./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/nec20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/loops/nec20.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a2cd7cd32168bcfd44c5ed14b95671353415deb ...................................................................................................................................................................................................................................................................................................................... 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-f470102 [2019-11-28 17:03:45,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:03:45,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:03:45,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:03:45,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:03:45,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:03:45,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:03:45,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:03:45,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:03:45,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:03:45,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:03:45,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:03:45,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:03:45,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:03:45,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:03:45,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:03:45,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:03:45,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:03:45,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:03:45,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:03:45,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:03:45,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:03:45,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:03:45,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:03:45,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:03:45,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:03:45,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:03:45,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:03:45,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:03:45,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:03:45,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:03:45,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:03:45,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:03:45,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:03:45,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:03:45,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:03:45,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:03:45,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:03:45,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:03:45,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:03:45,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:03:45,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:03:45,731 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:03:45,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:03:45,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:03:45,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:03:45,733 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:03:45,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:03:45,734 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:03:45,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:03:45,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:03:45,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:03:45,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:03:45,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:03:45,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:03:45,736 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:03:45,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:03:45,736 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:03:45,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:03:45,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:03:45,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:03:45,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:03:45,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:03:45,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:03:45,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:03:45,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:03:45,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:03:45,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:03:45,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:03:45,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:03:45,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:03:45,740 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(__VERIFIER_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 -> 9a2cd7cd32168bcfd44c5ed14b95671353415deb [2019-11-28 17:03:46,021 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:03:46,034 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:03:46,038 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:03:46,039 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:03:46,040 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:03:46,040 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec20.c [2019-11-28 17:03:46,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f32373a2/ec0878d4eee8477da1fe62f997dae0fb/FLAGb2758447c [2019-11-28 17:03:46,522 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:03:46,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec20.c [2019-11-28 17:03:46,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f32373a2/ec0878d4eee8477da1fe62f997dae0fb/FLAGb2758447c [2019-11-28 17:03:46,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f32373a2/ec0878d4eee8477da1fe62f997dae0fb [2019-11-28 17:03:46,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:03:46,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:03:46,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:03:46,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:03:46,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:03:46,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:03:46" (1/1) ... [2019-11-28 17:03:46,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a6e3ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:46, skipping insertion in model container [2019-11-28 17:03:46,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:03:46" (1/1) ... [2019-11-28 17:03:46,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:03:46,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:03:47,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:03:47,164 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:03:47,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:03:47,201 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:03:47,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47 WrapperNode [2019-11-28 17:03:47,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:03:47,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:03:47,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:03:47,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:03:47,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (1/1) ... [2019-11-28 17:03:47,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (1/1) ... [2019-11-28 17:03:47,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:03:47,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:03:47,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:03:47,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:03:47,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (1/1) ... [2019-11-28 17:03:47,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (1/1) ... [2019-11-28 17:03:47,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (1/1) ... [2019-11-28 17:03:47,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (1/1) ... [2019-11-28 17:03:47,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (1/1) ... [2019-11-28 17:03:47,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (1/1) ... [2019-11-28 17:03:47,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (1/1) ... [2019-11-28 17:03:47,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:03:47,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:03:47,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:03:47,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:03:47,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (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 [2019-11-28 17:03:47,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:03:47,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:03:47,586 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:03:47,586 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-28 17:03:47,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:47 BoogieIcfgContainer [2019-11-28 17:03:47,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:03:47,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:03:47,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:03:47,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:03:47,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:03:46" (1/3) ... [2019-11-28 17:03:47,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250b6065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:03:47, skipping insertion in model container [2019-11-28 17:03:47,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:47" (2/3) ... [2019-11-28 17:03:47,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250b6065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:03:47, skipping insertion in model container [2019-11-28 17:03:47,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:47" (3/3) ... [2019-11-28 17:03:47,613 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2019-11-28 17:03:47,625 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:03:47,632 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:03:47,650 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:03:47,679 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:03:47,680 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:03:47,680 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:03:47,680 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:03:47,681 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:03:47,681 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:03:47,681 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:03:47,681 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:03:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-28 17:03:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:03:47,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:47,704 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:47,705 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:47,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash -592064849, now seen corresponding path program 1 times [2019-11-28 17:03:47,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:47,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981486468] [2019-11-28 17:03:47,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:47,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981486468] [2019-11-28 17:03:47,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:03:47,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 17:03:47,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580016251] [2019-11-28 17:03:47,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:03:47,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:03:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:03:48,022 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-11-28 17:03:48,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:48,144 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2019-11-28 17:03:48,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 17:03:48,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-28 17:03:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:48,159 INFO L225 Difference]: With dead ends: 43 [2019-11-28 17:03:48,160 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 17:03:48,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:03:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 17:03:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-28 17:03:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 17:03:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-28 17:03:48,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2019-11-28 17:03:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:48,201 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-28 17:03:48,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:03:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-28 17:03:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:03:48,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:48,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:48,203 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1182942513, now seen corresponding path program 1 times [2019-11-28 17:03:48,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:48,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533111190] [2019-11-28 17:03:48,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:48,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533111190] [2019-11-28 17:03:48,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:03:48,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 17:03:48,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153523764] [2019-11-28 17:03:48,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:03:48,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:48,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:03:48,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:03:48,338 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2019-11-28 17:03:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:48,403 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-11-28 17:03:48,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 17:03:48,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-28 17:03:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:48,405 INFO L225 Difference]: With dead ends: 23 [2019-11-28 17:03:48,405 INFO L226 Difference]: Without dead ends: 19 [2019-11-28 17:03:48,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:03:48,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-28 17:03:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 11. [2019-11-28 17:03:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 17:03:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-28 17:03:48,410 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2019-11-28 17:03:48,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:48,410 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-28 17:03:48,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:03:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-28 17:03:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 17:03:48,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:48,412 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:48,412 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:48,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1172475752, now seen corresponding path program 1 times [2019-11-28 17:03:48,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:48,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716358103] [2019-11-28 17:03:48,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:03:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:03:48,476 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:03:48,476 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:03:48,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:03:48 BoogieIcfgContainer [2019-11-28 17:03:48,501 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:03:48,501 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:03:48,501 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:03:48,501 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:03:48,502 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:47" (3/4) ... [2019-11-28 17:03:48,504 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:03:48,568 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:03:48,568 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:03:48,572 INFO L168 Benchmark]: Toolchain (without parser) took 1645.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -113.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:48,573 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:03:48,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.35 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:48,577 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -200.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:48,580 INFO L168 Benchmark]: Boogie Preprocessor took 30.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:48,580 INFO L168 Benchmark]: RCFGBuilder took 267.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:48,581 INFO L168 Benchmark]: TraceAbstraction took 912.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 52.6 MB). Peak memory consumption was 52.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:48,582 INFO L168 Benchmark]: Witness Printer took 67.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:03:48,593 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 276.35 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 87.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -200.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 267.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 912.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 52.6 MB). Peak memory consumption was 52.6 MB. Max. memory is 11.5 GB. * Witness Printer took 67.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int b; VAL [b=0] [L13] _Bool k=__VERIFIER_nondet_bool(); [L14] unsigned int i,n,j; [L15] int a[1025]; VAL [b=0] [L17] COND TRUE \read(k) [L18] n=0 VAL [b=0] [L23] i=0 [L24] j=__VERIFIER_nondet_uint() [L25] COND FALSE !(j > 10000) VAL [b=0] [L28] COND TRUE i <= n [L29] i++ [L30] j= j +2 VAL [b=0] [L28] COND FALSE !(i <= n) VAL [b=0] [L33] a[i]=0 [L5] COND TRUE !(cond) VAL [b=0] [L6] __VERIFIER_error() VAL [b=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 27 SDslu, 47 SDs, 0 SdLazy, 31 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 736 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...