./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-with-pointer/simple-recursive.c --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_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-with-pointer/simple-recursive.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/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 400754ae011c17d3326e3fdd997cfc3a510c1705 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:03:05,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:03:05,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:03:05,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:03:05,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:03:05,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:03:05,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:03:05,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:03:05,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:03:05,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:03:05,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:03:05,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:03:05,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:03:05,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:03:05,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:03:05,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:03:05,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:03:05,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:03:05,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:03:05,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:03:05,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:03:05,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:03:05,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:03:05,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:03:05,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:03:05,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:03:05,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:03:05,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:03:05,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:03:05,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:03:05,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:03:05,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:03:05,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:03:05,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:03:05,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:03:05,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:03:05,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:03:05,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:03:05,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:03:05,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:03:05,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:03:05,441 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:03:05,481 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:03:05,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:03:05,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:03:05,483 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:03:05,484 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:03:05,484 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:03:05,484 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:03:05,484 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:03:05,484 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:03:05,485 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:03:05,486 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:03:05,486 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:03:05,486 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:03:05,486 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:03:05,487 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:03:05,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:03:05,488 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:03:05,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:03:05,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:03:05,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:03:05,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:03:05,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:03:05,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:03:05,489 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:03:05,489 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:03:05,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:03:05,490 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:03:05,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:03:05,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:03:05,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:03:05,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:03:05,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:03:05,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:03:05,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:03:05,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:03:05,493 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:03:05,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:03:05,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:03:05,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:03:05,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:03:05,494 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_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 400754ae011c17d3326e3fdd997cfc3a510c1705 [2020-11-22 13:03:05,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:03:05,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:03:05,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:03:05,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:03:05,829 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:03:05,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/../../sv-benchmarks/c/recursive-with-pointer/simple-recursive.c [2020-11-22 13:03:05,904 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/data/aae51b75d/1d1d3eb5998a4d2f982e9c73d81311b9/FLAG77c9aeb70 [2020-11-22 13:03:06,307 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:03:06,308 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/sv-benchmarks/c/recursive-with-pointer/simple-recursive.c [2020-11-22 13:03:06,318 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/data/aae51b75d/1d1d3eb5998a4d2f982e9c73d81311b9/FLAG77c9aeb70 [2020-11-22 13:03:06,689 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/data/aae51b75d/1d1d3eb5998a4d2f982e9c73d81311b9 [2020-11-22 13:03:06,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:03:06,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:03:06,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:06,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:03:06,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:03:06,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:06,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320e6d80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06, skipping insertion in model container [2020-11-22 13:03:06,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:06,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:03:06,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:03:06,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:06,895 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:03:06,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:06,928 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:03:06,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06 WrapperNode [2020-11-22 13:03:06,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:06,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:06,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:03:06,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:03:06,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:06,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:06,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:06,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:03:06,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:03:06,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:03:06,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:06,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:06,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:06,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:06,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:07,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:07,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (1/1) ... [2020-11-22 13:03:07,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:03:07,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:03:07,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:03:07,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:03:07,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/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 [2020-11-22 13:03:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-11-22 13:03:07,096 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-11-22 13:03:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:03:07,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:03:07,097 INFO L130 BoogieDeclarations]: Found specification of procedure plus [2020-11-22 13:03:07,097 INFO L138 BoogieDeclarations]: Found implementation of procedure plus [2020-11-22 13:03:07,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:03:07,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:03:07,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:03:07,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 13:03:07,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:03:07,488 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:03:07,488 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-22 13:03:07,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:07 BoogieIcfgContainer [2020-11-22 13:03:07,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:03:07,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:03:07,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:03:07,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:03:07,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:03:06" (1/3) ... [2020-11-22 13:03:07,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed109a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:03:07, skipping insertion in model container [2020-11-22 13:03:07,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:06" (2/3) ... [2020-11-22 13:03:07,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed109a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:03:07, skipping insertion in model container [2020-11-22 13:03:07,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:07" (3/3) ... [2020-11-22 13:03:07,499 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-recursive.c [2020-11-22 13:03:07,509 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:03:07,513 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:03:07,525 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:03:07,548 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:03:07,548 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:03:07,548 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:03:07,548 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:03:07,548 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:03:07,549 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:03:07,549 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:03:07,549 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:03:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-22 13:03:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:03:07,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:07,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:03:07,577 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:07,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1918159205, now seen corresponding path program 1 times [2020-11-22 13:03:07,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:07,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178733777] [2020-11-22 13:03:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:07,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178733777] [2020-11-22 13:03:07,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:07,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:07,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149215873] [2020-11-22 13:03:07,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:03:07,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:07,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:03:07,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:03:07,823 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-11-22 13:03:07,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:07,933 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-11-22 13:03:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:03:07,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-22 13:03:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:07,943 INFO L225 Difference]: With dead ends: 28 [2020-11-22 13:03:07,944 INFO L226 Difference]: Without dead ends: 13 [2020-11-22 13:03:07,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:03:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-22 13:03:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-22 13:03:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 13:03:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-22 13:03:07,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2020-11-22 13:03:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:07,984 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-22 13:03:07,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:03:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-22 13:03:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:03:07,985 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:07,986 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:07,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:03:07,986 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1539450124, now seen corresponding path program 1 times [2020-11-22 13:03:07,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:07,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943867298] [2020-11-22 13:03:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:08,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943867298] [2020-11-22 13:03:08,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451512641] [2020-11-22 13:03:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/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 [2020-11-22 13:03:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-22 13:03:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:08,283 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-22 13:03:08,284 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:08,297 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 13:03:08,297 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-22 13:03:08,298 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-11-22 13:03:08,329 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-11-22 13:03:08,330 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:08,347 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 13:03:08,348 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-22 13:03:08,348 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:9 [2020-11-22 13:03:08,457 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-11-22 13:03:08,458 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:03:08,462 INFO L625 ElimStorePlain]: treesize reduction 6, result has 14.3 percent of original size [2020-11-22 13:03:08,463 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-22 13:03:08,463 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2020-11-22 13:03:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:08,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:08,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018226018] [2020-11-22 13:03:08,779 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-22 13:03:08,781 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:03:08,788 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-22 13:03:08,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:03:08,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 19 [2020-11-22 13:03:08,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990207467] [2020-11-22 13:03:08,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-22 13:03:08,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-22 13:03:08,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-11-22 13:03:08,802 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 20 states. [2020-11-22 13:03:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:09,279 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-22 13:03:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-22 13:03:09,279 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 11 [2020-11-22 13:03:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:09,280 INFO L225 Difference]: With dead ends: 27 [2020-11-22 13:03:09,280 INFO L226 Difference]: Without dead ends: 23 [2020-11-22 13:03:09,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2020-11-22 13:03:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-22 13:03:09,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-11-22 13:03:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-22 13:03:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-11-22 13:03:09,288 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 11 [2020-11-22 13:03:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:09,288 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-11-22 13:03:09,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-22 13:03:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-11-22 13:03:09,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 13:03:09,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:09,290 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-11-22 13:03:09,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 13:03:09,509 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:09,510 INFO L82 PathProgramCache]: Analyzing trace with hash -430493524, now seen corresponding path program 2 times [2020-11-22 13:03:09,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:09,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959326571] [2020-11-22 13:03:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:09,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959326571] [2020-11-22 13:03:09,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629598193] [2020-11-22 13:03:09,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/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 [2020-11-22 13:03:09,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-22 13:03:09,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:03:09,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-22 13:03:09,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:03:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-22 13:03:10,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:03:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-22 13:03:10,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2051021927] [2020-11-22 13:03:10,437 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-22 13:03:10,437 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:03:10,438 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-22 13:03:10,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:03:10,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 26 [2020-11-22 13:03:10,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526868846] [2020-11-22 13:03:10,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-22 13:03:10,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:10,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-22 13:03:10,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-11-22 13:03:10,440 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 26 states. [2020-11-22 13:03:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:11,056 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-11-22 13:03:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-22 13:03:11,056 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 21 [2020-11-22 13:03:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:11,056 INFO L225 Difference]: With dead ends: 29 [2020-11-22 13:03:11,056 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:03:11,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2020-11-22 13:03:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:03:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:03:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:03:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:03:11,058 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-11-22 13:03:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:11,059 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:03:11,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-22 13:03:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:03:11,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:03:11,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:03:11,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:03:11,589 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-11-22 13:03:11,662 INFO L274 CegarLoopResult]: For program point fooEXIT(lines 11 20) no Hoare annotation was computed. [2020-11-22 13:03:11,662 INFO L270 CegarLoopResult]: At program point fooENTRY(lines 11 20) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int)| |foo_#in~p.base|) |foo_#in~p.offset|)) (.cse1 (select (select |#memory_int| |foo_#in~p.base|) |foo_#in~p.offset|))) (and (or (not (<= .cse0 13)) (<= .cse1 13)) (or (not (= .cse0 11)) (= 11 .cse1)) (or (not (= .cse0 10)) (= 10 .cse1)) (or (<= .cse1 12) (not (<= .cse0 12))) (or (not (< .cse0 21)) (< .cse1 21)))) [2020-11-22 13:03:11,662 INFO L274 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-11-22 13:03:11,663 INFO L274 CegarLoopResult]: For program point fooErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-22 13:03:11,663 INFO L274 CegarLoopResult]: For program point L14(lines 14 19) no Hoare annotation was computed. [2020-11-22 13:03:11,663 INFO L270 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int)| |foo_#in~p.base|) |foo_#in~p.offset|)) (.cse1 (select (select |#memory_int| |foo_#in~p.base|) |foo_#in~p.offset|)) (.cse2 (select (select |#memory_int| foo_~p.base) foo_~p.offset))) (and (or (not (<= .cse0 13)) (<= .cse1 13)) (or (not (< .cse0 21)) (and (< .cse2 20) (< .cse1 21))) (or (not (<= .cse0 12)) (and (<= .cse2 12) (<= .cse1 12))) (or (not (= .cse0 10)) (and (= .cse2 10) (= 10 .cse1))) (or (not (= .cse0 11)) (and (= 11 .cse1) (<= .cse2 11))))) [2020-11-22 13:03:11,663 INFO L274 CegarLoopResult]: For program point L12(lines 12 19) no Hoare annotation was computed. [2020-11-22 13:03:11,663 INFO L274 CegarLoopResult]: For program point L12-1(lines 11 20) no Hoare annotation was computed. [2020-11-22 13:03:11,663 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:03:11,664 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:03:11,664 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (= (select (select |#memory_int| ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset) 10) [2020-11-22 13:03:11,664 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-11-22 13:03:11,664 INFO L274 CegarLoopResult]: For program point plusFINAL(lines 6 9) no Hoare annotation was computed. [2020-11-22 13:03:11,664 INFO L270 CegarLoopResult]: At program point plusENTRY(lines 6 9) the Hoare annotation is: (let ((.cse1 (select (select |old(#memory_int)| |plus_#in~p.base|) |plus_#in~p.offset|)) (.cse0 (select (select |#memory_int| |plus_#in~p.base|) |plus_#in~p.offset|))) (and (or (< .cse0 20) (not (< .cse1 20))) (or (= .cse0 10) (not (= .cse1 10))) (or (<= .cse0 11) (not (<= .cse1 11))) (or (not (<= .cse1 12)) (<= .cse0 12)))) [2020-11-22 13:03:11,664 INFO L274 CegarLoopResult]: For program point plusEXIT(lines 6 9) no Hoare annotation was computed. [2020-11-22 13:03:11,664 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| plus_~p.base) plus_~p.offset)) (.cse1 (select (select |#memory_int| |plus_#in~p.base|) |plus_#in~p.offset|)) (.cse2 (select (select |old(#memory_int)| |plus_#in~p.base|) |plus_#in~p.offset|))) (and (or (and (<= .cse0 12) (<= .cse1 12)) (not (<= .cse2 11))) (or (< .cse0 21) (not (< .cse2 20))) (or (not (<= .cse2 12)) (and (<= .cse0 13) (< .cse1 20))) (or (and (= .cse0 11) (<= .cse1 11)) (not (= .cse2 10))))) [2020-11-22 13:03:11,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:03:11 BoogieIcfgContainer [2020-11-22 13:03:11,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:03:11,669 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:03:11,669 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:03:11,670 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:03:11,670 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:07" (3/4) ... [2020-11-22 13:03:11,673 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:03:11,678 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-11-22 13:03:11,679 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure plus [2020-11-22 13:03:11,683 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-22 13:03:11,683 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 13:03:11,683 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 13:03:11,683 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:03:11,719 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6b6b80f7-cfe6-4ca7-bff5-e1e2764889a3/bin/utaipan/witness.graphml [2020-11-22 13:03:11,720 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:03:11,721 INFO L168 Benchmark]: Toolchain (without parser) took 5028.09 ms. Allocated memory was 92.3 MB in the beginning and 138.4 MB in the end (delta: 46.1 MB). Free memory was 55.9 MB in the beginning and 76.4 MB in the end (delta: -20.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:11,721 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 92.3 MB. Free memory is still 72.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:11,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.45 ms. Allocated memory is still 92.3 MB. Free memory was 55.7 MB in the beginning and 70.2 MB in the end (delta: -14.5 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:11,722 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.49 ms. Allocated memory is still 92.3 MB. Free memory was 70.0 MB in the beginning and 68.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:11,723 INFO L168 Benchmark]: Boogie Preprocessor took 44.03 ms. Allocated memory is still 92.3 MB. Free memory was 68.7 MB in the beginning and 67.8 MB in the end (delta: 929.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:11,723 INFO L168 Benchmark]: RCFGBuilder took 475.73 ms. Allocated memory is still 92.3 MB. Free memory was 67.6 MB in the beginning and 52.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:11,724 INFO L168 Benchmark]: TraceAbstraction took 4177.38 ms. Allocated memory was 92.3 MB in the beginning and 138.4 MB in the end (delta: 46.1 MB). Free memory was 51.7 MB in the beginning and 79.5 MB in the end (delta: -27.8 MB). Peak memory consumption was 49.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:11,725 INFO L168 Benchmark]: Witness Printer took 50.43 ms. Allocated memory is still 138.4 MB. Free memory was 79.5 MB in the beginning and 76.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:11,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 92.3 MB. Free memory is still 72.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 235.45 ms. Allocated memory is still 92.3 MB. Free memory was 55.7 MB in the beginning and 70.2 MB in the end (delta: -14.5 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.49 ms. Allocated memory is still 92.3 MB. Free memory was 70.0 MB in the beginning and 68.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.03 ms. Allocated memory is still 92.3 MB. Free memory was 68.7 MB in the beginning and 67.8 MB in the end (delta: 929.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 475.73 ms. Allocated memory is still 92.3 MB. Free memory was 67.6 MB in the beginning and 52.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4177.38 ms. Allocated memory was 92.3 MB in the beginning and 138.4 MB in the end (delta: 46.1 MB). Free memory was 51.7 MB in the beginning and 79.5 MB in the end (delta: -27.8 MB). Peak memory consumption was 49.0 MB. Max. memory is 16.1 GB. * Witness Printer took 50.43 ms. Allocated memory is still 138.4 MB. Free memory was 79.5 MB in the beginning and 76.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.7s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 14 SDslu, 68 SDs, 0 SdLazy, 283 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 21 PreInvPairs, 21 NumberOfFragments, 355 HoareAnnotationTreeSize, 21 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 191 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 70 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 7935 SizeOfPredicates, 24 NumberOfNonLiveVariables, 218 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 40/69 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...