./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b3_o2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/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 22bfff7e0bc9ff374f4201c2281f2aec36cb181e ........................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:31:13,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:31:13,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:31:13,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:31:13,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:31:13,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:31:13,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:31:13,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:31:13,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:31:13,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:31:13,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:31:13,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:31:13,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:31:13,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:31:13,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:31:13,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:31:13,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:31:13,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:31:13,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:31:13,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:31:13,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:31:13,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:31:13,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:31:13,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:31:13,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:31:13,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:31:13,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:31:13,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:31:13,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:31:13,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:31:13,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:31:13,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:31:13,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:31:13,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:31:13,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:31:13,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:31:13,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:31:13,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:31:13,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:31:13,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:31:13,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:31:13,511 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-03 12:31:13,557 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:31:13,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:31:13,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:31:13,560 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:31:13,560 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:31:13,561 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:31:13,561 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:31:13,561 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:31:13,561 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:31:13,561 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:31:13,563 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:31:13,563 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:31:13,563 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:31:13,563 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:31:13,563 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:31:13,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:31:13,564 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:31:13,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:31:13,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:31:13,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:31:13,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:31:13,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:31:13,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:31:13,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:31:13,566 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:31:13,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:31:13,566 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:31:13,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:31:13,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:31:13,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:31:13,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:31:13,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:31:13,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:31:13,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:31:13,568 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:31:13,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:31:13,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:31:13,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:31:13,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:31:13,569 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_bed527fb-f335-4477-b572-fba2b367c0cb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22bfff7e0bc9ff374f4201c2281f2aec36cb181e [2020-12-03 12:31:13,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:31:13,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:31:13,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:31:13,906 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:31:13,907 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:31:13,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id2_b3_o2.c [2020-12-03 12:31:13,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/data/edd2440e2/fa2394eacca84d5fa76c447b5575dc68/FLAGb03334324 [2020-12-03 12:31:14,431 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:31:14,431 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/sv-benchmarks/c/recursive-simple/id2_b3_o2.c [2020-12-03 12:31:14,438 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/data/edd2440e2/fa2394eacca84d5fa76c447b5575dc68/FLAGb03334324 [2020-12-03 12:31:14,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/data/edd2440e2/fa2394eacca84d5fa76c447b5575dc68 [2020-12-03 12:31:14,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:31:14,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:31:14,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:31:14,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:31:14,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:31:14,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:31:14" (1/1) ... [2020-12-03 12:31:14,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7428ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:14, skipping insertion in model container [2020-12-03 12:31:14,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:31:14" (1/1) ... [2020-12-03 12:31:14,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:31:14,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:31:15,019 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/sv-benchmarks/c/recursive-simple/id2_b3_o2.c[771,784] [2020-12-03 12:31:15,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:31:15,032 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:31:15,049 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/sv-benchmarks/c/recursive-simple/id2_b3_o2.c[771,784] [2020-12-03 12:31:15,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:31:15,087 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:31:15,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15 WrapperNode [2020-12-03 12:31:15,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:31:15,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:31:15,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:31:15,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:31:15,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (1/1) ... [2020-12-03 12:31:15,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (1/1) ... [2020-12-03 12:31:15,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:31:15,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:31:15,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:31:15,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:31:15,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (1/1) ... [2020-12-03 12:31:15,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (1/1) ... [2020-12-03 12:31:15,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (1/1) ... [2020-12-03 12:31:15,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (1/1) ... [2020-12-03 12:31:15,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (1/1) ... [2020-12-03 12:31:15,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (1/1) ... [2020-12-03 12:31:15,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (1/1) ... [2020-12-03 12:31:15,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:31:15,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:31:15,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:31:15,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:31:15,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:31:15,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:31:15,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:31:15,246 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-12-03 12:31:15,246 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-12-03 12:31:15,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:31:15,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:31:15,247 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-03 12:31:15,247 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-03 12:31:15,639 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:31:15,652 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-03 12:31:15,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:31:15 BoogieIcfgContainer [2020-12-03 12:31:15,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:31:15,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:31:15,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:31:15,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:31:15,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:31:14" (1/3) ... [2020-12-03 12:31:15,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb06358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:31:15, skipping insertion in model container [2020-12-03 12:31:15,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:15" (2/3) ... [2020-12-03 12:31:15,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb06358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:31:15, skipping insertion in model container [2020-12-03 12:31:15,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:31:15" (3/3) ... [2020-12-03 12:31:15,687 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-12-03 12:31:15,704 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:31:15,707 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 12:31:15,727 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 12:31:15,776 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:31:15,776 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:31:15,777 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:31:15,777 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:31:15,777 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:31:15,777 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:31:15,777 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:31:15,777 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:31:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-03 12:31:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:31:15,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:31:15,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:31:15,800 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:31:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:31:15,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1546332850, now seen corresponding path program 1 times [2020-12-03 12:31:15,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:31:15,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549015027] [2020-12-03 12:31:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:31:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:31:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:31:16,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549015027] [2020-12-03 12:31:16,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:31:16,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:31:16,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929412026] [2020-12-03 12:31:16,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:31:16,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:31:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:31:16,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:31:16,206 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-12-03 12:31:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:31:16,292 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-12-03 12:31:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:31:16,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-03 12:31:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:31:16,307 INFO L225 Difference]: With dead ends: 30 [2020-12-03 12:31:16,307 INFO L226 Difference]: Without dead ends: 20 [2020-12-03 12:31:16,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:31:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-03 12:31:16,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-03 12:31:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-03 12:31:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-03 12:31:16,364 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2020-12-03 12:31:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:31:16,364 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-03 12:31:16,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:31:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-03 12:31:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-03 12:31:16,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:31:16,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:31:16,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:31:16,368 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:31:16,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:31:16,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1838329717, now seen corresponding path program 1 times [2020-12-03 12:31:16,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:31:16,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318623405] [2020-12-03 12:31:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:31:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:31:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:31:16,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318623405] [2020-12-03 12:31:16,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:31:16,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 12:31:16,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028146775] [2020-12-03 12:31:16,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 12:31:16,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:31:16,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 12:31:16,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:31:16,569 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2020-12-03 12:31:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:31:16,618 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-03 12:31:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:31:16,620 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-03 12:31:16,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:31:16,622 INFO L225 Difference]: With dead ends: 29 [2020-12-03 12:31:16,622 INFO L226 Difference]: Without dead ends: 25 [2020-12-03 12:31:16,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:31:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-03 12:31:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-12-03 12:31:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-03 12:31:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-03 12:31:16,637 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-12-03 12:31:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:31:16,637 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-03 12:31:16,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 12:31:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-03 12:31:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-03 12:31:16,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:31:16,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:31:16,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:31:16,641 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:31:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:31:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1146716592, now seen corresponding path program 1 times [2020-12-03 12:31:16,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:31:16,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033677057] [2020-12-03 12:31:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:31:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:31:16,729 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:31:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:31:16,771 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:31:16,795 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:31:16,795 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:31:16,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:31:16,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:31:16 BoogieIcfgContainer [2020-12-03 12:31:16,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:31:16,855 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:31:16,855 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:31:16,856 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:31:16,856 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:31:15" (3/4) ... [2020-12-03 12:31:16,858 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:31:16,946 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bed527fb-f335-4477-b572-fba2b367c0cb/bin/utaipan/witness.graphml [2020-12-03 12:31:16,949 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:31:16,951 INFO L168 Benchmark]: Toolchain (without parser) took 2125.77 ms. Allocated memory was 81.8 MB in the beginning and 107.0 MB in the end (delta: 25.2 MB). Free memory was 44.9 MB in the beginning and 49.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:16,952 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory is still 60.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:31:16,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.79 ms. Allocated memory was 81.8 MB in the beginning and 107.0 MB in the end (delta: 25.2 MB). Free memory was 44.7 MB in the beginning and 86.8 MB in the end (delta: -42.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:16,953 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.12 ms. Allocated memory is still 107.0 MB. Free memory was 86.8 MB in the beginning and 85.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:16,954 INFO L168 Benchmark]: Boogie Preprocessor took 21.08 ms. Allocated memory is still 107.0 MB. Free memory was 85.5 MB in the beginning and 84.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:31:16,954 INFO L168 Benchmark]: RCFGBuilder took 507.09 ms. Allocated memory is still 107.0 MB. Free memory was 84.4 MB in the beginning and 68.7 MB in the end (delta: 15.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:16,955 INFO L168 Benchmark]: TraceAbstraction took 1196.69 ms. Allocated memory is still 107.0 MB. Free memory was 68.1 MB in the beginning and 51.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:16,955 INFO L168 Benchmark]: Witness Printer took 94.15 ms. Allocated memory is still 107.0 MB. Free memory was 51.1 MB in the beginning and 49.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:16,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory is still 60.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 252.79 ms. Allocated memory was 81.8 MB in the beginning and 107.0 MB in the end (delta: 25.2 MB). Free memory was 44.7 MB in the beginning and 86.8 MB in the end (delta: -42.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.12 ms. Allocated memory is still 107.0 MB. Free memory was 86.8 MB in the beginning and 85.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.08 ms. Allocated memory is still 107.0 MB. Free memory was 85.5 MB in the beginning and 84.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 507.09 ms. Allocated memory is still 107.0 MB. Free memory was 84.4 MB in the beginning and 68.7 MB in the end (delta: 15.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1196.69 ms. Allocated memory is still 107.0 MB. Free memory was 68.1 MB in the beginning and 51.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * Witness Printer took 94.15 ms. Allocated memory is still 107.0 MB. Free memory was 51.1 MB in the beginning and 49.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] unsigned int input = __VERIFIER_nondet_uint(); [L25] CALL, EXPR id(input) VAL [\old(x)=2] [L10] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=1] [L17] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L18] CALL, EXPR id(x-1) VAL [\old(x)=0] [L10] COND TRUE x==0 [L10] return 0; VAL [\old(x)=0, \result=0, x=0] [L18] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L18] unsigned int ret = id(x-1) + 1; [L19] COND FALSE !(ret > 3) [L20] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L11] RET, EXPR id2(x-1) VAL [\old(x)=2, id2(x-1)=1, x=2] [L11] unsigned int ret = id2(x-1) + 1; [L12] COND FALSE !(ret > 3) [L13] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L25] RET, EXPR id(input) [L25] unsigned int result = id(input); [L26] COND TRUE result == 2 [L27] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 2 SDslu, 148 SDs, 0 SdLazy, 29 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...