./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test_while_int.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test_while_int.i -s /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/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 c7eba07debb0aad75be3d6c81175278352db792c ........................................................................................................................................................................................................................................................................................................................................................ 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-a4ecdab [2020-11-28 07:36:09,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:36:09,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:36:09,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:36:09,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:36:09,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:36:09,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:36:09,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:36:09,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:36:09,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:36:09,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:36:09,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:36:09,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:36:09,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:36:09,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:36:09,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:36:09,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:36:09,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:36:09,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:36:09,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:36:09,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:36:09,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:36:09,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:36:09,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:36:09,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:36:09,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:36:09,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:36:09,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:36:09,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:36:09,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:36:09,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:36:09,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:36:09,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:36:09,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:36:09,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:36:09,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:36:09,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:36:09,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:36:09,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:36:09,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:36:09,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:36:09,497 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:36:09,550 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:36:09,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:36:09,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:36:09,553 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:36:09,553 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:36:09,553 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:36:09,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:36:09,554 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:36:09,554 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:36:09,554 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:36:09,555 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:36:09,556 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:36:09,556 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:36:09,556 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:36:09,556 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:36:09,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:36:09,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:36:09,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:36:09,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:36:09,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:36:09,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:36:09,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:36:09,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:36:09,559 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:36:09,559 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:36:09,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:36:09,560 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:36:09,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:36:09,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:36:09,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:36:09,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:36:09,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:36:09,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:36:09,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:36:09,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:36:09,563 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:36:09,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:36:09,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:36:09,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:36:09,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:36:09,564 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_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7eba07debb0aad75be3d6c81175278352db792c [2020-11-28 07:36:09,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:36:09,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:36:09,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:36:09,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:36:09,893 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:36:09,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/../../sv-benchmarks/c/ldv-regression/test_while_int.i [2020-11-28 07:36:09,976 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/data/9dbecb553/fb7c9d2f62404180b2da257a77bdc6c7/FLAG2c2c72df6 [2020-11-28 07:36:10,454 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:36:10,455 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/sv-benchmarks/c/ldv-regression/test_while_int.i [2020-11-28 07:36:10,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/data/9dbecb553/fb7c9d2f62404180b2da257a77bdc6c7/FLAG2c2c72df6 [2020-11-28 07:36:10,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/data/9dbecb553/fb7c9d2f62404180b2da257a77bdc6c7 [2020-11-28 07:36:10,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:36:10,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:36:10,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:36:10,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:36:10,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:36:10,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:36:10" (1/1) ... [2020-11-28 07:36:10,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f059c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:10, skipping insertion in model container [2020-11-28 07:36:10,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:36:10" (1/1) ... [2020-11-28 07:36:10,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:36:10,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:36:11,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:36:11,064 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:36:11,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:36:11,090 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:36:11,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11 WrapperNode [2020-11-28 07:36:11,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:36:11,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:36:11,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:36:11,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:36:11,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (1/1) ... [2020-11-28 07:36:11,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (1/1) ... [2020-11-28 07:36:11,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:36:11,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:36:11,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:36:11,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:36:11,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (1/1) ... [2020-11-28 07:36:11,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (1/1) ... [2020-11-28 07:36:11,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (1/1) ... [2020-11-28 07:36:11,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (1/1) ... [2020-11-28 07:36:11,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (1/1) ... [2020-11-28 07:36:11,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (1/1) ... [2020-11-28 07:36:11,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (1/1) ... [2020-11-28 07:36:11,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:36:11,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:36:11,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:36:11,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:36:11,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:36:11,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:36:11,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:36:11,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:36:11,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:36:11,448 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:36:11,449 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-28 07:36:11,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:11 BoogieIcfgContainer [2020-11-28 07:36:11,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:36:11,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:36:11,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:36:11,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:36:11,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:36:10" (1/3) ... [2020-11-28 07:36:11,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6886653e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:36:11, skipping insertion in model container [2020-11-28 07:36:11,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:11" (2/3) ... [2020-11-28 07:36:11,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6886653e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:36:11, skipping insertion in model container [2020-11-28 07:36:11,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:11" (3/3) ... [2020-11-28 07:36:11,478 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-11-28 07:36:11,489 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:36:11,506 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:36:11,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:36:11,572 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:36:11,574 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:36:11,574 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:36:11,574 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:36:11,574 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:36:11,574 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:36:11,575 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:36:11,575 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:36:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-11-28 07:36:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:36:11,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:11,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:36:11,600 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:11,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1858127, now seen corresponding path program 1 times [2020-11-28 07:36:11,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:11,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897283639] [2020-11-28 07:36:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:11,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897283639] [2020-11-28 07:36:11,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:11,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:36:11,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603847323] [2020-11-28 07:36:11,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:36:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:11,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:36:11,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:11,908 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2020-11-28 07:36:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:12,003 INFO L93 Difference]: Finished difference Result 13 states and 17 transitions. [2020-11-28 07:36:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:36:12,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-28 07:36:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:12,025 INFO L225 Difference]: With dead ends: 13 [2020-11-28 07:36:12,036 INFO L226 Difference]: Without dead ends: 7 [2020-11-28 07:36:12,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-28 07:36:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-28 07:36:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 07:36:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-11-28 07:36:12,087 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2020-11-28 07:36:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:12,088 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-11-28 07:36:12,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:36:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-11-28 07:36:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:36:12,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:12,090 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-11-28 07:36:12,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:36:12,090 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:12,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1785594252, now seen corresponding path program 1 times [2020-11-28 07:36:12,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:12,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697792602] [2020-11-28 07:36:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:12,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697792602] [2020-11-28 07:36:12,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080424921] [2020-11-28 07:36:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:36:12,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:12,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:36:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:12,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:12,467 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:12,471 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:12,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012418671] [2020-11-28 07:36:12,503 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-11-28 07:36:12,503 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:36:12,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:36:12,511 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:36:12,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:36:13,041 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:36:13,235 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-11-28 07:36:13,558 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-11-28 07:36:13,662 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:36:13,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:36:13,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2020-11-28 07:36:13,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918754779] [2020-11-28 07:36:13,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:36:13,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:13,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:36:13,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:36:13,667 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2020-11-28 07:36:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:13,708 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-11-28 07:36:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:36:13,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2020-11-28 07:36:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:13,710 INFO L225 Difference]: With dead ends: 12 [2020-11-28 07:36:13,710 INFO L226 Difference]: Without dead ends: 10 [2020-11-28 07:36:13,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:36:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-28 07:36:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-11-28 07:36:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-28 07:36:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-11-28 07:36:13,714 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-11-28 07:36:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:13,715 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-11-28 07:36:13,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:36:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-11-28 07:36:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:36:13,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:13,716 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2020-11-28 07:36:13,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 07:36:13,917 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:13,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:13,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2030908023, now seen corresponding path program 2 times [2020-11-28 07:36:13,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:13,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008166761] [2020-11-28 07:36:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:36:13,935 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:36:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:36:13,962 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:36:13,979 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:36:13,980 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:36:13,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-28 07:36:14,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:36:14 BoogieIcfgContainer [2020-11-28 07:36:14,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:36:14,007 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:36:14,007 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:36:14,008 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:36:14,008 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:11" (3/4) ... [2020-11-28 07:36:14,010 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:36:14,069 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fc7ce7f1-10e2-4ac9-aa96-113ca8a5fd8d/bin/utaipan/witness.graphml [2020-11-28 07:36:14,071 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:36:14,072 INFO L168 Benchmark]: Toolchain (without parser) took 3232.04 ms. Allocated memory was 119.5 MB in the beginning and 151.0 MB in the end (delta: 31.5 MB). Free memory was 92.1 MB in the beginning and 51.1 MB in the end (delta: 41.0 MB). Peak memory consumption was 69.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:14,072 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 119.5 MB. Free memory is still 76.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:14,073 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.70 ms. Allocated memory is still 119.5 MB. Free memory was 92.0 MB in the beginning and 94.6 MB in the end (delta: -2.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:14,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.04 ms. Allocated memory is still 119.5 MB. Free memory was 94.4 MB in the beginning and 93.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:14,074 INFO L168 Benchmark]: Boogie Preprocessor took 18.60 ms. Allocated memory is still 119.5 MB. Free memory was 93.1 MB in the beginning and 92.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:14,075 INFO L168 Benchmark]: RCFGBuilder took 309.70 ms. Allocated memory is still 119.5 MB. Free memory was 92.1 MB in the beginning and 79.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:14,075 INFO L168 Benchmark]: TraceAbstraction took 2554.68 ms. Allocated memory was 119.5 MB in the beginning and 151.0 MB in the end (delta: 31.5 MB). Free memory was 79.2 MB in the beginning and 53.2 MB in the end (delta: 26.0 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:14,076 INFO L168 Benchmark]: Witness Printer took 63.63 ms. Allocated memory is still 151.0 MB. Free memory was 52.2 MB in the beginning and 51.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:14,079 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 119.5 MB. Free memory is still 76.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.70 ms. Allocated memory is still 119.5 MB. Free memory was 92.0 MB in the beginning and 94.6 MB in the end (delta: -2.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.04 ms. Allocated memory is still 119.5 MB. Free memory was 94.4 MB in the beginning and 93.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.60 ms. Allocated memory is still 119.5 MB. Free memory was 93.1 MB in the beginning and 92.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 309.70 ms. Allocated memory is still 119.5 MB. Free memory was 92.1 MB in the beginning and 79.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2554.68 ms. Allocated memory was 119.5 MB in the beginning and 151.0 MB in the end (delta: 31.5 MB). Free memory was 79.2 MB in the beginning and 53.2 MB in the end (delta: 26.0 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.1 GB. * Witness Printer took 63.63 ms. Allocated memory is still 151.0 MB. Free memory was 52.2 MB in the beginning and 51.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int i=0; [L26] COND TRUE i<5 [L27] i++ [L20] (b) ? (0) : __blast_assert () [L26] COND TRUE i<5 [L27] i++ [L20] (b) ? (0) : __blast_assert () [L26] COND TRUE i<5 [L27] i++ [L20] (b) ? (0) : __blast_assert () [L3] __assert_fail("0", "test_while_int.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 4 SDslu, 12 SDs, 0 SdLazy, 23 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 224 SizeOfPredicates, 3 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 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...