./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 9a8b2e8d 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_1.3.100.v20150511-1540.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/ldv-regression/test_while_int.i -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 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 0.1.25-9a8b2e8 [2020-10-20 00:44:23,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:44:23,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:44:23,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:44:23,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:44:23,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:44:23,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:44:23,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:44:23,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:44:23,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:44:23,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:44:23,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:44:23,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:44:23,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:44:23,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:44:23,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:44:23,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:44:23,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:44:23,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:44:23,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:44:23,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:44:23,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:44:23,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:44:23,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:44:23,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:44:23,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:44:23,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:44:23,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:44:23,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:44:23,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:44:23,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:44:23,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:44:23,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:44:23,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:44:23,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:44:23,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:44:23,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:44:23,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:44:23,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:44:23,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:44:23,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:44:23,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:44:23,390 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:44:23,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:44:23,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:44:23,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:44:23,392 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:44:23,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:44:23,392 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:44:23,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:44:23,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:44:23,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:44:23,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:44:23,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:44:23,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:44:23,393 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:44:23,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:44:23,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:44:23,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:44:23,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:44:23,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:44:23,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:44:23,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:44:23,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:44:23,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:44:23,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:44:23,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:44:23,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:44:23,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:44:23,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:44:23,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:44:23,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> c7eba07debb0aad75be3d6c81175278352db792c [2020-10-20 00:44:23,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:44:23,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:44:23,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:44:23,684 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:44:23,686 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:44:23,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test_while_int.i [2020-10-20 00:44:23,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11517b101/6d054de2c4e54f0ea1046c396152401d/FLAG783df8364 [2020-10-20 00:44:24,173 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:44:24,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test_while_int.i [2020-10-20 00:44:24,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11517b101/6d054de2c4e54f0ea1046c396152401d/FLAG783df8364 [2020-10-20 00:44:24,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11517b101/6d054de2c4e54f0ea1046c396152401d [2020-10-20 00:44:24,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:44:24,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:44:24,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:44:24,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:44:24,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:44:24,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b735c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24, skipping insertion in model container [2020-10-20 00:44:24,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:44:24,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:44:24,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:44:24,834 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:44:24,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:44:24,865 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:44:24,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24 WrapperNode [2020-10-20 00:44:24,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:44:24,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:44:24,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:44:24,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:44:24,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:44:24,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:44:24,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:44:24,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:44:24,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (1/1) ... [2020-10-20 00:44:24,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:44:24,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:44:24,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:44:24,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:44:24,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (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 [2020-10-20 00:44:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:44:24,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:44:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:44:24,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:44:25,223 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:44:25,224 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-20 00:44:25,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:44:25 BoogieIcfgContainer [2020-10-20 00:44:25,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:44:25,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:44:25,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:44:25,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:44:25,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:44:24" (1/3) ... [2020-10-20 00:44:25,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c306fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:44:25, skipping insertion in model container [2020-10-20 00:44:25,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:24" (2/3) ... [2020-10-20 00:44:25,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c306fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:44:25, skipping insertion in model container [2020-10-20 00:44:25,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:44:25" (3/3) ... [2020-10-20 00:44:25,236 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-10-20 00:44:25,249 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:44:25,257 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:44:25,277 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:44:25,338 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:44:25,338 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:44:25,341 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:44:25,341 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:44:25,341 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:44:25,342 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:44:25,342 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:44:25,342 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:44:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-10-20 00:44:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-20 00:44:25,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:25,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-20 00:44:25,367 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:25,374 INFO L82 PathProgramCache]: Analyzing trace with hash 28699818, now seen corresponding path program 1 times [2020-10-20 00:44:25,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:25,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107775290] [2020-10-20 00:44:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:25,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107775290] [2020-10-20 00:44:25,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:44:25,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:44:25,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708820013] [2020-10-20 00:44:25,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:44:25,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:25,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:44:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:44:25,618 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-10-20 00:44:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:25,666 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2020-10-20 00:44:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:44:25,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-10-20 00:44:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:25,679 INFO L225 Difference]: With dead ends: 21 [2020-10-20 00:44:25,679 INFO L226 Difference]: Without dead ends: 8 [2020-10-20 00:44:25,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:44:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-20 00:44:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-20 00:44:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 00:44:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-10-20 00:44:25,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2020-10-20 00:44:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:25,727 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-10-20 00:44:25,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:44:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-10-20 00:44:25,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:44:25,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:25,728 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-10-20 00:44:25,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:44:25,728 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:25,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:25,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1810655527, now seen corresponding path program 1 times [2020-10-20 00:44:25,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:25,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956816616] [2020-10-20 00:44:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:25,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956816616] [2020-10-20 00:44:25,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813431059] [2020-10-20 00:44:25,796 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 [2020-10-20 00:44:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:25,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:44:25,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:26,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:44:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:26,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:26,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-20 00:44:26,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245845031] [2020-10-20 00:44:26,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:44:26,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:26,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:44:26,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:44:26,052 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2020-10-20 00:44:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:26,102 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-10-20 00:44:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:44:26,103 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-10-20 00:44:26,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:26,104 INFO L225 Difference]: With dead ends: 13 [2020-10-20 00:44:26,104 INFO L226 Difference]: Without dead ends: 11 [2020-10-20 00:44:26,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:44:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-20 00:44:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-10-20 00:44:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 00:44:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-10-20 00:44:26,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-10-20 00:44:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:26,113 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-10-20 00:44:26,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:44:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-10-20 00:44:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 00:44:26,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:26,116 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2020-10-20 00:44:26,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-20 00:44:26,317 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:26,319 INFO L82 PathProgramCache]: Analyzing trace with hash 578140772, now seen corresponding path program 2 times [2020-10-20 00:44:26,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:26,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090567576] [2020-10-20 00:44:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:44:26,342 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:44:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:44:26,362 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:44:26,389 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:44:26,389 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:44:26,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:44:26,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:44:26 BoogieIcfgContainer [2020-10-20 00:44:26,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:44:26,423 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:44:26,423 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:44:26,423 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:44:26,424 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:44:25" (3/4) ... [2020-10-20 00:44:26,426 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:44:26,473 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:44:26,473 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:44:26,476 INFO L168 Benchmark]: Toolchain (without parser) took 1942.46 ms. Allocated memory was 33.6 MB in the beginning and 49.3 MB in the end (delta: 15.7 MB). Free memory was 6.9 MB in the beginning and 15.2 MB in the end (delta: -8.3 MB). Peak memory consumption was 7.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:26,477 INFO L168 Benchmark]: CDTParser took 0.66 ms. Allocated memory is still 33.6 MB. Free memory was 11.9 MB in the beginning and 11.8 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:44:26,478 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.43 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 18.7 MB in the beginning and 26.7 MB in the end (delta: -8.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:26,479 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.38 ms. Allocated memory is still 44.0 MB. Free memory was 26.6 MB in the beginning and 25.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:26,480 INFO L168 Benchmark]: Boogie Preprocessor took 21.44 ms. Allocated memory is still 44.0 MB. Free memory was 25.0 MB in the beginning and 23.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:26,481 INFO L168 Benchmark]: RCFGBuilder took 303.73 ms. Allocated memory was 44.0 MB in the beginning and 46.7 MB in the end (delta: 2.6 MB). Free memory was 23.7 MB in the beginning and 26.2 MB in the end (delta: -2.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:26,482 INFO L168 Benchmark]: TraceAbstraction took 1194.77 ms. Allocated memory was 46.7 MB in the beginning and 49.3 MB in the end (delta: 2.6 MB). Free memory was 25.8 MB in the beginning and 17.3 MB in the end (delta: 8.5 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:26,482 INFO L168 Benchmark]: Witness Printer took 50.55 ms. Allocated memory is still 49.3 MB. Free memory was 17.3 MB in the beginning and 15.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:26,487 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66 ms. Allocated memory is still 33.6 MB. Free memory was 11.9 MB in the beginning and 11.8 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 316.43 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 18.7 MB in the beginning and 26.7 MB in the end (delta: -8.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 34.38 ms. Allocated memory is still 44.0 MB. Free memory was 26.6 MB in the beginning and 25.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 21.44 ms. Allocated memory is still 44.0 MB. Free memory was 25.0 MB in the beginning and 23.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 303.73 ms. Allocated memory was 44.0 MB in the beginning and 46.7 MB in the end (delta: 2.6 MB). Free memory was 23.7 MB in the beginning and 26.2 MB in the end (delta: -2.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1194.77 ms. Allocated memory was 46.7 MB in the beginning and 49.3 MB in the end (delta: 2.6 MB). Free memory was 25.8 MB in the beginning and 17.3 MB in the end (delta: 8.5 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. * Witness Printer took 50.55 ms. Allocated memory is still 49.3 MB. Free memory was 17.3 MB in the beginning and 15.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 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, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 9 SDslu, 18 SDs, 0 SdLazy, 19 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, 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, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 210 SizeOfPredicates, 3 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 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...