./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_o3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02fc4bd1d36800792ed4ab31b3ee599492a65576 ................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-5485861 [2020-10-25 23:12:10,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 23:12:10,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 23:12:10,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 23:12:10,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 23:12:10,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 23:12:10,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 23:12:10,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 23:12:10,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 23:12:10,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 23:12:10,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 23:12:10,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 23:12:10,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 23:12:10,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 23:12:10,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 23:12:10,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 23:12:10,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 23:12:10,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 23:12:10,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 23:12:10,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 23:12:10,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 23:12:10,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 23:12:10,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 23:12:10,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 23:12:10,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 23:12:10,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 23:12:10,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 23:12:10,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 23:12:10,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 23:12:10,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 23:12:10,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 23:12:10,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 23:12:10,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 23:12:10,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 23:12:10,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 23:12:10,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 23:12:10,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 23:12:10,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 23:12:10,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 23:12:10,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 23:12:10,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 23:12:10,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 23:12:10,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 23:12:10,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 23:12:10,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 23:12:10,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 23:12:10,192 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 23:12:10,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 23:12:10,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 23:12:10,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 23:12:10,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 23:12:10,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 23:12:10,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 23:12:10,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 23:12:10,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 23:12:10,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 23:12:10,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 23:12:10,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 23:12:10,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 23:12:10,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 23:12:10,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 23:12:10,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 23:12:10,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 23:12:10,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:12:10,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 23:12:10,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 23:12:10,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 23:12:10,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 23:12:10,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 23:12:10,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 23:12:10,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 23:12:10,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02fc4bd1d36800792ed4ab31b3ee599492a65576 [2020-10-25 23:12:10,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 23:12:10,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 23:12:10,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 23:12:10,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 23:12:10,617 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 23:12:10,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o3.c [2020-10-25 23:12:10,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7303cacca/f86846363163464ca94fb76b2dc57a08/FLAGa02792916 [2020-10-25 23:12:11,245 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 23:12:11,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o3.c [2020-10-25 23:12:11,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7303cacca/f86846363163464ca94fb76b2dc57a08/FLAGa02792916 [2020-10-25 23:12:11,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7303cacca/f86846363163464ca94fb76b2dc57a08 [2020-10-25 23:12:11,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 23:12:11,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 23:12:11,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 23:12:11,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 23:12:11,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 23:12:11,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:11,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14802add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11, skipping insertion in model container [2020-10-25 23:12:11,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:11,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 23:12:11,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 23:12:11,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:12:11,913 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 23:12:11,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:12:11,945 INFO L208 MainTranslator]: Completed translation [2020-10-25 23:12:11,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11 WrapperNode [2020-10-25 23:12:11,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 23:12:11,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 23:12:11,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 23:12:11,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 23:12:11,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:11,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:11,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 23:12:11,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 23:12:11,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 23:12:11,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 23:12:11,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:11,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:12,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:12,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:12,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:12,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:12,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (1/1) ... [2020-10-25 23:12:12,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 23:12:12,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 23:12:12,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 23:12:12,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 23:12:12,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 23:12:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 23:12:12,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 23:12:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 23:12:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-25 23:12:12,104 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-25 23:12:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 23:12:12,327 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 23:12:12,327 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-25 23:12:12,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:12:12 BoogieIcfgContainer [2020-10-25 23:12:12,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 23:12:12,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 23:12:12,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 23:12:12,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 23:12:12,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 11:12:11" (1/3) ... [2020-10-25 23:12:12,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ca70a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:12:12, skipping insertion in model container [2020-10-25 23:12:12,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:11" (2/3) ... [2020-10-25 23:12:12,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ca70a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:12:12, skipping insertion in model container [2020-10-25 23:12:12,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:12:12" (3/3) ... [2020-10-25 23:12:12,337 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o3.c [2020-10-25 23:12:12,350 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 23:12:12,359 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 23:12:12,392 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 23:12:12,438 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 23:12:12,439 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 23:12:12,439 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 23:12:12,439 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 23:12:12,440 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 23:12:12,440 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 23:12:12,440 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 23:12:12,440 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 23:12:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-25 23:12:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 23:12:12,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:12,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:12,467 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-10-25 23:12:12,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:12,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517409279] [2020-10-25 23:12:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 23:12:12,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517409279] [2020-10-25 23:12:12,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 23:12:12,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-25 23:12:12,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330870082] [2020-10-25 23:12:12,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 23:12:12,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:13,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 23:12:13,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-25 23:12:13,006 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-10-25 23:12:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:13,085 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-25 23:12:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 23:12:13,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-25 23:12:13,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:13,112 INFO L225 Difference]: With dead ends: 29 [2020-10-25 23:12:13,112 INFO L226 Difference]: Without dead ends: 15 [2020-10-25 23:12:13,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-25 23:12:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-25 23:12:13,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-25 23:12:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-25 23:12:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-25 23:12:13,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-10-25 23:12:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:13,178 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-25 23:12:13,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 23:12:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-25 23:12:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 23:12:13,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:13,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:13,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 23:12:13,182 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:13,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:13,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-10-25 23:12:13,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:13,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757835601] [2020-10-25 23:12:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 23:12:13,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757835601] [2020-10-25 23:12:13,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151530392] [2020-10-25 23:12:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 23:12:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-25 23:12:13,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 23:12:13,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:13,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-25 23:12:13,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578554470] [2020-10-25 23:12:13,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 23:12:13,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:13,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 23:12:13,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-25 23:12:13,626 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-10-25 23:12:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:13,672 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-10-25 23:12:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 23:12:13,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-25 23:12:13,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:13,675 INFO L225 Difference]: With dead ends: 22 [2020-10-25 23:12:13,675 INFO L226 Difference]: Without dead ends: 18 [2020-10-25 23:12:13,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-25 23:12:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-25 23:12:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-25 23:12:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 23:12:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-25 23:12:13,689 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-25 23:12:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:13,689 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-25 23:12:13,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 23:12:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-25 23:12:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-25 23:12:13,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:13,693 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:13,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 23:12:13,908 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-10-25 23:12:13,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:13,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308116903] [2020-10-25 23:12:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 23:12:14,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308116903] [2020-10-25 23:12:14,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734365279] [2020-10-25 23:12:14,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 23:12:14,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 23:12:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:14,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-25 23:12:14,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 23:12:14,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:14,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-25 23:12:14,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146922586] [2020-10-25 23:12:14,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 23:12:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 23:12:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-25 23:12:14,288 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-10-25 23:12:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:14,335 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-25 23:12:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 23:12:14,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-25 23:12:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:14,337 INFO L225 Difference]: With dead ends: 25 [2020-10-25 23:12:14,337 INFO L226 Difference]: Without dead ends: 21 [2020-10-25 23:12:14,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-25 23:12:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-25 23:12:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-25 23:12:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-25 23:12:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-25 23:12:14,345 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-10-25 23:12:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:14,346 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-25 23:12:14,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 23:12:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-25 23:12:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-25 23:12:14,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:14,348 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:14,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:14,562 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:14,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-10-25 23:12:14,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:14,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483074447] [2020-10-25 23:12:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 23:12:14,593 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 23:12:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 23:12:14,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 23:12:14,638 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 23:12:14,638 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 23:12:14,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-25 23:12:14,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 11:12:14 BoogieIcfgContainer [2020-10-25 23:12:14,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 23:12:14,679 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 23:12:14,680 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 23:12:14,680 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 23:12:14,680 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:12:12" (3/4) ... [2020-10-25 23:12:14,683 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 23:12:14,734 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 23:12:14,735 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 23:12:14,737 INFO L168 Benchmark]: Toolchain (without parser) took 3093.19 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 26.2 MB in the beginning and 38.3 MB in the end (delta: -12.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:14,738 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 35.7 MB. Free memory was 18.4 MB in the beginning and 18.3 MB in the end (delta: 31.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:12:14,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.76 ms. Allocated memory is still 48.2 MB. Free memory was 25.5 MB in the beginning and 27.8 MB in the end (delta: -2.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:14,739 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.57 ms. Allocated memory is still 48.2 MB. Free memory was 27.8 MB in the beginning and 26.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:12:14,740 INFO L168 Benchmark]: Boogie Preprocessor took 21.41 ms. Allocated memory is still 48.2 MB. Free memory was 26.5 MB in the beginning and 25.5 MB in the end (delta: 939.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:14,741 INFO L168 Benchmark]: RCFGBuilder took 319.03 ms. Allocated memory is still 48.2 MB. Free memory was 25.5 MB in the beginning and 26.4 MB in the end (delta: -811.0 kB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:14,742 INFO L168 Benchmark]: TraceAbstraction took 2348.66 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 26.0 MB in the beginning and 40.9 MB in the end (delta: -14.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:14,742 INFO L168 Benchmark]: Witness Printer took 55.80 ms. Allocated memory is still 71.3 MB. Free memory was 40.9 MB in the beginning and 38.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:14,746 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 35.7 MB. Free memory was 18.4 MB in the beginning and 18.3 MB in the end (delta: 31.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.76 ms. Allocated memory is still 48.2 MB. Free memory was 25.5 MB in the beginning and 27.8 MB in the end (delta: -2.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.57 ms. Allocated memory is still 48.2 MB. Free memory was 27.8 MB in the beginning and 26.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.41 ms. Allocated memory is still 48.2 MB. Free memory was 26.5 MB in the beginning and 25.5 MB in the end (delta: 939.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 319.03 ms. Allocated memory is still 48.2 MB. Free memory was 25.5 MB in the beginning and 26.4 MB in the end (delta: -811.0 kB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2348.66 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 26.0 MB in the beginning and 40.9 MB in the end (delta: -14.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Witness Printer took 55.80 ms. Allocated memory is still 71.3 MB. Free memory was 40.9 MB in the beginning and 38.3 MB in the end (delta: 2.6 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: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] unsigned int result = id(input); [L14] COND TRUE result == 3 [L4] __assert_fail("0", "id_o3.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 45 SDtfs, 3 SDslu, 198 SDs, 0 SdLazy, 60 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 5481 SizeOfPredicates, 2 NumberOfNonLiveVariables, 138 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 18/36 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...