] return x != x; [L69] EXPR isnan_float(x) && !isnan_float(y) [L57] return x != x; [L69] EXPR isnan_float(x) && !isnan_float(y) [L69-L70] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L69-L70] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L72] float res = fmax_float(x, y); [L57] return x != x; [L75] EXPR isnan_float(x) && !isnan_float(y) [L57] return x != x; [L75] EXPR isnan_float(x) && !isnan_float(y) [L75] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L76] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:19:59,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:19:59,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:19:59,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:19:59,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:19:59,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:19:59,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:19:59,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:19:59,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:19:59,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:19:59,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:19:59,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:19:59,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:19:59,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:19:59,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:19:59,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:19:59,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:19:59,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:19:59,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:19:59,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:19:59,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:19:59,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:19:59,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:19:59,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:19:59,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:19:59,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:19:59,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:19:59,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:19:59,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:19:59,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:19:59,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:19:59,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:19:59,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:19:59,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:19:59,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:19:59,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:19:59,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:19:59,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:19:59,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:19:59,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:19:59,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:19:59,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 11:19:59,123 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:19:59,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:19:59,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:19:59,125 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:19:59,125 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:19:59,125 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:19:59,125 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:19:59,125 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:19:59,125 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:19:59,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:19:59,126 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:19:59,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:19:59,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:19:59,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 11:19:59,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:19:59,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 11:19:59,127 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:19:59,128 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 11:19:59,128 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 11:19:59,128 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:19:59,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 11:19:59,128 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:19:59,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 11:19:59,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:19:59,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 11:19:59,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:19:59,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:19:59,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:19:59,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:19:59,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 11:19:59,130 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 11:19:59,130 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 11:19:59,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 11:19:59,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:19:59,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:19:59,131 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32adbfac5f3e3ea232180afd045da0027ca6d993 [2020-12-09 11:19:59,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:19:59,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:19:59,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:19:59,381 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:19:59,382 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:19:59,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2020-12-09 11:19:59,424 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/data/ebe9d5638/09745c400bec44e899408eee0e2a2306/FLAG0aa03ddee [2020-12-09 11:19:59,813 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:19:59,813 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2020-12-09 11:19:59,819 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/data/ebe9d5638/09745c400bec44e899408eee0e2a2306/FLAG0aa03ddee [2020-12-09 11:19:59,828 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/data/ebe9d5638/09745c400bec44e899408eee0e2a2306 [2020-12-09 11:19:59,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:19:59,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:19:59,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:19:59,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:19:59,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:19:59,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:19:59" (1/1) ... [2020-12-09 11:19:59,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d73329b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:19:59, skipping insertion in model container [2020-12-09 11:19:59,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:19:59" (1/1) ... [2020-12-09 11:19:59,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:19:59,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:19:59,965 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2020-12-09 11:19:59,968 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2020-12-09 11:19:59,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:19:59,978 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:19:59,994 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2020-12-09 11:19:59,995 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2020-12-09 11:19:59,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:20:00,016 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:20:00,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00 WrapperNode [2020-12-09 11:20:00,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:20:00,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:20:00,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:20:00,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:20:00,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (1/1) ... [2020-12-09 11:20:00,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (1/1) ... [2020-12-09 11:20:00,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:20:00,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:20:00,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:20:00,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:20:00,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (1/1) ... [2020-12-09 11:20:00,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (1/1) ... [2020-12-09 11:20:00,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (1/1) ... [2020-12-09 11:20:00,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (1/1) ... [2020-12-09 11:20:00,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (1/1) ... [2020-12-09 11:20:00,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (1/1) ... [2020-12-09 11:20:00,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (1/1) ... [2020-12-09 11:20:00,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:20:00,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:20:00,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:20:00,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:20:00,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/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 [2020-12-09 11:20:00,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 11:20:00,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:20:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 11:20:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:20:00,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:20:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-12-09 11:20:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 11:20:00,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:20:00,498 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-09 11:20:00,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:20:00 BoogieIcfgContainer [2020-12-09 11:20:00,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:20:00,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:20:00,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:20:00,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:20:00,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:19:59" (1/3) ... [2020-12-09 11:20:00,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cc5a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:20:00, skipping insertion in model container [2020-12-09 11:20:00,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:20:00" (2/3) ... [2020-12-09 11:20:00,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cc5a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:20:00, skipping insertion in model container [2020-12-09 11:20:00,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:20:00" (3/3) ... [2020-12-09 11:20:00,508 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2020-12-09 11:20:00,521 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:20:00,524 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 11:20:00,534 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 11:20:00,556 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:20:00,556 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 11:20:00,556 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:20:00,556 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:20:00,557 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:20:00,557 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:20:00,557 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:20:00,557 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:20:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-12-09 11:20:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 11:20:00,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:00,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:20:00,575 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1204154757, now seen corresponding path program 1 times [2020-12-09 11:20:00,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:00,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639868252] [2020-12-09 11:20:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:00,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 11:20:00,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:00,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:00,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639868252] [2020-12-09 11:20:00,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:00,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:20:00,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766245668] [2020-12-09 11:20:00,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 11:20:00,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:00,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 11:20:00,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 11:20:00,707 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-12-09 11:20:00,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:00,721 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2020-12-09 11:20:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 11:20:00,722 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-12-09 11:20:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:00,729 INFO L225 Difference]: With dead ends: 82 [2020-12-09 11:20:00,729 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 11:20:00,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 11:20:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 11:20:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-09 11:20:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 11:20:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-12-09 11:20:00,756 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 16 [2020-12-09 11:20:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:00,756 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-12-09 11:20:00,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 11:20:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-12-09 11:20:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 11:20:00,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:00,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:20:00,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 11:20:00,958 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:00,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:00,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1262247077, now seen corresponding path program 1 times [2020-12-09 11:20:00,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:00,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742058331] [2020-12-09 11:20:00,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:01,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:20:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:01,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:01,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742058331] [2020-12-09 11:20:01,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:01,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:20:01,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123970221] [2020-12-09 11:20:01,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:20:01,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:01,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:20:01,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:20:01,195 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 4 states. [2020-12-09 11:20:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:01,244 INFO L93 Difference]: Finished difference Result 82 states and 111 transitions. [2020-12-09 11:20:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:20:01,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 11:20:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:01,245 INFO L225 Difference]: With dead ends: 82 [2020-12-09 11:20:01,246 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 11:20:01,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:20:01,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 11:20:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-12-09 11:20:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 11:20:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2020-12-09 11:20:01,254 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 17 [2020-12-09 11:20:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:01,254 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2020-12-09 11:20:01,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:20:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2020-12-09 11:20:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 11:20:01,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:01,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:20:01,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 11:20:01,457 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:01,460 INFO L82 PathProgramCache]: Analyzing trace with hash 44236684, now seen corresponding path program 1 times [2020-12-09 11:20:01,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:01,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059132473] [2020-12-09 11:20:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:01,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:20:01,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:01,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:01,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059132473] [2020-12-09 11:20:01,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:01,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:20:01,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740990239] [2020-12-09 11:20:01,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:20:01,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:01,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:20:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:20:01,629 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand 4 states. [2020-12-09 11:20:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:01,671 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-12-09 11:20:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:20:01,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 11:20:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:01,672 INFO L225 Difference]: With dead ends: 77 [2020-12-09 11:20:01,673 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 11:20:01,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:20:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 11:20:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-12-09 11:20:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-09 11:20:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2020-12-09 11:20:01,680 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 18 [2020-12-09 11:20:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:01,680 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2020-12-09 11:20:01,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:20:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2020-12-09 11:20:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 11:20:01,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:01,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:20:01,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 11:20:01,883 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:01,885 INFO L82 PathProgramCache]: Analyzing trace with hash -674173253, now seen corresponding path program 1 times [2020-12-09 11:20:01,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:01,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915932797] [2020-12-09 11:20:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:01,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:20:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:02,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:02,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915932797] [2020-12-09 11:20:02,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:02,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:20:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037687488] [2020-12-09 11:20:02,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:20:02,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:20:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:20:02,017 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 4 states. [2020-12-09 11:20:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:02,059 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2020-12-09 11:20:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:20:02,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-09 11:20:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:02,061 INFO L225 Difference]: With dead ends: 79 [2020-12-09 11:20:02,061 INFO L226 Difference]: Without dead ends: 66 [2020-12-09 11:20:02,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:20:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-09 11:20:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2020-12-09 11:20:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-09 11:20:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2020-12-09 11:20:02,067 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 19 [2020-12-09 11:20:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:02,067 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2020-12-09 11:20:02,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:20:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2020-12-09 11:20:02,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 11:20:02,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:02,069 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] [2020-12-09 11:20:02,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 11:20:02,270 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:02,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:02,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1345927737, now seen corresponding path program 1 times [2020-12-09 11:20:02,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:02,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038849104] [2020-12-09 11:20:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:20:02,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:02,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:02,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038849104] [2020-12-09 11:20:02,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:02,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:20:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796791479] [2020-12-09 11:20:02,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:20:02,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:20:02,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:20:02,390 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 4 states. [2020-12-09 11:20:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:02,434 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2020-12-09 11:20:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:20:02,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-09 11:20:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:02,435 INFO L225 Difference]: With dead ends: 79 [2020-12-09 11:20:02,436 INFO L226 Difference]: Without dead ends: 66 [2020-12-09 11:20:02,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:20:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-09 11:20:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2020-12-09 11:20:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-09 11:20:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2020-12-09 11:20:02,442 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 20 [2020-12-09 11:20:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:02,443 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2020-12-09 11:20:02,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:20:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2020-12-09 11:20:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 11:20:02,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:02,444 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] [2020-12-09 11:20:02,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 11:20:02,645 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1380709804, now seen corresponding path program 1 times [2020-12-09 11:20:02,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:02,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008489701] [2020-12-09 11:20:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:02,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 11:20:02,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:02,834 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:02,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:02,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:02,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008489701] [2020-12-09 11:20:02,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:02,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 11:20:02,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836676876] [2020-12-09 11:20:02,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 11:20:02,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:02,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 11:20:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 11:20:02,893 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 7 states. [2020-12-09 11:20:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:03,120 INFO L93 Difference]: Finished difference Result 149 states and 197 transitions. [2020-12-09 11:20:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 11:20:03,120 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-09 11:20:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:03,122 INFO L225 Difference]: With dead ends: 149 [2020-12-09 11:20:03,122 INFO L226 Difference]: Without dead ends: 140 [2020-12-09 11:20:03,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-09 11:20:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-09 11:20:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 75. [2020-12-09 11:20:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-09 11:20:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2020-12-09 11:20:03,130 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 21 [2020-12-09 11:20:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:03,130 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2020-12-09 11:20:03,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 11:20:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2020-12-09 11:20:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 11:20:03,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:03,131 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] [2020-12-09 11:20:03,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 11:20:03,332 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:03,333 INFO L82 PathProgramCache]: Analyzing trace with hash 147544209, now seen corresponding path program 1 times [2020-12-09 11:20:03,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:03,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606802273] [2020-12-09 11:20:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:03,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 11:20:03,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:03,480 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:03,480 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:03,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:03,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:03,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606802273] [2020-12-09 11:20:03,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:03,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-09 11:20:03,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638120712] [2020-12-09 11:20:03,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 11:20:03,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 11:20:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-09 11:20:03,625 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand 9 states. [2020-12-09 11:20:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:04,180 INFO L93 Difference]: Finished difference Result 180 states and 237 transitions. [2020-12-09 11:20:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 11:20:04,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-09 11:20:04,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:04,182 INFO L225 Difference]: With dead ends: 180 [2020-12-09 11:20:04,182 INFO L226 Difference]: Without dead ends: 178 [2020-12-09 11:20:04,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-12-09 11:20:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-09 11:20:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 89. [2020-12-09 11:20:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-09 11:20:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2020-12-09 11:20:04,191 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 22 [2020-12-09 11:20:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:04,191 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2020-12-09 11:20:04,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 11:20:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2020-12-09 11:20:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 11:20:04,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:04,192 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] [2020-12-09 11:20:04,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 11:20:04,393 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1845695531, now seen corresponding path program 1 times [2020-12-09 11:20:04,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:04,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953985852] [2020-12-09 11:20:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:04,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 11:20:04,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:04,545 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:04,545 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:04,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:04,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953985852] [2020-12-09 11:20:04,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:04,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 11:20:04,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749913050] [2020-12-09 11:20:04,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 11:20:04,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:04,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 11:20:04,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 11:20:04,590 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand 7 states. [2020-12-09 11:20:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:04,945 INFO L93 Difference]: Finished difference Result 166 states and 219 transitions. [2020-12-09 11:20:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 11:20:04,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-09 11:20:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:04,946 INFO L225 Difference]: With dead ends: 166 [2020-12-09 11:20:04,946 INFO L226 Difference]: Without dead ends: 131 [2020-12-09 11:20:04,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-09 11:20:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-09 11:20:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2020-12-09 11:20:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-09 11:20:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2020-12-09 11:20:04,953 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 23 [2020-12-09 11:20:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:04,954 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2020-12-09 11:20:04,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 11:20:04,954 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2020-12-09 11:20:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 11:20:04,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:04,955 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] [2020-12-09 11:20:05,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 11:20:05,156 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:05,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:05,158 INFO L82 PathProgramCache]: Analyzing trace with hash 156888005, now seen corresponding path program 1 times [2020-12-09 11:20:05,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:05,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584845676] [2020-12-09 11:20:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:05,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:20:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:05,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584845676] [2020-12-09 11:20:05,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:05,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:20:05,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425162942] [2020-12-09 11:20:05,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:20:05,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:20:05,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:20:05,293 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand 4 states. [2020-12-09 11:20:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:05,346 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2020-12-09 11:20:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:20:05,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-12-09 11:20:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:05,347 INFO L225 Difference]: With dead ends: 133 [2020-12-09 11:20:05,347 INFO L226 Difference]: Without dead ends: 117 [2020-12-09 11:20:05,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:20:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-09 11:20:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2020-12-09 11:20:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-09 11:20:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2020-12-09 11:20:05,353 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 24 [2020-12-09 11:20:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:05,354 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2020-12-09 11:20:05,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:20:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2020-12-09 11:20:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 11:20:05,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:05,355 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] [2020-12-09 11:20:05,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 11:20:05,556 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1621213116, now seen corresponding path program 1 times [2020-12-09 11:20:05,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:05,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474792572] [2020-12-09 11:20:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:05,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 11:20:05,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:05,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:05,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474792572] [2020-12-09 11:20:05,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:05,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 11:20:05,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582105953] [2020-12-09 11:20:05,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:20:05,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:20:05,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:20:05,670 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand 3 states. [2020-12-09 11:20:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:05,685 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2020-12-09 11:20:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:20:05,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-09 11:20:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:05,686 INFO L225 Difference]: With dead ends: 96 [2020-12-09 11:20:05,686 INFO L226 Difference]: Without dead ends: 94 [2020-12-09 11:20:05,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:20:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-09 11:20:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-09 11:20:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-09 11:20:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2020-12-09 11:20:05,691 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 24 [2020-12-09 11:20:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:05,692 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2020-12-09 11:20:05,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:20:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2020-12-09 11:20:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 11:20:05,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:05,693 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] [2020-12-09 11:20:05,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 11:20:05,894 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:05,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1838896133, now seen corresponding path program 1 times [2020-12-09 11:20:05,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:05,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688263255] [2020-12-09 11:20:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:06,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:20:06,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:06,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:06,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688263255] [2020-12-09 11:20:06,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:06,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:20:06,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603182309] [2020-12-09 11:20:06,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:20:06,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:06,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:20:06,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:20:06,024 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand 4 states. [2020-12-09 11:20:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:06,072 INFO L93 Difference]: Finished difference Result 139 states and 176 transitions. [2020-12-09 11:20:06,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:20:06,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-09 11:20:06,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:06,073 INFO L225 Difference]: With dead ends: 139 [2020-12-09 11:20:06,073 INFO L226 Difference]: Without dead ends: 122 [2020-12-09 11:20:06,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:20:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-09 11:20:06,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2020-12-09 11:20:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-09 11:20:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2020-12-09 11:20:06,081 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 25 [2020-12-09 11:20:06,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:06,082 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2020-12-09 11:20:06,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:20:06,082 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2020-12-09 11:20:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 11:20:06,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:06,083 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] [2020-12-09 11:20:06,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-09 11:20:06,284 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1741974657, now seen corresponding path program 1 times [2020-12-09 11:20:06,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:06,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911085237] [2020-12-09 11:20:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:06,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 11:20:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:06,412 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:06,412 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:06,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:06,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911085237] [2020-12-09 11:20:06,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:06,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 11:20:06,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801522839] [2020-12-09 11:20:06,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 11:20:06,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:06,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 11:20:06,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 11:20:06,465 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand 7 states. [2020-12-09 11:20:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:06,692 INFO L93 Difference]: Finished difference Result 131 states and 173 transitions. [2020-12-09 11:20:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 11:20:06,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-09 11:20:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:06,693 INFO L225 Difference]: With dead ends: 131 [2020-12-09 11:20:06,693 INFO L226 Difference]: Without dead ends: 118 [2020-12-09 11:20:06,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-09 11:20:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-09 11:20:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 89. [2020-12-09 11:20:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-09 11:20:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2020-12-09 11:20:06,698 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 25 [2020-12-09 11:20:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:06,698 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2020-12-09 11:20:06,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 11:20:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2020-12-09 11:20:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 11:20:06,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:06,699 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] [2020-12-09 11:20:06,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-09 11:20:06,900 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash 839729769, now seen corresponding path program 1 times [2020-12-09 11:20:06,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:06,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613166171] [2020-12-09 11:20:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:06,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 11:20:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:06,971 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:06,971 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:07,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:07,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613166171] [2020-12-09 11:20:07,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:07,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 11:20:07,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461509420] [2020-12-09 11:20:07,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 11:20:07,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:07,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 11:20:07,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-09 11:20:07,020 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 8 states. [2020-12-09 11:20:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:07,255 INFO L93 Difference]: Finished difference Result 114 states and 147 transitions. [2020-12-09 11:20:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 11:20:07,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-09 11:20:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:07,256 INFO L225 Difference]: With dead ends: 114 [2020-12-09 11:20:07,256 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 11:20:07,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-09 11:20:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 11:20:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-12-09 11:20:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 11:20:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-12-09 11:20:07,260 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 25 [2020-12-09 11:20:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:07,260 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-12-09 11:20:07,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 11:20:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-12-09 11:20:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 11:20:07,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:07,261 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] [2020-12-09 11:20:07,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-09 11:20:07,462 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:07,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1281876129, now seen corresponding path program 1 times [2020-12-09 11:20:07,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:07,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923063621] [2020-12-09 11:20:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 11:20:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:07,582 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:07,582 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:07,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:07,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923063621] [2020-12-09 11:20:07,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:07,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 11:20:07,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456747856] [2020-12-09 11:20:07,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 11:20:07,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:07,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 11:20:07,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 11:20:07,626 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 7 states. [2020-12-09 11:20:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:07,790 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-12-09 11:20:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 11:20:07,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-09 11:20:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:07,791 INFO L225 Difference]: With dead ends: 84 [2020-12-09 11:20:07,791 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 11:20:07,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-09 11:20:07,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 11:20:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-09 11:20:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 11:20:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-12-09 11:20:07,795 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 25 [2020-12-09 11:20:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:07,795 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-12-09 11:20:07,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 11:20:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-12-09 11:20:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 11:20:07,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:07,796 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] [2020-12-09 11:20:07,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-09 11:20:07,997 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash -144403189, now seen corresponding path program 1 times [2020-12-09 11:20:07,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:07,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176891236] [2020-12-09 11:20:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:08,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 11:20:08,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:08,104 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:08,104 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:08,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:08,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176891236] [2020-12-09 11:20:08,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:08,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 11:20:08,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111720811] [2020-12-09 11:20:08,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:20:08,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:08,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:20:08,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:20:08,140 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 6 states. [2020-12-09 11:20:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:08,294 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2020-12-09 11:20:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 11:20:08,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-09 11:20:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:08,295 INFO L225 Difference]: With dead ends: 82 [2020-12-09 11:20:08,295 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 11:20:08,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-09 11:20:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 11:20:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-09 11:20:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 11:20:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-12-09 11:20:08,299 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 26 [2020-12-09 11:20:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:08,299 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-12-09 11:20:08,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:20:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-12-09 11:20:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 11:20:08,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:08,300 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] [2020-12-09 11:20:08,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-12-09 11:20:08,501 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:08,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:08,502 INFO L82 PathProgramCache]: Analyzing trace with hash -953749815, now seen corresponding path program 1 times [2020-12-09 11:20:08,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:08,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145246506] [2020-12-09 11:20:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:08,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 11:20:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:08,772 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-12-09 11:20:08,787 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-09 11:20:08,787 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:08,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:08,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145246506] [2020-12-09 11:20:08,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:08,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-09 11:20:08,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173252453] [2020-12-09 11:20:08,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 11:20:08,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:08,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 11:20:08,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-09 11:20:08,871 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 9 states. [2020-12-09 11:20:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:10,141 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2020-12-09 11:20:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 11:20:10,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-09 11:20:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:10,143 INFO L225 Difference]: With dead ends: 120 [2020-12-09 11:20:10,143 INFO L226 Difference]: Without dead ends: 109 [2020-12-09 11:20:10,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-09 11:20:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-09 11:20:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-12-09 11:20:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 11:20:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2020-12-09 11:20:10,147 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 26 [2020-12-09 11:20:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:10,147 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2020-12-09 11:20:10,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 11:20:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2020-12-09 11:20:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 11:20:10,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:10,148 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] [2020-12-09 11:20:10,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-12-09 11:20:10,349 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:10,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1994202826, now seen corresponding path program 1 times [2020-12-09 11:20:10,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:10,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585565392] [2020-12-09 11:20:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:10,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:20:10,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:10,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:10,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585565392] [2020-12-09 11:20:10,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:10,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:20:10,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378971179] [2020-12-09 11:20:10,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:20:10,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:10,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:20:10,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:20:10,443 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 4 states. [2020-12-09 11:20:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:10,505 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2020-12-09 11:20:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:20:10,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-09 11:20:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:10,506 INFO L225 Difference]: With dead ends: 120 [2020-12-09 11:20:10,506 INFO L226 Difference]: Without dead ends: 103 [2020-12-09 11:20:10,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:20:10,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-09 11:20:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-12-09 11:20:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 11:20:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2020-12-09 11:20:10,510 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 26 [2020-12-09 11:20:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:10,510 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2020-12-09 11:20:10,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:20:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2020-12-09 11:20:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 11:20:10,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:10,511 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] [2020-12-09 11:20:10,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3 [2020-12-09 11:20:10,712 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash 548357897, now seen corresponding path program 1 times [2020-12-09 11:20:10,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:10,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580217973] [2020-12-09 11:20:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:10,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 11:20:10,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:10,804 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:10,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:10,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:10,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:10,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580217973] [2020-12-09 11:20:10,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:10,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-09 11:20:10,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288451609] [2020-12-09 11:20:10,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 11:20:10,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:10,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 11:20:10,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-09 11:20:10,960 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 10 states. [2020-12-09 11:20:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:13,532 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-12-09 11:20:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 11:20:13,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-09 11:20:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:13,533 INFO L225 Difference]: With dead ends: 81 [2020-12-09 11:20:13,533 INFO L226 Difference]: Without dead ends: 70 [2020-12-09 11:20:13,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-12-09 11:20:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-09 11:20:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-09 11:20:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-09 11:20:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-12-09 11:20:13,539 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 27 [2020-12-09 11:20:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:13,539 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-12-09 11:20:13,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 11:20:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-12-09 11:20:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 11:20:13,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:13,540 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] [2020-12-09 11:20:13,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3 [2020-12-09 11:20:13,741 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:13,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:13,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2066405290, now seen corresponding path program 1 times [2020-12-09 11:20:13,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:13,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701415942] [2020-12-09 11:20:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:13,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:20:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:13,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:13,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701415942] [2020-12-09 11:20:13,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:13,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:20:13,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361335760] [2020-12-09 11:20:13,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:20:13,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:13,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:20:13,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:20:13,832 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 4 states. [2020-12-09 11:20:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:13,870 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2020-12-09 11:20:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:20:13,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-12-09 11:20:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:13,871 INFO L225 Difference]: With dead ends: 107 [2020-12-09 11:20:13,871 INFO L226 Difference]: Without dead ends: 88 [2020-12-09 11:20:13,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:20:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-09 11:20:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2020-12-09 11:20:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-09 11:20:13,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-12-09 11:20:13,878 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 27 [2020-12-09 11:20:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:13,878 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-12-09 11:20:13,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:20:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-12-09 11:20:13,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 11:20:13,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:13,879 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] [2020-12-09 11:20:14,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 mathsat -unsat_core_generation=3 [2020-12-09 11:20:14,080 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:14,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1548503636, now seen corresponding path program 1 times [2020-12-09 11:20:14,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:14,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598867950] [2020-12-09 11:20:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 11:20:14,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:14,171 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:14,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:14,186 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:14,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:14,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598867950] [2020-12-09 11:20:14,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:14,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-09 11:20:14,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756838034] [2020-12-09 11:20:14,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 11:20:14,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:14,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 11:20:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-09 11:20:14,392 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 12 states. [2020-12-09 11:20:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:15,737 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-12-09 11:20:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-09 11:20:15,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-09 11:20:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:15,739 INFO L225 Difference]: With dead ends: 193 [2020-12-09 11:20:15,739 INFO L226 Difference]: Without dead ends: 158 [2020-12-09 11:20:15,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2020-12-09 11:20:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-09 11:20:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 43. [2020-12-09 11:20:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 11:20:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-12-09 11:20:15,743 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2020-12-09 11:20:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:15,743 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-12-09 11:20:15,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 11:20:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-12-09 11:20:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 11:20:15,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:15,743 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] [2020-12-09 11:20:15,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3 [2020-12-09 11:20:15,944 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1364791880, now seen corresponding path program 1 times [2020-12-09 11:20:15,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:15,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322216962] [2020-12-09 11:20:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:16,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 11:20:16,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:16,136 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:16,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:16,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:16,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322216962] [2020-12-09 11:20:16,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:16,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-09 11:20:16,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880432037] [2020-12-09 11:20:16,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 11:20:16,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:16,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 11:20:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-09 11:20:16,294 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 10 states. [2020-12-09 11:20:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:17,039 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2020-12-09 11:20:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-09 11:20:17,040 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-12-09 11:20:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:17,040 INFO L225 Difference]: With dead ends: 135 [2020-12-09 11:20:17,040 INFO L226 Difference]: Without dead ends: 111 [2020-12-09 11:20:17,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2020-12-09 11:20:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-09 11:20:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 43. [2020-12-09 11:20:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 11:20:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-12-09 11:20:17,044 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 28 [2020-12-09 11:20:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:17,044 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-12-09 11:20:17,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 11:20:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-12-09 11:20:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 11:20:17,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:17,045 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] [2020-12-09 11:20:17,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 mathsat -unsat_core_generation=3 [2020-12-09 11:20:17,246 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:17,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1106626442, now seen corresponding path program 1 times [2020-12-09 11:20:17,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:17,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947919834] [2020-12-09 11:20:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 23 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:17,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:20:17,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:17,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:17,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947919834] [2020-12-09 11:20:17,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:17,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:20:17,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450539720] [2020-12-09 11:20:17,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:20:17,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:17,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:20:17,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:20:17,422 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-12-09 11:20:17,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:17,450 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-12-09 11:20:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:20:17,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-12-09 11:20:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:17,451 INFO L225 Difference]: With dead ends: 67 [2020-12-09 11:20:17,451 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 11:20:17,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:20:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 11:20:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2020-12-09 11:20:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-09 11:20:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-12-09 11:20:17,454 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 28 [2020-12-09 11:20:17,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:17,454 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-12-09 11:20:17,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:20:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-12-09 11:20:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 11:20:17,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:17,455 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] [2020-12-09 11:20:17,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 mathsat -unsat_core_generation=3 [2020-12-09 11:20:17,656 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash 430789518, now seen corresponding path program 1 times [2020-12-09 11:20:17,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:17,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103495767] [2020-12-09 11:20:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:17,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 11:20:17,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:17,809 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:17,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:17,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:17,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:17,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103495767] [2020-12-09 11:20:17,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:17,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 11:20:17,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670086190] [2020-12-09 11:20:17,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:20:17,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:17,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:20:17,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:20:17,854 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 6 states. [2020-12-09 11:20:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:17,974 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-12-09 11:20:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 11:20:17,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-12-09 11:20:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:17,974 INFO L225 Difference]: With dead ends: 52 [2020-12-09 11:20:17,974 INFO L226 Difference]: Without dead ends: 41 [2020-12-09 11:20:17,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-09 11:20:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-09 11:20:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-09 11:20:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-09 11:20:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-12-09 11:20:17,978 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 32 [2020-12-09 11:20:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:17,978 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-12-09 11:20:17,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:20:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-12-09 11:20:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 11:20:17,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:17,978 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] [2020-12-09 11:20:18,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 mathsat -unsat_core_generation=3 [2020-12-09 11:20:18,180 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1131854096, now seen corresponding path program 1 times [2020-12-09 11:20:18,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:18,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868107397] [2020-12-09 11:20:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 25 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 11:20:18,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:18,312 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:18,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:18,325 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:18,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:18,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868107397] [2020-12-09 11:20:18,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:18,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 11:20:18,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062970172] [2020-12-09 11:20:18,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 11:20:18,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:18,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 11:20:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-09 11:20:18,372 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 8 states. [2020-12-09 11:20:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:18,893 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-12-09 11:20:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 11:20:18,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-09 11:20:18,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:18,894 INFO L225 Difference]: With dead ends: 53 [2020-12-09 11:20:18,894 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 11:20:18,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-09 11:20:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 11:20:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-09 11:20:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 11:20:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-09 11:20:18,897 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2020-12-09 11:20:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:18,897 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-09 11:20:18,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 11:20:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-09 11:20:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-09 11:20:18,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:18,897 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] [2020-12-09 11:20:19,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 mathsat -unsat_core_generation=3 [2020-12-09 11:20:19,098 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:19,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1713269395, now seen corresponding path program 1 times [2020-12-09 11:20:19,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:19,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503555153] [2020-12-09 11:20:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:19,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 11:20:19,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:19,275 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-09 11:20:19,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:19,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:19,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503555153] [2020-12-09 11:20:19,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:19,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 11:20:19,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311858845] [2020-12-09 11:20:19,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 11:20:19,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:19,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 11:20:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 11:20:19,357 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 7 states. [2020-12-09 11:20:20,226 WARN L197 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-12-09 11:20:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:20,294 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-12-09 11:20:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 11:20:20,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-12-09 11:20:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:20,295 INFO L225 Difference]: With dead ends: 71 [2020-12-09 11:20:20,295 INFO L226 Difference]: Without dead ends: 61 [2020-12-09 11:20:20,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-09 11:20:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-09 11:20:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-12-09 11:20:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 11:20:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-12-09 11:20:20,298 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 33 [2020-12-09 11:20:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:20,299 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-12-09 11:20:20,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 11:20:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-12-09 11:20:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-09 11:20:20,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:20,299 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] [2020-12-09 11:20:20,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 mathsat -unsat_core_generation=3 [2020-12-09 11:20:20,500 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:20,501 INFO L82 PathProgramCache]: Analyzing trace with hash -26785796, now seen corresponding path program 1 times [2020-12-09 11:20:20,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:20,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918945965] [2020-12-09 11:20:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 27 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:20,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 11:20:20,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:20,718 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-09 11:20:20,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 11:20:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:20,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:20,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918945965] [2020-12-09 11:20:20,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:20,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 11:20:20,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606441238] [2020-12-09 11:20:20,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 11:20:20,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:20,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 11:20:20,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-09 11:20:20,838 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 8 states. [2020-12-09 11:20:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:21,107 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-12-09 11:20:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 11:20:21,107 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-12-09 11:20:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:21,107 INFO L225 Difference]: With dead ends: 59 [2020-12-09 11:20:21,108 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 11:20:21,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-09 11:20:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 11:20:21,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2020-12-09 11:20:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 11:20:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-09 11:20:21,111 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-12-09 11:20:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:21,111 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-09 11:20:21,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 11:20:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-09 11:20:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-09 11:20:21,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:20:21,111 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] [2020-12-09 11:20:21,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 mathsat -unsat_core_generation=3 [2020-12-09 11:20:21,312 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:20:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:20:21,313 INFO L82 PathProgramCache]: Analyzing trace with hash 739407273, now seen corresponding path program 1 times [2020-12-09 11:20:21,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:20:21,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038181708] [2020-12-09 11:20:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2020-12-09 11:20:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:20:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:20:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:20:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:20:21,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:20:21,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038181708] [2020-12-09 11:20:21,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:20:21,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:20:21,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081227615] [2020-12-09 11:20:21,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:20:21,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:20:21,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:20:21,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:20:21,418 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2020-12-09 11:20:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:20:21,441 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-09 11:20:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:20:21,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-12-09 11:20:21,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:20:21,442 INFO L225 Difference]: With dead ends: 39 [2020-12-09 11:20:21,442 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 11:20:21,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:20:21,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 11:20:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 11:20:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 11:20:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 11:20:21,442 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-12-09 11:20:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:20:21,442 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 11:20:21,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:20:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 11:20:21,443 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 11:20:21,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 mathsat -unsat_core_generation=3 [2020-12-09 11:20:21,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 11:20:21,850 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 109 [2020-12-09 11:20:22,740 WARN L197 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2020-12-09 11:20:23,174 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 31 [2020-12-09 11:20:23,444 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-12-09 11:20:23,603 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2020-12-09 11:20:23,924 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-12-09 11:20:24,037 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 16 [2020-12-09 11:20:24,462 WARN L197 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-12-09 11:20:24,588 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-12-09 11:20:24,716 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 82) no Hoare annotation was computed. [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point L36(lines 36 42) no Hoare annotation was computed. [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point L69-2(line 69) no Hoare annotation was computed. [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point L36-1(lines 36 42) no Hoare annotation was computed. [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point L69-3(lines 69 70) no Hoare annotation was computed. [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point L69-5(lines 69 85) no Hoare annotation was computed. [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point L69-7(lines 69 85) no Hoare annotation was computed. [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 11:20:24,753 INFO L262 CegarLoopResult]: For program point L53(line 53) no Hoare annotation was computed. [2020-12-09 11:20:24,754 INFO L262 CegarLoopResult]: For program point L53-2(line 53) no Hoare annotation was computed. [2020-12-09 11:20:24,754 INFO L258 CegarLoopResult]: At program point L53-3(lines 45 54) the Hoare annotation is: (let ((.cse1 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (let ((.cse2 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0)) (.cse0 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0))) (.cse3 (not .cse1)) (.cse4 (= ULTIMATE.start_main_~y~0 |ULTIMATE.start_fmax_float_#res|))) (or (and (not (fp.eq .cse0 .cse0)) (not (fp.eq ULTIMATE.start___fpclassify_float_~x ULTIMATE.start___fpclassify_float_~x)) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) .cse1 (= ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) .cse2 (= ULTIMATE.start_main_~x~0 |ULTIMATE.start_fmax_float_#res|)) (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) .cse2 .cse3 .cse4) (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (= ULTIMATE.start_fmax_float_~y ULTIMATE.start___fpclassify_float_~x) (or (= ULTIMATE.start_fmax_float_~y (fp (_ bv0 1) (_ bv0 8) (_ bv0 23))) (= ULTIMATE.start_fmax_float_~y (fp (_ bv1 1) (_ bv0 8) (_ bv0 23)))) .cse2 (= ULTIMATE.start_fmax_float_~y .cse0) .cse3 .cse4)))) [2020-12-09 11:20:24,754 INFO L262 CegarLoopResult]: For program point L70(line 70) no Hoare annotation was computed. [2020-12-09 11:20:24,754 INFO L262 CegarLoopResult]: For program point L70-2(line 70) no Hoare annotation was computed. [2020-12-09 11:20:24,754 INFO L265 CegarLoopResult]: At program point L87(lines 59 88) the Hoare annotation is: true [2020-12-09 11:20:24,754 INFO L262 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-12-09 11:20:24,754 INFO L262 CegarLoopResult]: For program point L39(lines 39 42) no Hoare annotation was computed. [2020-12-09 11:20:24,754 INFO L262 CegarLoopResult]: For program point L39-1(lines 39 42) no Hoare annotation was computed. [2020-12-09 11:20:24,754 INFO L262 CegarLoopResult]: For program point L81(line 81) no Hoare annotation was computed. [2020-12-09 11:20:24,754 INFO L262 CegarLoopResult]: For program point L81-2(lines 81 84) no Hoare annotation was computed. [2020-12-09 11:20:24,754 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 11:20:24,755 INFO L258 CegarLoopResult]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (or (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0) (and (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not .cse0)))) [2020-12-09 11:20:24,755 INFO L258 CegarLoopResult]: At program point L57-1(line 57) the Hoare annotation is: (and (let ((.cse0 (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0))) (or (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0) (and (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not .cse0)))) |ULTIMATE.start_main_#t~short15| (not (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) [2020-12-09 11:20:24,755 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 76) no Hoare annotation was computed. [2020-12-09 11:20:24,755 INFO L258 CegarLoopResult]: At program point L57-2(line 57) the Hoare annotation is: (let ((.cse0 (not |ULTIMATE.start_main_#t~short19|)) (.cse1 (not |ULTIMATE.start_main_#t~short15|)) (.cse2 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (or (and .cse0 .cse1 (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (not .cse2)) (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0 .cse1 .cse2))) [2020-12-09 11:20:24,755 INFO L258 CegarLoopResult]: At program point L57-3(line 57) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short18| (let ((.cse0 (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0))) (or (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0) (and (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not .cse0)))) (not |ULTIMATE.start_main_#t~short19|) (not |ULTIMATE.start_main_#t~short15|) (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0)) [2020-12-09 11:20:24,755 INFO L258 CegarLoopResult]: At program point L57-4(line 57) the Hoare annotation is: (let ((.cse1 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0)) (.cse0 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0))) (or (and (= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~res~0) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) .cse0 (not .cse1) (= ULTIMATE.start_main_~y~0 |ULTIMATE.start_fmax_float_#res|)) (and (not (let ((.cse2 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))) (fp.eq .cse2 .cse2))) (not (fp.eq ULTIMATE.start___fpclassify_float_~x ULTIMATE.start___fpclassify_float_~x)) (= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~res~0) (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) .cse1 (= ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) .cse0 (= ULTIMATE.start_main_~x~0 |ULTIMATE.start_fmax_float_#res|)))) [2020-12-09 11:20:24,755 INFO L258 CegarLoopResult]: At program point L57-5(line 57) the Hoare annotation is: (and (= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~res~0) (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) |ULTIMATE.start_main_#t~short23| (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0) (not (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0)) (= ULTIMATE.start_main_~y~0 |ULTIMATE.start_fmax_float_#res|)) [2020-12-09 11:20:24,755 INFO L258 CegarLoopResult]: At program point L57-6(line 57) the Hoare annotation is: (let ((.cse0 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (or (and (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not .cse0)) (and (not (let ((.cse1 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))) (fp.eq .cse1 .cse1))) (not (fp.eq ULTIMATE.start___fpclassify_float_~x ULTIMATE.start___fpclassify_float_~x)) (= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~res~0) (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0 (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (= ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0) (= ULTIMATE.start_main_~x~0 |ULTIMATE.start_fmax_float_#res|)))) [2020-12-09 11:20:24,755 INFO L258 CegarLoopResult]: At program point L57-7(line 57) the Hoare annotation is: (and (not (let ((.cse0 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))) (fp.eq .cse0 .cse0))) (not (fp.eq ULTIMATE.start___fpclassify_float_~x ULTIMATE.start___fpclassify_float_~x)) (= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~res~0) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (= ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) (not (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~x~0 |ULTIMATE.start_fmax_float_#res|)) [2020-12-09 11:20:24,755 INFO L262 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-12-09 11:20:24,755 INFO L262 CegarLoopResult]: For program point L33(lines 33 42) no Hoare annotation was computed. [2020-12-09 11:20:24,756 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 11:20:24,756 INFO L262 CegarLoopResult]: For program point L33-1(lines 33 42) no Hoare annotation was computed. [2020-12-09 11:20:24,756 INFO L262 CegarLoopResult]: For program point L25-1(lines 25 29) no Hoare annotation was computed. [2020-12-09 11:20:24,756 INFO L258 CegarLoopResult]: At program point L25-2(lines 25 29) the Hoare annotation is: (let ((.cse1 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0)) (.cse0 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0))) (or (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) .cse0 (not .cse1)) (and (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) .cse1 (= ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) (= ULTIMATE.start_fmax_float_~x ULTIMATE.start___fpclassify_float_~x) .cse0))) [2020-12-09 11:20:24,756 INFO L262 CegarLoopResult]: For program point L25-3(lines 22 43) no Hoare annotation was computed. [2020-12-09 11:20:24,756 INFO L262 CegarLoopResult]: For program point L25-5(lines 25 29) no Hoare annotation was computed. [2020-12-09 11:20:24,756 INFO L258 CegarLoopResult]: At program point L25-6(lines 25 29) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start___fpclassify_float_~x)) (.cse2 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0)) (.cse1 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0))) (or (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0 (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) .cse1 (not .cse2)) (and .cse0 (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) .cse2 (= ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) .cse1))) [2020-12-09 11:20:24,756 INFO L262 CegarLoopResult]: For program point L25-7(lines 22 43) no Hoare annotation was computed. [2020-12-09 11:20:24,756 INFO L262 CegarLoopResult]: For program point L50(lines 50 52) no Hoare annotation was computed. [2020-12-09 11:20:24,756 INFO L262 CegarLoopResult]: For program point L75(line 75) no Hoare annotation was computed. [2020-12-09 11:20:24,756 INFO L258 CegarLoopResult]: At program point L42(lines 22 43) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0))) (or (and (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0 (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (not (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (let ((.cse1 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))) (and (= ULTIMATE.start_fmax_float_~x .cse1) (let ((.cse2 (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)) (.cse3 (fp.eq .cse1 .cse1))) (or (and (not (= (bvadd ULTIMATE.start___fpclassify_float_~w~0 (_ bv2147483648 32)) (_ bv0 32))) (= (_ bv1 32) |ULTIMATE.start___fpclassify_float_#res|) (not (bvule ULTIMATE.start___fpclassify_float_~w~0 (_ bv2139095039 32))) (or (not (bvuge ULTIMATE.start___fpclassify_float_~w~0 (_ bv2147483649 32))) (not (bvule ULTIMATE.start___fpclassify_float_~w~0 (_ bv2155872255 32)))) .cse2 .cse0 (or (not (bvuge ULTIMATE.start___fpclassify_float_~w~0 (_ bv2155872256 32))) (not (bvule ULTIMATE.start___fpclassify_float_~w~0 (_ bv4286578687 32)))) .cse3) (and .cse2 (or (= (_ bv3 32) |ULTIMATE.start___fpclassify_float_#res|) (= (_ bv4 32) |ULTIMATE.start___fpclassify_float_#res|) (= (_ bv2 32) |ULTIMATE.start___fpclassify_float_#res|)) .cse0 .cse3))) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (= ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) (= ULTIMATE.start_fmax_float_~x ULTIMATE.start___fpclassify_float_~x))))) [2020-12-09 11:20:24,757 INFO L258 CegarLoopResult]: At program point L42-1(lines 22 43) the Hoare annotation is: (let ((.cse8 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (let ((.cse4 (or (= (_ bv4 32) |ULTIMATE.start___fpclassify_float_#res|) (= (_ bv2 32) |ULTIMATE.start___fpclassify_float_#res|))) (.cse0 (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x))) (.cse5 (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|)) (.cse1 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start___fpclassify_float_~x)) (.cse6 (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (.cse7 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0)) (.cse2 (= ULTIMATE.start_fmax_float_~y (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))) (.cse3 (not .cse8))) (or (and (or (and .cse0 (= (_ bv3 32) |ULTIMATE.start___fpclassify_float_#res|) .cse1 .cse2 .cse3) (and .cse0 .cse1 .cse2 .cse3 .cse4)) .cse5 .cse6 .cse7) (and .cse0 .cse1 (or (= ULTIMATE.start_fmax_float_~y (fp (_ bv0 1) (_ bv0 8) (_ bv0 23))) (= ULTIMATE.start_fmax_float_~y (fp (_ bv1 1) (_ bv0 8) (_ bv0 23)))) .cse7 .cse2 .cse3 .cse4) (and .cse1 (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) .cse8 (= ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|) .cse7 .cse2) (and .cse0 (= (_ bv1 32) |ULTIMATE.start___fpclassify_float_#res|) .cse5 .cse1 .cse6 .cse7 .cse2 .cse3)))) [2020-12-09 11:20:24,757 INFO L262 CegarLoopResult]: For program point L75-2(lines 75 78) no Hoare annotation was computed. [2020-12-09 11:20:24,757 INFO L262 CegarLoopResult]: For program point L76(line 76) no Hoare annotation was computed. [2020-12-09 11:20:24,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:20:24 BoogieIcfgContainer [2020-12-09 11:20:24,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:20:24,777 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:20:24,777 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:20:24,777 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:20:24,778 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:20:00" (3/4) ... [2020-12-09 11:20:24,780 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 11:20:24,788 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2020-12-09 11:20:24,788 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 11:20:24,789 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 11:20:24,789 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 11:20:24,805 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0bv32 == \result && ~fp.eq~FLOAT(x, x)) || (1bv32 == \result && !~fp.eq~FLOAT(x, x)) [2020-12-09 11:20:24,805 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((0bv32 == \result && ~fp.eq~FLOAT(y, y)) || (1bv32 == \result && !~fp.eq~FLOAT(y, y))) && aux-isnan_float(x) && !isnan_float(y)-aux) && !~fp.eq~FLOAT(x, x) [2020-12-09 11:20:24,805 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux && !aux-isnan_float(x) && !isnan_float(y)-aux) && 1bv32 == \result) && !~fp.eq~FLOAT(y, y)) && !~fp.eq~FLOAT(x, x)) || (((0bv32 == \result && !aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux) && !aux-isnan_float(x) && !isnan_float(y)-aux) && ~fp.eq~FLOAT(x, x)) [2020-12-09 11:20:24,806 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((aux-!isnan_float(x) && isnan_float(y)-aux && ((0bv32 == \result && ~fp.eq~FLOAT(y, y)) || (1bv32 == \result && !~fp.eq~FLOAT(y, y)))) && !aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux) && !aux-isnan_float(x) && !isnan_float(y)-aux) && ~fp.eq~FLOAT(x, x) [2020-12-09 11:20:24,806 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!~fp.eq~FLOAT(x, x) && 0bv32 == \result) && ~fp.eq~FLOAT(y, y)) && y == y) && !~fp.eq~FLOAT(x, x)) || (((((1bv32 == \result && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && x == x) && x == x) && y == y) [2020-12-09 11:20:24,806 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!~fp.eq~FLOAT(x, x) && 0bv32 == \result) && y == y) && ~fp.eq~FLOAT(y, y)) && !~fp.eq~FLOAT(x, x)) || ((((x == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && ((((((((!(~bvadd64(w, 2147483648bv32) == 0bv32) && 1bv32 == \result) && !~bvule32(w, 2139095039bv32)) && (!~bvuge32(w, 2147483649bv32) || !~bvule32(w, 2155872255bv32))) && 1bv32 == \result) && y == y) && (!~bvuge32(w, 2155872256bv32) || !~bvule32(w, 4286578687bv32))) && ~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) || (((1bv32 == \result && ((3bv32 == \result || 4bv32 == \result) || 2bv32 == \result)) && y == y) && ~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))))) && !~fp.eq~FLOAT(y, y)) && x == x) && x == x) [2020-12-09 11:20:24,806 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((!~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && 1bv32 == \result) && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && x == x) && y == y) && x == \result) || ((((0bv32 == \result && ~fp.eq~FLOAT(y, y)) && y == y) && !~fp.eq~FLOAT(x, x)) && y == \result)) || ((((((!~fp.eq~FLOAT(x, x) && y == x) && (y == ~fp~LONGDOUBLE(0bv1, 0bv8, 0bv23) || y == ~fp~LONGDOUBLE(1bv1, 0bv8, 0bv23))) && y == y) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && y == \result) [2020-12-09 11:20:24,806 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((!~fp.eq~FLOAT(x, x) && 0bv32 == \result) && y == x) && ~fp.eq~FLOAT(y, y)) && y == y) && !~fp.eq~FLOAT(x, x)) || (((((y == x && 1bv32 == \result) && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && x == x) && y == y) [2020-12-09 11:20:24,806 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((y == res && 1bv32 == \result) && ~fp.eq~FLOAT(y, y)) && y == y) && !~fp.eq~FLOAT(x, x)) && y == \result) || ((((((((!~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && x == res) && 0bv32 == \result) && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && x == x) && y == y) && x == \result) [2020-12-09 11:20:24,807 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((!~fp.eq~FLOAT(x, x) && 3bv32 == \result) && y == x) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) || ((((!~fp.eq~FLOAT(x, x) && y == x) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && (4bv32 == \result || 2bv32 == \result))) && 0bv32 == \result) && ~fp.eq~FLOAT(y, y)) && y == y) || ((((((!~fp.eq~FLOAT(x, x) && y == x) && (y == ~fp~LONGDOUBLE(0bv1, 0bv8, 0bv23) || y == ~fp~LONGDOUBLE(1bv1, 0bv8, 0bv23))) && y == y) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && (4bv32 == \result || 2bv32 == \result))) || (((((((y == x && 1bv32 == \result) && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && x == x) && 0bv32 == \result) && y == y) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) || (((((((!~fp.eq~FLOAT(x, x) && 1bv32 == \result) && 0bv32 == \result) && y == x) && ~fp.eq~FLOAT(y, y)) && y == y) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) [2020-12-09 11:20:24,807 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((y == res && 0bv32 == \result) && aux-isnan_float(x) && !isnan_float(y)-aux) && ~fp.eq~FLOAT(y, y)) && y == y) && !~fp.eq~FLOAT(x, x)) && y == \result [2020-12-09 11:20:24,807 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (1bv32 == \result && !~fp.eq~FLOAT(x, x)) || ((((((((!~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && x == res) && 0bv32 == \result) && ~fp.eq~FLOAT(x, x)) && !~fp.eq~FLOAT(y, y)) && x == x) && y == y) && x == \result) [2020-12-09 11:20:24,807 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((!~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && x == res) && 1bv32 == \result) && ~fp.eq~FLOAT(x, x)) && !~fp.eq~FLOAT(y, y)) && x == x) && !~fp.eq~FLOAT(y, y)) && x == \result [2020-12-09 11:20:24,822 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2dea7eb3-140f-4549-9375-067b728d252d/bin/utaipan/witness.graphml [2020-12-09 11:20:24,822 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:20:24,823 INFO L168 Benchmark]: Toolchain (without parser) took 24991.71 ms. Allocated memory was 60.8 MB in the beginning and 92.3 MB in the end (delta: 31.5 MB). Free memory was 40.6 MB in the beginning and 28.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 42.2 MB. Max. memory is 16.1 GB. [2020-12-09 11:20:24,824 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 43.8 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:20:24,824 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.28 ms. Allocated memory is still 60.8 MB. Free memory was 40.4 MB in the beginning and 45.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 11:20:24,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.60 ms. Allocated memory is still 60.8 MB. Free memory was 45.1 MB in the beginning and 43.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:20:24,825 INFO L168 Benchmark]: Boogie Preprocessor took 24.68 ms. Allocated memory is still 60.8 MB. Free memory was 43.0 MB in the beginning and 41.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:20:24,825 INFO L168 Benchmark]: RCFGBuilder took 417.99 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 41.4 MB in the beginning and 50.6 MB in the end (delta: -9.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 16.1 GB. [2020-12-09 11:20:24,826 INFO L168 Benchmark]: TraceAbstraction took 24274.84 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 49.9 MB in the beginning and 33.2 MB in the end (delta: 16.7 MB). Peak memory consumption was 46.0 MB. Max. memory is 16.1 GB. [2020-12-09 11:20:24,826 INFO L168 Benchmark]: Witness Printer took 45.32 ms. Allocated memory is still 92.3 MB. Free memory was 33.2 MB in the beginning and 28.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 11:20:24,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 43.8 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 185.28 ms. Allocated memory is still 60.8 MB. Free memory was 40.4 MB in the beginning and 45.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.60 ms. Allocated memory is still 60.8 MB. Free memory was 45.1 MB in the beginning and 43.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.68 ms. Allocated memory is still 60.8 MB. Free memory was 43.0 MB in the beginning and 41.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 417.99 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 41.4 MB in the beginning and 50.6 MB in the end (delta: -9.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24274.84 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 49.9 MB in the beginning and 33.2 MB in the end (delta: 16.7 MB). Peak memory consumption was 46.0 MB. Max. memory is 16.1 GB. * Witness Printer took 45.32 ms. Allocated memory is still 92.3 MB. Free memory was 33.2 MB in the beginning and 28.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 82]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 76]: 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 2 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: ((((((((!~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && 1bv32 == \result) && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && x == x) && y == y) && x == \result) || ((((0bv32 == \result && ~fp.eq~FLOAT(y, y)) && y == y) && !~fp.eq~FLOAT(x, x)) && y == \result)) || ((((((!~fp.eq~FLOAT(x, x) && y == x) && (y == ~fp~LONGDOUBLE(0bv1, 0bv8, 0bv23) || y == ~fp~LONGDOUBLE(1bv1, 0bv8, 0bv23))) && y == y) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && y == \result) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((((((!~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && x == res) && 1bv32 == \result) && ~fp.eq~FLOAT(x, x)) && !~fp.eq~FLOAT(y, y)) && x == x) && !~fp.eq~FLOAT(y, y)) && x == \result - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (1bv32 == \result && !~fp.eq~FLOAT(x, x)) || ((((((((!~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && x == res) && 0bv32 == \result) && ~fp.eq~FLOAT(x, x)) && !~fp.eq~FLOAT(y, y)) && x == x) && y == y) && x == \result) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((((!~fp.eq~FLOAT(x, x) && 0bv32 == \result) && y == x) && ~fp.eq~FLOAT(y, y)) && y == y) && !~fp.eq~FLOAT(x, x)) || (((((y == x && 1bv32 == \result) && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && x == x) && y == y) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((((((!~fp.eq~FLOAT(x, x) && 3bv32 == \result) && y == x) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) || ((((!~fp.eq~FLOAT(x, x) && y == x) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && (4bv32 == \result || 2bv32 == \result))) && 0bv32 == \result) && ~fp.eq~FLOAT(y, y)) && y == y) || ((((((!~fp.eq~FLOAT(x, x) && y == x) && (y == ~fp~LONGDOUBLE(0bv1, 0bv8, 0bv23) || y == ~fp~LONGDOUBLE(1bv1, 0bv8, 0bv23))) && y == y) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && (4bv32 == \result || 2bv32 == \result))) || (((((((y == x && 1bv32 == \result) && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && x == x) && 0bv32 == \result) && y == y) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) || (((((((!~fp.eq~FLOAT(x, x) && 1bv32 == \result) && 0bv32 == \result) && y == x) && ~fp.eq~FLOAT(y, y)) && y == y) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((((y == res && 0bv32 == \result) && aux-isnan_float(x) && !isnan_float(y)-aux) && ~fp.eq~FLOAT(y, y)) && y == y) && !~fp.eq~FLOAT(x, x)) && y == \result - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((!~fp.eq~FLOAT(x, x) && 0bv32 == \result) && y == y) && ~fp.eq~FLOAT(y, y)) && !~fp.eq~FLOAT(x, x)) || ((((x == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && ((((((((!(~bvadd64(w, 2147483648bv32) == 0bv32) && 1bv32 == \result) && !~bvule32(w, 2139095039bv32)) && (!~bvuge32(w, 2147483649bv32) || !~bvule32(w, 2155872255bv32))) && 1bv32 == \result) && y == y) && (!~bvuge32(w, 2155872256bv32) || !~bvule32(w, 4286578687bv32))) && ~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) || (((1bv32 == \result && ((3bv32 == \result || 4bv32 == \result) || 2bv32 == \result)) && y == y) && ~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))))) && !~fp.eq~FLOAT(y, y)) && x == x) && x == x) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((((y == res && 1bv32 == \result) && ~fp.eq~FLOAT(y, y)) && y == y) && !~fp.eq~FLOAT(x, x)) && y == \result) || ((((((((!~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && !~fp.eq~FLOAT(x, x)) && x == res) && 0bv32 == \result) && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && x == x) && y == y) && x == \result) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((aux-!isnan_float(x) && isnan_float(y)-aux && ((0bv32 == \result && ~fp.eq~FLOAT(y, y)) || (1bv32 == \result && !~fp.eq~FLOAT(y, y)))) && !aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux) && !aux-isnan_float(x) && !isnan_float(y)-aux) && ~fp.eq~FLOAT(x, x) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: ((((!aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux && !aux-isnan_float(x) && !isnan_float(y)-aux) && 1bv32 == \result) && !~fp.eq~FLOAT(y, y)) && !~fp.eq~FLOAT(x, x)) || (((0bv32 == \result && !aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux) && !aux-isnan_float(x) && !isnan_float(y)-aux) && ~fp.eq~FLOAT(x, x)) - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((((!~fp.eq~FLOAT(x, x) && 0bv32 == \result) && ~fp.eq~FLOAT(y, y)) && y == y) && !~fp.eq~FLOAT(x, x)) || (((((1bv32 == \result && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && x == x) && x == x) && y == y) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((0bv32 == \result && ~fp.eq~FLOAT(y, y)) || (1bv32 == \result && !~fp.eq~FLOAT(y, y))) && aux-isnan_float(x) && !isnan_float(y)-aux) && !~fp.eq~FLOAT(x, x) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (0bv32 == \result && ~fp.eq~FLOAT(x, x)) || (1bv32 == \result && !~fp.eq~FLOAT(x, x)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.0s, OverallIterations: 27, TraceHistogramMax: 1, AutomataDifference: 10.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1674 SDtfs, 1873 SDslu, 4718 SDs, 0 SdLazy, 1815 SolverSat, 198 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 785 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 27 MinimizatonAttempts, 644 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 14 PreInvPairs, 49 NumberOfFragments, 750 HoareAnnotationTreeSize, 14 FomulaSimplifications, 7499146 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 14 FomulaSimplificationsInter, 67384 FormulaSimplificationTreeSizeReductionInter, 2.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 685 NumberOfCodeBlocks, 685 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 658 ConstructedInterpolants, 0 QuantifiedInterpolants, 67620 SizeOfPredicates, 166 NumberOfNonLiveVariables, 2360 ConjunctsInSsa, 230 ConjunctsInUnsatCore, 27 InterpolantComputations, 27 PerfectInterpolantSequences, 0/0 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...