./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark10_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark10_conjunctive.i -s /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash edd6561cca2d352ad9794df9d30edf5094107348 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/config using search string *Overflow*32bit*_Bitvector*.epf No suitable settings file found using Overflow*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1a921e04 --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:56:57,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:56:57,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:56:57,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:56:57,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:56:57,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:56:57,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:56:57,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:56:57,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:56:57,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:56:57,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:56:57,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:56:57,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:56:57,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:56:57,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:56:57,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:56:57,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:56:57,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:56:57,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:56:57,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:56:57,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:56:57,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:56:57,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:56:57,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:56:57,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:56:57,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:56:57,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:56:57,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:56:57,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:56:57,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:56:57,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:56:57,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:56:57,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:56:57,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:56:57,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:56:57,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:56:57,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:56:57,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:56:57,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:56:57,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:56:57,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:56:57,510 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2020-11-30 01:56:57,556 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:56:57,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:56:57,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:56:57,558 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:56:57,558 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:56:57,559 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:56:57,559 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:56:57,559 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:56:57,559 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:56:57,560 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:56:57,560 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:56:57,560 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:56:57,560 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:56:57,561 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:56:57,561 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:56:57,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:56:57,562 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:56:57,562 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:56:57,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:56:57,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:56:57,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:56:57,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:56:57,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:56:57,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:56:57,564 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-30 01:56:57,564 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:56:57,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:56:57,565 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:56:57,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:56:57,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:56:57,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:56:57,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:56:57,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:56:57,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:56:57,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:56:57,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:56:57,567 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:56:57,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:56:57,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:56:57,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:56:57,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:56:57,568 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_03d5ec2c-336d-408e-aa20-cdfb9ce04600/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd6561cca2d352ad9794df9d30edf5094107348 [2020-11-30 01:56:57,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:56:57,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:56:57,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:56:57,907 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:56:57,909 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:56:57,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/../../sv-benchmarks/c/loop-zilu/benchmark10_conjunctive.i [2020-11-30 01:56:58,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/data/ca82837ff/6b8e1194ded24cc1a1d42ab1dd60f17c/FLAGa8e4205f7 [2020-11-30 01:56:58,537 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:56:58,538 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/sv-benchmarks/c/loop-zilu/benchmark10_conjunctive.i [2020-11-30 01:56:58,544 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/data/ca82837ff/6b8e1194ded24cc1a1d42ab1dd60f17c/FLAGa8e4205f7 [2020-11-30 01:56:58,911 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/data/ca82837ff/6b8e1194ded24cc1a1d42ab1dd60f17c [2020-11-30 01:56:58,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:56:58,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:56:58,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:56:58,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:56:58,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:56:58,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:56:58" (1/1) ... [2020-11-30 01:56:58,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a7b3361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:58, skipping insertion in model container [2020-11-30 01:56:58,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:56:58" (1/1) ... [2020-11-30 01:56:58,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:56:58,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:56:59,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:56:59,172 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:56:59,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:56:59,226 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:56:59,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59 WrapperNode [2020-11-30 01:56:59,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:56:59,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:56:59,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:56:59,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:56:59,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (1/1) ... [2020-11-30 01:56:59,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (1/1) ... [2020-11-30 01:56:59,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:56:59,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:56:59,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:56:59,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:56:59,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (1/1) ... [2020-11-30 01:56:59,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (1/1) ... [2020-11-30 01:56:59,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (1/1) ... [2020-11-30 01:56:59,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (1/1) ... [2020-11-30 01:56:59,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (1/1) ... [2020-11-30 01:56:59,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (1/1) ... [2020-11-30 01:56:59,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (1/1) ... [2020-11-30 01:56:59,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:56:59,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:56:59,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:56:59,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:56:59,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/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 [2020-11-30 01:56:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:56:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:56:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:56:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:56:59,854 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:56:59,854 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 01:56:59,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:56:59 BoogieIcfgContainer [2020-11-30 01:56:59,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:56:59,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:56:59,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:56:59,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:56:59,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:56:58" (1/3) ... [2020-11-30 01:56:59,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a70daa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:56:59, skipping insertion in model container [2020-11-30 01:56:59,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:56:59" (2/3) ... [2020-11-30 01:56:59,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a70daa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:56:59, skipping insertion in model container [2020-11-30 01:56:59,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:56:59" (3/3) ... [2020-11-30 01:56:59,869 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark10_conjunctive.i [2020-11-30 01:56:59,882 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:56:59,887 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-30 01:56:59,904 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-30 01:56:59,929 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:56:59,929 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:56:59,929 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:56:59,930 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:56:59,930 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:56:59,930 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:56:59,930 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:56:59,930 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:56:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-30 01:56:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:56:59,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:56:59,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:56:59,948 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:56:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:56:59,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2420311, now seen corresponding path program 1 times [2020-11-30 01:56:59,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:56:59,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746362900] [2020-11-30 01:56:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:00,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746362900] [2020-11-30 01:57:00,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:00,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:57:00,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362036149] [2020-11-30 01:57:00,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:57:00,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:00,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:57:00,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:00,174 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-11-30 01:57:00,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:00,268 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-30 01:57:00,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:57:00,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 01:57:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:00,278 INFO L225 Difference]: With dead ends: 22 [2020-11-30 01:57:00,278 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 01:57:00,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 01:57:00,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-11-30 01:57:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 01:57:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-30 01:57:00,317 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 4 [2020-11-30 01:57:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:00,318 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-30 01:57:00,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:57:00,318 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-30 01:57:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:57:00,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:00,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:57:00,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:57:00,320 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:00,322 INFO L82 PathProgramCache]: Analyzing trace with hash 75029691, now seen corresponding path program 1 times [2020-11-30 01:57:00,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:00,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173463767] [2020-11-30 01:57:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:00,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173463767] [2020-11-30 01:57:00,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:00,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:57:00,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149802797] [2020-11-30 01:57:00,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:57:00,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:00,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:57:00,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:00,380 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2020-11-30 01:57:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:00,461 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-30 01:57:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:57:00,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 01:57:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:00,463 INFO L225 Difference]: With dead ends: 16 [2020-11-30 01:57:00,463 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 01:57:00,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 01:57:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-30 01:57:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 01:57:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-30 01:57:00,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2020-11-30 01:57:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:00,470 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-30 01:57:00,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:57:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-30 01:57:00,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:57:00,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:00,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:57:00,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:57:00,476 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:00,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1969046823, now seen corresponding path program 1 times [2020-11-30 01:57:00,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:00,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347743473] [2020-11-30 01:57:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:00,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347743473] [2020-11-30 01:57:00,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:00,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:57:00,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575892914] [2020-11-30 01:57:00,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:57:00,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:00,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:57:00,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:00,576 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 3 states. [2020-11-30 01:57:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:00,616 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-11-30 01:57:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:57:00,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-30 01:57:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:00,618 INFO L225 Difference]: With dead ends: 18 [2020-11-30 01:57:00,618 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 01:57:00,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 01:57:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-11-30 01:57:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-30 01:57:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-30 01:57:00,624 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 6 [2020-11-30 01:57:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:00,625 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-30 01:57:00,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:57:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-30 01:57:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:57:00,626 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:00,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:57:00,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:57:00,627 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash -910909315, now seen corresponding path program 1 times [2020-11-30 01:57:00,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:00,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288479368] [2020-11-30 01:57:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:00,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288479368] [2020-11-30 01:57:00,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:00,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:57:00,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145780389] [2020-11-30 01:57:00,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:57:00,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:00,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:57:00,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:00,707 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-11-30 01:57:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:00,752 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-30 01:57:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:57:00,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 01:57:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:00,754 INFO L225 Difference]: With dead ends: 16 [2020-11-30 01:57:00,754 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 01:57:00,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 01:57:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-30 01:57:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 01:57:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-30 01:57:00,759 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2020-11-30 01:57:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:00,760 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-30 01:57:00,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:57:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-30 01:57:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:57:00,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:00,763 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:57:00,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:57:00,766 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:00,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1295968864, now seen corresponding path program 1 times [2020-11-30 01:57:00,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:00,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219220470] [2020-11-30 01:57:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:00,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219220470] [2020-11-30 01:57:00,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4753241] [2020-11-30 01:57:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:57:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:00,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:57:00,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:57:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:01,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:57:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:01,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086849339] [2020-11-30 01:57:01,138 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:57:01,138 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:57:01,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:57:01,149 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:57:01,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:57:01,983 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:57:02,164 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 26 [2020-11-30 01:57:02,331 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-11-30 01:57:02,758 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-11-30 01:57:03,087 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-11-30 01:57:03,436 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-11-30 01:57:03,792 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:57:03,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:57:03,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2020-11-30 01:57:03,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107612563] [2020-11-30 01:57:03,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:57:03,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:03,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:57:03,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:57:03,795 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2020-11-30 01:57:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:04,088 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-11-30 01:57:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:57:04,089 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-11-30 01:57:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:04,090 INFO L225 Difference]: With dead ends: 30 [2020-11-30 01:57:04,090 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 01:57:04,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-11-30 01:57:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 01:57:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-11-30 01:57:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:57:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-30 01:57:04,096 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 10 [2020-11-30 01:57:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:04,096 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-30 01:57:04,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:57:04,097 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-30 01:57:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:57:04,098 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:04,098 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:57:04,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:57:04,325 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1520329070, now seen corresponding path program 1 times [2020-11-30 01:57:04,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:04,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466968658] [2020-11-30 01:57:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:04,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466968658] [2020-11-30 01:57:04,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:04,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:57:04,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619239473] [2020-11-30 01:57:04,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:57:04,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:04,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:57:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:57:04,413 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-11-30 01:57:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:04,484 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-11-30 01:57:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:57:04,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:57:04,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:04,487 INFO L225 Difference]: With dead ends: 25 [2020-11-30 01:57:04,487 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 01:57:04,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:57:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 01:57:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-30 01:57:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:57:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-30 01:57:04,494 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2020-11-30 01:57:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:04,494 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-30 01:57:04,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:57:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-30 01:57:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:57:04,496 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:04,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 01:57:04,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-30 01:57:04,497 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash 114439138, now seen corresponding path program 1 times [2020-11-30 01:57:04,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:04,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831726442] [2020-11-30 01:57:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:57:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831726442] [2020-11-30 01:57:04,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:04,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:57:04,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366934420] [2020-11-30 01:57:04,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:57:04,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:04,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:57:04,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:04,549 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 3 states. [2020-11-30 01:57:04,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:04,577 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-11-30 01:57:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:57:04,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-30 01:57:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:04,579 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:57:04,579 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 01:57:04,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:04,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 01:57:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 01:57:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 01:57:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-11-30 01:57:04,584 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 12 [2020-11-30 01:57:04,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:04,584 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-11-30 01:57:04,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:57:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-11-30 01:57:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:57:04,585 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:04,585 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1] [2020-11-30 01:57:04,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-30 01:57:04,586 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash -889101326, now seen corresponding path program 2 times [2020-11-30 01:57:04,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:04,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790791155] [2020-11-30 01:57:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:04,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790791155] [2020-11-30 01:57:04,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947362630] [2020-11-30 01:57:04,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:57:04,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 01:57:04,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:57:04,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:57:04,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:57:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:04,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:57:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:05,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27356418] [2020-11-30 01:57:05,091 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:57:05,091 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:57:05,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:57:05,094 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:57:05,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:57:05,529 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:57:05,769 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 26 [2020-11-30 01:57:05,941 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-11-30 01:57:06,440 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-11-30 01:57:06,809 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-11-30 01:57:07,131 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-11-30 01:57:07,466 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:57:07,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:57:07,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2020-11-30 01:57:07,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264132663] [2020-11-30 01:57:07,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:57:07,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:07,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:57:07,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:57:07,470 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 18 states. [2020-11-30 01:57:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:08,118 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-11-30 01:57:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 01:57:08,118 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-30 01:57:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:08,120 INFO L225 Difference]: With dead ends: 49 [2020-11-30 01:57:08,120 INFO L226 Difference]: Without dead ends: 48 [2020-11-30 01:57:08,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=375, Invalid=1265, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 01:57:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-30 01:57:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-11-30 01:57:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-30 01:57:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-11-30 01:57:08,134 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 22 [2020-11-30 01:57:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:08,135 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-11-30 01:57:08,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:57:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-11-30 01:57:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-30 01:57:08,140 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:08,141 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1] [2020-11-30 01:57:08,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-30 01:57:08,356 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1013170070, now seen corresponding path program 3 times [2020-11-30 01:57:08,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:08,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23743659] [2020-11-30 01:57:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:08,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23743659] [2020-11-30 01:57:08,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20195426] [2020-11-30 01:57:08,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:57:08,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:57:08,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:57:08,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 01:57:08,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:57:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:09,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:57:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 138 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:13,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907547222] [2020-11-30 01:57:13,610 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:57:13,610 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:57:13,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:57:13,611 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:57:13,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:57:14,015 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:57:14,308 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 26 [2020-11-30 01:57:14,540 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-11-30 01:57:15,122 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-11-30 01:57:15,646 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-11-30 01:57:16,055 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-11-30 01:57:16,547 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:57:16,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:57:16,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2020-11-30 01:57:16,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917554050] [2020-11-30 01:57:16,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-30 01:57:16,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:16,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-30 01:57:16,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2056, Unknown=1, NotChecked=0, Total=2450 [2020-11-30 01:57:16,551 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 42 states. [2020-11-30 01:57:22,310 WARN L193 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-11-30 01:58:05,633 WARN L193 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-11-30 01:58:18,413 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-11-30 01:58:29,153 WARN L193 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-11-30 01:58:48,739 WARN L193 SmtUtils]: Spent 13.01 s on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2020-11-30 01:59:02,151 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-11-30 01:59:15,776 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-11-30 01:59:32,439 WARN L193 SmtUtils]: Spent 4.67 s on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-11-30 01:59:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:48,030 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2020-11-30 01:59:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-30 01:59:48,033 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-11-30 01:59:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:48,034 INFO L225 Difference]: With dead ends: 96 [2020-11-30 01:59:48,035 INFO L226 Difference]: Without dead ends: 95 [2020-11-30 01:59:48,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 135.3s TimeCoverageRelationStatistics Valid=2103, Invalid=6609, Unknown=30, NotChecked=0, Total=8742 [2020-11-30 01:59:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-30 01:59:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-11-30 01:59:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-30 01:59:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-11-30 01:59:48,059 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 46 [2020-11-30 01:59:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:48,060 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-11-30 01:59:48,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-30 01:59:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-11-30 01:59:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-30 01:59:48,064 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:48,064 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1] [2020-11-30 01:59:48,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-30 01:59:48,292 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:59:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash 90010334, now seen corresponding path program 4 times [2020-11-30 01:59:48,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:48,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142331331] [2020-11-30 01:59:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:49,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142331331] [2020-11-30 01:59:49,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350888271] [2020-11-30 01:59:49,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03d5ec2c-336d-408e-aa20-cdfb9ce04600/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:59:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-30 01:59:49,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:54,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:06:54,312 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-11-30 02:08:39,265 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-11-30 02:12:18,975 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-11-30 02:12:18,975 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-11-30 02:12:18,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172773479] [2020-11-30 02:12:18,978 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 02:12:18,979 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:18,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:18,979 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:18,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:18,996 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:229) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 42 more [2020-11-30 02:12:19,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:12:19,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-11-30 02:12:19,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952671] [2020-11-30 02:12:19,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-30 02:12:19,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:19,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-30 02:12:19,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1361, Invalid=6423, Unknown=226, NotChecked=0, Total=8010 [2020-11-30 02:12:19,014 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 33 states. [2020-11-30 02:12:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:12:19,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:19,234 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1a921e04 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:12:19,237 INFO L168 Benchmark]: Toolchain (without parser) took 920320.88 ms. Allocated memory was 104.9 MB in the beginning and 159.4 MB in the end (delta: 54.5 MB). Free memory was 67.3 MB in the beginning and 62.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 58.9 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:19,238 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 104.9 MB. Free memory was 83.3 MB in the beginning and 83.2 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:12:19,238 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.00 ms. Allocated memory is still 104.9 MB. Free memory was 67.2 MB in the beginning and 80.4 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:19,239 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.99 ms. Allocated memory is still 104.9 MB. Free memory was 80.4 MB in the beginning and 79.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:12:19,240 INFO L168 Benchmark]: Boogie Preprocessor took 53.82 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 77.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:19,240 INFO L168 Benchmark]: RCFGBuilder took 509.54 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 62.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:19,241 INFO L168 Benchmark]: TraceAbstraction took 919376.73 ms. Allocated memory was 104.9 MB in the beginning and 159.4 MB in the end (delta: 54.5 MB). Free memory was 62.0 MB in the beginning and 62.0 MB in the end (delta: 26.6 kB). Peak memory consumption was 55.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:19,253 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 104.9 MB. Free memory was 83.3 MB in the beginning and 83.2 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.00 ms. Allocated memory is still 104.9 MB. Free memory was 67.2 MB in the beginning and 80.4 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.99 ms. Allocated memory is still 104.9 MB. Free memory was 80.4 MB in the beginning and 79.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.82 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 77.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 509.54 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 62.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 919376.73 ms. Allocated memory was 104.9 MB in the beginning and 159.4 MB in the end (delta: 54.5 MB). Free memory was 62.0 MB in the beginning and 62.0 MB in the end (delta: 26.6 kB). Peak memory consumption was 55.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1a921e04 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1a921e04: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...