./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b312eb4f8caa7cb61d3a06c0594e4f86d10948be ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:43:44,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:43:44,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:43:44,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:43:44,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:43:44,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:43:44,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:43:44,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:43:44,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:43:44,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:43:44,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:43:44,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:43:44,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:43:44,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:43:44,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:43:44,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:43:44,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:43:44,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:43:44,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:43:44,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:43:44,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:43:44,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:43:44,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:43:44,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:43:44,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:43:44,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:43:44,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:43:44,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:43:44,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:43:44,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:43:44,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:43:44,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:43:44,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:43:44,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:43:44,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:43:44,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:43:44,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:43:44,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:43:44,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:43:44,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:43:44,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:43:44,590 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:43:44,637 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:43:44,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:43:44,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:43:44,643 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:43:44,643 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:43:44,643 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:43:44,644 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:43:44,644 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:43:44,644 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:43:44,644 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:43:44,646 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:43:44,646 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:43:44,646 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:43:44,646 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:43:44,647 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:43:44,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:43:44,648 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:43:44,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:43:44,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:43:44,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:43:44,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:43:44,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:43:44,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:43:44,650 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:43:44,650 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:43:44,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:43:44,650 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:43:44,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:43:44,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:43:44,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:43:44,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:43:44,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:43:44,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:43:44,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:43:44,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:43:44,654 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:43:44,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:43:44,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:43:44,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:43:44,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:43:44,656 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_c80ae10e-7552-4515-9eaa-2934862852e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b312eb4f8caa7cb61d3a06c0594e4f86d10948be [2020-11-28 07:43:44,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:43:44,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:43:44,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:43:44,998 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:43:45,000 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:43:45,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/../../sv-benchmarks/c/loops/string-1.i [2020-11-28 07:43:45,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/data/e526652f0/899c07d146424cbc99efd026f3e29c75/FLAG8a15bed75 [2020-11-28 07:43:45,684 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:43:45,684 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/sv-benchmarks/c/loops/string-1.i [2020-11-28 07:43:45,691 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/data/e526652f0/899c07d146424cbc99efd026f3e29c75/FLAG8a15bed75 [2020-11-28 07:43:46,031 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/data/e526652f0/899c07d146424cbc99efd026f3e29c75 [2020-11-28 07:43:46,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:43:46,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:43:46,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:43:46,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:43:46,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:43:46,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54efb07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46, skipping insertion in model container [2020-11-28 07:43:46,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:43:46,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:43:46,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:43:46,363 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:43:46,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:43:46,400 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:43:46,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46 WrapperNode [2020-11-28 07:43:46,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:43:46,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:43:46,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:43:46,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:43:46,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:43:46,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:43:46,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:43:46,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:43:46,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (1/1) ... [2020-11-28 07:43:46,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:43:46,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:43:46,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:43:46,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:43:46,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/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 [2020-11-28 07:43:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:43:46,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:43:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:43:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:43:46,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:43:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:43:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:43:47,348 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:43:47,348 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 07:43:47,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:47 BoogieIcfgContainer [2020-11-28 07:43:47,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:43:47,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:43:47,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:43:47,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:43:47,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:43:46" (1/3) ... [2020-11-28 07:43:47,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a5e6b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:47, skipping insertion in model container [2020-11-28 07:43:47,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:46" (2/3) ... [2020-11-28 07:43:47,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a5e6b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:47, skipping insertion in model container [2020-11-28 07:43:47,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:47" (3/3) ... [2020-11-28 07:43:47,361 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-11-28 07:43:47,373 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:43:47,378 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:43:47,391 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:43:47,416 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:43:47,416 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:43:47,417 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:43:47,417 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:43:47,417 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:43:47,417 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:43:47,417 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:43:47,418 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:43:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-28 07:43:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:43:47,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:47,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:47,438 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1305036603, now seen corresponding path program 1 times [2020-11-28 07:43:47,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:47,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722109999] [2020-11-28 07:43:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:47,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722109999] [2020-11-28 07:43:47,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:47,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:47,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901799341] [2020-11-28 07:43:47,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:47,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:47,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:47,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:47,727 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-11-28 07:43:47,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:47,805 INFO L93 Difference]: Finished difference Result 47 states and 72 transitions. [2020-11-28 07:43:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:47,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-28 07:43:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:47,816 INFO L225 Difference]: With dead ends: 47 [2020-11-28 07:43:47,817 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 07:43:47,820 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 [2020-11-28 07:43:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 07:43:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-11-28 07:43:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:43:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-11-28 07:43:47,855 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2020-11-28 07:43:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:47,856 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-11-28 07:43:47,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-11-28 07:43:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 07:43:47,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:47,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:47,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:43:47,857 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash 199195001, now seen corresponding path program 1 times [2020-11-28 07:43:47,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:47,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34507101] [2020-11-28 07:43:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:43:47,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34507101] [2020-11-28 07:43:47,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611153636] [2020-11-28 07:43:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/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 [2020-11-28 07:43:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:48,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:43:48,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:43:48,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:43:48,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1142231729] [2020-11-28 07:43:48,179 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-28 07:43:48,179 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:43:48,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:43:48,195 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:43:48,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:43:49,404 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:43:49,533 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-11-28 07:43:49,691 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-28 07:43:49,833 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-28 07:43:49,987 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-11-28 07:43:50,174 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-11-28 07:43:50,392 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-28 07:43:50,610 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-11-28 07:43:50,864 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-11-28 07:43:51,069 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-28 07:43:51,253 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-11-28 07:43:51,497 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-11-28 07:43:51,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:43:51,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 17 [2020-11-28 07:43:51,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562137557] [2020-11-28 07:43:51,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 07:43:51,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:51,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 07:43:51,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-28 07:43:51,503 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 13 states. [2020-11-28 07:43:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:51,748 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-11-28 07:43:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 07:43:51,749 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-11-28 07:43:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:51,750 INFO L225 Difference]: With dead ends: 35 [2020-11-28 07:43:51,750 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 07:43:51,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-28 07:43:51,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 07:43:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-11-28 07:43:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 07:43:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-11-28 07:43:51,758 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 17 [2020-11-28 07:43:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:51,758 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-11-28 07:43:51,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 07:43:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-11-28 07:43:51,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:43:51,763 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:51,763 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:51,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 07:43:51,990 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1283454260, now seen corresponding path program 1 times [2020-11-28 07:43:51,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:51,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292760856] [2020-11-28 07:43:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:43:52,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292760856] [2020-11-28 07:43:52,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818923405] [2020-11-28 07:43:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/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 [2020-11-28 07:43:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:52,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:43:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:43:52,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:43:52,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1310227082] [2020-11-28 07:43:52,158 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-28 07:43:52,161 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:43:52,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:43:52,162 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:43:52,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:43:53,267 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:43:53,415 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-11-28 07:43:53,555 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-28 07:43:53,725 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-28 07:43:53,887 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-11-28 07:43:54,073 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-11-28 07:43:54,278 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-28 07:43:54,743 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-11-28 07:43:54,923 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-11-28 07:43:55,116 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-11-28 07:43:55,350 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-11-28 07:43:55,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:43:55,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 3, 3] total 16 [2020-11-28 07:43:55,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866535879] [2020-11-28 07:43:55,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 07:43:55,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 07:43:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:43:55,353 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 12 states. [2020-11-28 07:43:55,677 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-11-28 07:43:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:55,756 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-11-28 07:43:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 07:43:55,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-11-28 07:43:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:55,757 INFO L225 Difference]: With dead ends: 34 [2020-11-28 07:43:55,758 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 07:43:55,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-11-28 07:43:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 07:43:55,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-11-28 07:43:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:43:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-11-28 07:43:55,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 19 [2020-11-28 07:43:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:55,763 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-11-28 07:43:55,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 07:43:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-11-28 07:43:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:43:55,764 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:55,764 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:55,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:55,978 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:55,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:55,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1912068830, now seen corresponding path program 1 times [2020-11-28 07:43:55,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:55,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389093974] [2020-11-28 07:43:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:43:56,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389093974] [2020-11-28 07:43:56,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673784329] [2020-11-28 07:43:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/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 [2020-11-28 07:43:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:56,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:43:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:43:56,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:43:56,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040511634] [2020-11-28 07:43:56,150 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-28 07:43:56,150 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:43:56,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:43:56,151 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:43:56,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:43:57,064 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:43:57,185 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-11-28 07:43:57,337 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-28 07:43:57,832 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-11-28 07:43:57,970 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-11-28 07:43:58,134 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-11-28 07:43:58,301 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-11-28 07:43:58,536 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-11-28 07:43:58,688 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-11-28 07:43:58,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:43:58,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 3, 3] total 16 [2020-11-28 07:43:58,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826618331] [2020-11-28 07:43:58,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 07:43:58,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:58,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 07:43:58,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:43:58,694 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 12 states. [2020-11-28 07:43:59,017 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-11-28 07:43:59,218 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-11-28 07:43:59,430 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-11-28 07:43:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:59,487 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-11-28 07:43:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 07:43:59,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-11-28 07:43:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:59,488 INFO L225 Difference]: With dead ends: 31 [2020-11-28 07:43:59,488 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 07:43:59,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-11-28 07:43:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 07:43:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-11-28 07:43:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:43:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-28 07:43:59,494 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 19 [2020-11-28 07:43:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:59,494 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-28 07:43:59,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 07:43:59,494 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-28 07:43:59,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 07:43:59,495 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:59,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:59,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:59,722 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:59,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:59,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1912237735, now seen corresponding path program 1 times [2020-11-28 07:43:59,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:59,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667134773] [2020-11-28 07:43:59,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 07:43:59,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667134773] [2020-11-28 07:43:59,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967215674] [2020-11-28 07:43:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/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 [2020-11-28 07:43:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:59,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:43:59,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 07:43:59,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 07:43:59,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592402191] [2020-11-28 07:43:59,884 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-28 07:43:59,884 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:43:59,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:43:59,885 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:43:59,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:44:00,720 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:44:00,949 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-28 07:44:01,345 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-11-28 07:44:01,730 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-11-28 07:44:02,060 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-11-28 07:44:02,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:44:02,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 14 [2020-11-28 07:44:02,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993209028] [2020-11-28 07:44:02,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:44:02,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:44:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:44:02,062 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 10 states. [2020-11-28 07:44:02,347 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-11-28 07:44:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:02,401 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-11-28 07:44:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:44:02,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-11-28 07:44:02,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:02,404 INFO L225 Difference]: With dead ends: 28 [2020-11-28 07:44:02,404 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 07:44:02,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:44:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 07:44:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-11-28 07:44:02,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 07:44:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-28 07:44:02,410 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 21 [2020-11-28 07:44:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:02,410 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-28 07:44:02,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:44:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-28 07:44:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 07:44:02,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:02,411 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:44:02,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:44:02,612 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:02,613 INFO L82 PathProgramCache]: Analyzing trace with hash 852095391, now seen corresponding path program 1 times [2020-11-28 07:44:02,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:02,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429243625] [2020-11-28 07:44:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 07:44:02,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429243625] [2020-11-28 07:44:02,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077284637] [2020-11-28 07:44:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:44:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:02,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:44:02,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:44:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 07:44:02,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:44:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 07:44:02,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226312569] [2020-11-28 07:44:02,820 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-28 07:44:02,820 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:44:02,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:44:02,821 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:44:02,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:44:03,783 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:44:03,918 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-11-28 07:44:04,166 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-28 07:44:04,505 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-11-28 07:44:04,626 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-11-28 07:44:04,995 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-11-28 07:44:05,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:44:05,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 14 [2020-11-28 07:44:05,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934494250] [2020-11-28 07:44:05,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:44:05,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:05,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:44:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:44:05,067 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 9 states. [2020-11-28 07:44:05,339 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-11-28 07:44:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:05,362 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-11-28 07:44:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:44:05,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-11-28 07:44:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:05,364 INFO L225 Difference]: With dead ends: 23 [2020-11-28 07:44:05,364 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:44:05,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:44:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:44:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:44:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:44:05,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:44:05,365 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-11-28 07:44:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:05,365 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:44:05,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:44:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:44:05,365 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:44:05,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:44:05,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:44:05,928 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-11-28 07:44:06,111 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-11-28 07:44:06,193 INFO L274 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-11-28 07:44:06,194 INFO L277 CegarLoopResult]: At program point L19-2(lines 18 23) the Hoare annotation is: true [2020-11-28 07:44:06,194 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:44:06,194 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-28 07:44:06,194 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-28 07:44:06,194 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-28 07:44:06,194 INFO L270 CegarLoopResult]: At program point L37-3(lines 37 38) the Hoare annotation is: (and (= |#t~string1.offset| 0) (<= 0 |#t~string0.base|) (<= 0 ULTIMATE.start_main_~i~0) (<= |ULTIMATE.start_main_~#string_B~0.offset| 0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |#t~string1.base|) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (= ULTIMATE.start_main_~found~0 0) (<= |ULTIMATE.start_main_~#string_A~0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.offset|) (= |#NULL.offset| 0) (= |#t~string0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_A~0.offset|) (<= 0 |#StackHeapBarrier|)) [2020-11-28 07:44:06,194 INFO L274 CegarLoopResult]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2020-11-28 07:44:06,195 INFO L270 CegarLoopResult]: At program point L46-3(lines 46 47) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~nc_A~0) (<= 0 ULTIMATE.start_main_~nc_B~0) (<= |ULTIMATE.start_main_~#string_A~0.offset| 0) (<= 5 ULTIMATE.start_main_~i~0) (<= 0 |ULTIMATE.start_main_~#string_B~0.offset|) (= |#NULL.offset| 0) (let ((.cse0 (= |#t~string1.offset| 0)) (.cse1 (<= 0 |#t~string0.base|)) (.cse2 (<= |ULTIMATE.start_main_~#string_B~0.offset| 0)) (.cse3 (= ULTIMATE.start_main_~found~0 0)) (.cse4 (= |#NULL.base| 0)) (.cse5 (<= 0 |ULTIMATE.start_main_~#string_B~0.base|)) (.cse6 (<= 0 |#t~string1.base|)) (.cse7 (<= 0 |ULTIMATE.start_main_~#string_A~0.base|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (<= 1 ULTIMATE.start_main_~nc_A~0) .cse5 .cse6 .cse7) (and .cse0 .cse1 .cse2 .cse3 (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_B~0.base|) (+ |ULTIMATE.start_main_~#string_B~0.offset| 4)) 0) .cse4 .cse5 .cse6 .cse7))) (= |#t~string0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_A~0.offset|) (<= 0 |#StackHeapBarrier|)) [2020-11-28 07:44:06,195 INFO L274 CegarLoopResult]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2020-11-28 07:44:06,195 INFO L277 CegarLoopResult]: At program point L71(lines 28 72) the Hoare annotation is: true [2020-11-28 07:44:06,195 INFO L277 CegarLoopResult]: At program point L55-2(lines 53 65) the Hoare annotation is: true [2020-11-28 07:44:06,195 INFO L274 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-11-28 07:44:06,195 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:44:06,195 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:44:06,195 INFO L270 CegarLoopResult]: At program point L33-3(lines 33 34) the Hoare annotation is: (and (= |#t~string1.offset| 0) (<= 0 |#t~string0.base|) (<= 0 ULTIMATE.start_main_~i~0) (<= |ULTIMATE.start_main_~#string_B~0.offset| 0) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |#t~string1.base|) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (= ULTIMATE.start_main_~found~0 0) (<= |ULTIMATE.start_main_~#string_A~0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.offset|) (= |#NULL.offset| 0) (= |#t~string0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_A~0.offset|) (<= 0 |#StackHeapBarrier|)) [2020-11-28 07:44:06,196 INFO L274 CegarLoopResult]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2020-11-28 07:44:06,196 INFO L270 CegarLoopResult]: At program point L42-3(lines 42 43) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~nc_A~0) (let ((.cse0 (= |#t~string1.offset| 0)) (.cse1 (<= 0 |#t~string0.base|)) (.cse2 (<= |ULTIMATE.start_main_~#string_B~0.offset| 0)) (.cse3 (= ULTIMATE.start_main_~found~0 0)) (.cse4 (= |#NULL.base| 0)) (.cse5 (<= |ULTIMATE.start_main_~#string_A~0.offset| 0)) (.cse6 (<= 0 |ULTIMATE.start_main_~#string_B~0.offset|)) (.cse7 (= |#NULL.offset| 0)) (.cse8 (<= 0 |ULTIMATE.start_main_~#string_B~0.base|)) (.cse9 (<= 0 |#t~string1.base|)) (.cse10 (<= 0 |ULTIMATE.start_main_~#string_A~0.base|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (<= 1 ULTIMATE.start_main_~nc_A~0) .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 .cse2 .cse3 (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_B~0.base|) (+ |ULTIMATE.start_main_~#string_B~0.offset| 4)) 0) .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10))) (<= 5 ULTIMATE.start_main_~i~0) (= |#t~string0.offset| 0) (<= 0 |ULTIMATE.start_main_~#string_A~0.offset|) (<= 0 |#StackHeapBarrier|)) [2020-11-28 07:44:06,196 INFO L274 CegarLoopResult]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2020-11-28 07:44:06,196 INFO L274 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-11-28 07:44:06,206 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,206 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,207 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-28 07:44:06,207 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,207 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,215 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,215 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,215 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-28 07:44:06,215 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,216 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,221 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,222 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,222 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-28 07:44:06,222 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,222 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,222 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,229 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,230 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,230 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-28 07:44:06,230 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,230 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,230 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,231 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,231 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,231 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,231 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,232 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,232 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,232 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,232 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,232 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,233 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,233 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,233 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:44:06 BoogieIcfgContainer [2020-11-28 07:44:06,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:44:06,235 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:44:06,235 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:44:06,235 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:44:06,236 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:47" (3/4) ... [2020-11-28 07:44:06,238 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:44:06,258 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2020-11-28 07:44:06,258 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-28 07:44:06,259 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:44:06,259 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:44:06,319 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c80ae10e-7552-4515-9eaa-2934862852e1/bin/utaipan/witness.graphml [2020-11-28 07:44:06,319 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:44:06,320 INFO L168 Benchmark]: Toolchain (without parser) took 20280.87 ms. Allocated memory was 104.9 MB in the beginning and 195.0 MB in the end (delta: 90.2 MB). Free memory was 72.7 MB in the beginning and 79.6 MB in the end (delta: -6.8 MB). Peak memory consumption was 82.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:06,321 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 79.7 MB. Free memory was 61.1 MB in the beginning and 61.1 MB in the end (delta: 24.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:44:06,321 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.59 ms. Allocated memory is still 104.9 MB. Free memory was 72.7 MB in the beginning and 82.3 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:06,322 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.34 ms. Allocated memory is still 104.9 MB. Free memory was 82.3 MB in the beginning and 80.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:06,322 INFO L168 Benchmark]: Boogie Preprocessor took 50.79 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:06,323 INFO L168 Benchmark]: RCFGBuilder took 825.80 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 55.1 MB in the end (delta: 24.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:06,323 INFO L168 Benchmark]: TraceAbstraction took 18882.15 ms. Allocated memory was 104.9 MB in the beginning and 195.0 MB in the end (delta: 90.2 MB). Free memory was 54.8 MB in the beginning and 82.7 MB in the end (delta: -27.9 MB). Peak memory consumption was 90.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:06,324 INFO L168 Benchmark]: Witness Printer took 84.11 ms. Allocated memory is still 195.0 MB. Free memory was 82.7 MB in the beginning and 79.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:06,326 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 79.7 MB. Free memory was 61.1 MB in the beginning and 61.1 MB in the end (delta: 24.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 357.59 ms. Allocated memory is still 104.9 MB. Free memory was 72.7 MB in the beginning and 82.3 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.34 ms. Allocated memory is still 104.9 MB. Free memory was 82.3 MB in the beginning and 80.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.79 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 825.80 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 55.1 MB in the end (delta: 24.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18882.15 ms. Allocated memory was 104.9 MB in the beginning and 195.0 MB in the end (delta: 90.2 MB). Free memory was 54.8 MB in the beginning and 82.7 MB in the end (delta: -27.9 MB). Peak memory consumption was 90.3 MB. Max. memory is 16.1 GB. * Witness Printer took 84.11 ms. Allocated memory is still 195.0 MB. Free memory was 82.7 MB in the beginning and 79.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant [2020-11-28 07:44:06,351 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,352 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,352 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-28 07:44:06,353 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,353 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,357 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,359 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,359 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-28 07:44:06,359 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,359 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier Derived loop invariant: ((((((((0 <= nc_A && 0 <= nc_B) && string_A <= 0) && 5 <= i) && 0 <= string_B) && #NULL == 0) && ((((((((("string-1.c" == 0 && 0 <= "0") && string_B <= 0) && found == 0) && #NULL == 0) && 1 <= nc_A) && 0 <= string_B) && 0 <= "string-1.c") && 0 <= string_A) || (((((((("string-1.c" == 0 && 0 <= "0") && string_B <= 0) && found == 0) && unknown-#memory_int-unknown[string_B][string_B + 4] == 0) && #NULL == 0) && 0 <= string_B) && 0 <= "string-1.c") && 0 <= string_A))) && "0" == 0) && 0 <= string_A) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant [2020-11-28 07:44:06,361 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,364 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,364 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-28 07:44:06,364 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,364 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,365 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,365 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,367 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,367 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-28 07:44:06,367 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,368 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,368 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier Derived loop invariant: ((((0 <= nc_A && (((((((((((("string-1.c" == 0 && 0 <= "0") && string_B <= 0) && found == 0) && #NULL == 0) && 1 <= nc_A) && string_A <= 0) && 0 <= string_B) && #NULL == 0) && 0 <= string_B) && 0 <= "string-1.c") && 0 <= string_A) || ((((((((((("string-1.c" == 0 && 0 <= "0") && string_B <= 0) && found == 0) && unknown-#memory_int-unknown[string_B][string_B + 4] == 0) && #NULL == 0) && string_A <= 0) && 0 <= string_B) && #NULL == 0) && 0 <= string_B) && 0 <= "string-1.c") && 0 <= string_A))) && 5 <= i) && "0" == 0) && 0 <= string_A) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 37]: Loop Invariant [2020-11-28 07:44:06,372 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,372 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,372 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,373 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,373 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,373 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier Derived loop invariant: ((((((((((((("string-1.c" == 0 && 0 <= "0") && 0 <= i) && string_B <= 0) && #NULL == 0) && 0 <= string_B) && 0 <= "string-1.c") && 0 <= string_A) && found == 0) && string_A <= 0) && 0 <= string_B) && #NULL == 0) && "0" == 0) && 0 <= string_A) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 33]: Loop Invariant [2020-11-28 07:44:06,374 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,374 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,374 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-28 07:44:06,375 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,376 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-28 07:44:06,376 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier Derived loop invariant: ((((((((((((("string-1.c" == 0 && 0 <= "0") && 0 <= i) && string_B <= 0) && #NULL == 0) && 0 <= string_B) && 0 <= "string-1.c") && 0 <= string_A) && found == 0) && string_A <= 0) && 0 <= string_B) && #NULL == 0) && "0" == 0) && 0 <= string_A) && 0 <= unknown-#StackHeapBarrier-unknown - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.1s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 86 SDslu, 108 SDs, 0 SdLazy, 470 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 307 GetRequests, 223 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 10.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 25 NumberOfFragments, 283 HoareAnnotationTreeSize, 7 FomulaSimplifications, 707 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 599 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 209 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 291 ConstructedInterpolants, 0 QuantifiedInterpolants, 6519 SizeOfPredicates, 5 NumberOfNonLiveVariables, 498 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 54/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 5050, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 70, DAG_INTERPRETER_EARLY_EXITS: 5, TOOLS_POST_APPLICATIONS: 142, TOOLS_POST_TIME[ms]: 2638, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 142, TOOLS_QUANTIFIERELIM_TIME[ms]: 2594, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 293, FLUID_QUERY_TIME[ms]: 12, FLUID_QUERIES: 335, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 251, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 36, DOMAIN_WIDEN_TIME[ms]: 1611, DOMAIN_ISSUBSETEQ_APPLICATIONS: 53, DOMAIN_ISSUBSETEQ_TIME[ms]: 261, DOMAIN_ISBOTTOM_APPLICATIONS: 70, DOMAIN_ISBOTTOM_TIME[ms]: 158, LOOP_SUMMARIZER_APPLICATIONS: 17, LOOP_SUMMARIZER_CACHE_MISSES: 17, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 3688, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 3688, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 53, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 4, PATH_EXPR_TIME[ms]: 6, REGEX_TO_DAG_TIME[ms]: 5, DAG_COMPRESSION_TIME[ms]: 36, DAG_COMPRESSION_PROCESSED_NODES: 1047, DAG_COMPRESSION_RETAINED_NODES: 238, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...