./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/nec11.c --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8bd4bc60 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -ea -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/nec11.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 956956519a5dd5945389347ef99ef2322ddc4acd ....................................................................................................................................................................................................................................................................................................................... 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 0.1.25-8bd4bc6 [2020-07-28 18:11:49,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-28 18:11:49,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-28 18:11:49,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-28 18:11:49,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-28 18:11:49,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-28 18:11:49,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-28 18:11:49,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-28 18:11:49,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-28 18:11:49,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-28 18:11:49,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-28 18:11:49,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-28 18:11:49,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-28 18:11:49,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-28 18:11:49,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-28 18:11:49,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-28 18:11:49,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-28 18:11:49,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-28 18:11:49,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-28 18:11:49,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-28 18:11:49,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-28 18:11:49,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-28 18:11:49,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-28 18:11:49,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-28 18:11:49,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-28 18:11:49,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-28 18:11:49,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-28 18:11:49,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-28 18:11:49,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-28 18:11:49,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-28 18:11:49,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-28 18:11:49,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-28 18:11:49,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-28 18:11:49,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-28 18:11:49,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-28 18:11:49,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-28 18:11:49,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-28 18:11:49,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-28 18:11:49,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-28 18:11:49,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-28 18:11:49,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-28 18:11:49,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-28 18:11:49,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-28 18:11:49,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-28 18:11:49,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-28 18:11:49,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-28 18:11:49,590 INFO L138 SettingsManager]: * Use SBE=true [2020-07-28 18:11:49,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-28 18:11:49,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-28 18:11:49,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-28 18:11:49,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-28 18:11:49,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-28 18:11:49,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-28 18:11:49,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-28 18:11:49,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-28 18:11:49,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-28 18:11:49,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-28 18:11:49,595 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-28 18:11:49,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-28 18:11:49,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-28 18:11:49,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-28 18:11:49,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-28 18:11:49,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-28 18:11:49,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-28 18:11:49,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-28 18:11:49,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-28 18:11:49,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-28 18:11:49,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-28 18:11:49,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-28 18:11:49,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-28 18:11:49,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-28 18:11:49,600 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 -> 956956519a5dd5945389347ef99ef2322ddc4acd [2020-07-28 18:11:49,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-28 18:11:49,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-28 18:11:49,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-28 18:11:49,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-28 18:11:49,948 INFO L275 PluginConnector]: CDTParser initialized [2020-07-28 18:11:49,949 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec11.c [2020-07-28 18:11:50,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405572c05/e00ba99612ac4957bd2cd3babfa7c0bf/FLAGb9308dd64 [2020-07-28 18:11:50,435 INFO L306 CDTParser]: Found 1 translation units. [2020-07-28 18:11:50,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec11.c [2020-07-28 18:11:50,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405572c05/e00ba99612ac4957bd2cd3babfa7c0bf/FLAGb9308dd64 [2020-07-28 18:11:50,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405572c05/e00ba99612ac4957bd2cd3babfa7c0bf [2020-07-28 18:11:50,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-28 18:11:50,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-28 18:11:50,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-28 18:11:50,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-28 18:11:50,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-28 18:11:50,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 06:11:50" (1/1) ... [2020-07-28 18:11:50,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a7f32e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:50, skipping insertion in model container [2020-07-28 18:11:50,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 06:11:50" (1/1) ... [2020-07-28 18:11:50,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-28 18:11:50,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-28 18:11:51,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 18:11:51,086 INFO L203 MainTranslator]: Completed pre-run [2020-07-28 18:11:51,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 18:11:51,121 INFO L208 MainTranslator]: Completed translation [2020-07-28 18:11:51,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51 WrapperNode [2020-07-28 18:11:51,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-28 18:11:51,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-28 18:11:51,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-28 18:11:51,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-28 18:11:51,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (1/1) ... [2020-07-28 18:11:51,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (1/1) ... [2020-07-28 18:11:51,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-28 18:11:51,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-28 18:11:51,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-28 18:11:51,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-28 18:11:51,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (1/1) ... [2020-07-28 18:11:51,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (1/1) ... [2020-07-28 18:11:51,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (1/1) ... [2020-07-28 18:11:51,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (1/1) ... [2020-07-28 18:11:51,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (1/1) ... [2020-07-28 18:11:51,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (1/1) ... [2020-07-28 18:11:51,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (1/1) ... [2020-07-28 18:11:51,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-28 18:11:51,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-28 18:11:51,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-28 18:11:51,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-28 18:11:51,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (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 [2020-07-28 18:11:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-28 18:11:51,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-28 18:11:51,608 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-28 18:11:51,608 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-28 18:11:51,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:11:51 BoogieIcfgContainer [2020-07-28 18:11:51,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-28 18:11:51,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-28 18:11:51,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-28 18:11:51,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-28 18:11:51,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.07 06:11:50" (1/3) ... [2020-07-28 18:11:51,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b095a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 06:11:51, skipping insertion in model container [2020-07-28 18:11:51,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:11:51" (2/3) ... [2020-07-28 18:11:51,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b095a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 06:11:51, skipping insertion in model container [2020-07-28 18:11:51,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:11:51" (3/3) ... [2020-07-28 18:11:51,654 INFO L109 eAbstractionObserver]: Analyzing ICFG nec11.c [2020-07-28 18:11:51,684 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-28 18:11:51,693 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-28 18:11:51,739 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-28 18:11:51,770 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-28 18:11:51,771 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-28 18:11:51,771 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-28 18:11:51,771 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-28 18:11:51,771 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-28 18:11:51,771 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-28 18:11:51,772 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-28 18:11:51,772 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-28 18:11:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-07-28 18:11:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-28 18:11:51,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:11:51,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-28 18:11:51,795 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:11:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:11:51,802 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2020-07-28 18:11:51,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 18:11:51,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75252435] [2020-07-28 18:11:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 18:11:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:11:51,958 INFO L280 TraceCheckUtils]: 0: Hoare triple {15#true} havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; {15#true} is VALID [2020-07-28 18:11:51,960 INFO L280 TraceCheckUtils]: 1: Hoare triple {15#true} assume !true; {16#false} is VALID [2020-07-28 18:11:51,960 INFO L280 TraceCheckUtils]: 2: Hoare triple {16#false} __VERIFIER_assert_#in~cond := (if 5 == main_~len~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {16#false} is VALID [2020-07-28 18:11:51,961 INFO L280 TraceCheckUtils]: 3: Hoare triple {16#false} assume 0 == __VERIFIER_assert_~cond; {16#false} is VALID [2020-07-28 18:11:51,961 INFO L280 TraceCheckUtils]: 4: Hoare triple {16#false} assume !false; {16#false} is VALID [2020-07-28 18:11:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:11:51,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75252435] [2020-07-28 18:11:51,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-28 18:11:51,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-28 18:11:51,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569999346] [2020-07-28 18:11:51,975 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-07-28 18:11:51,977 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 18:11:51,980 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-28 18:11:52,004 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 5 edges. 5 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:11:52,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-28 18:11:52,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-28 18:11:52,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-28 18:11:52,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-28 18:11:52,015 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-07-28 18:11:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:11:52,076 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-07-28 18:11:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-28 18:11:52,077 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-07-28 18:11:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 18:11:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-28 18:11:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 23 transitions. [2020-07-28 18:11:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-28 18:11:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 23 transitions. [2020-07-28 18:11:52,089 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 23 transitions. [2020-07-28 18:11:52,146 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:11:52,157 INFO L225 Difference]: With dead ends: 20 [2020-07-28 18:11:52,157 INFO L226 Difference]: Without dead ends: 8 [2020-07-28 18:11:52,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-28 18:11:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-07-28 18:11:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-07-28 18:11:52,190 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 18:11:52,190 INFO L82 GeneralOperation]: Start isEquivalent. First operand 8 states. Second operand 8 states. [2020-07-28 18:11:52,191 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2020-07-28 18:11:52,191 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2020-07-28 18:11:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:11:52,196 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-07-28 18:11:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-07-28 18:11:52,197 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:11:52,197 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:11:52,197 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2020-07-28 18:11:52,197 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2020-07-28 18:11:52,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:11:52,199 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-07-28 18:11:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-07-28 18:11:52,200 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:11:52,200 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:11:52,200 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 18:11:52,200 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 18:11:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-28 18:11:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-07-28 18:11:52,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2020-07-28 18:11:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 18:11:52,209 INFO L479 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-07-28 18:11:52,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-28 18:11:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-07-28 18:11:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-28 18:11:52,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:11:52,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-28 18:11:52,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-28 18:11:52,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:11:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:11:52,212 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2020-07-28 18:11:52,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 18:11:52,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634160348] [2020-07-28 18:11:52,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 18:11:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 18:11:52,243 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 18:11:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 18:11:52,252 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 18:11:52,271 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-28 18:11:52,271 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-28 18:11:52,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-28 18:11:52,291 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-28 18:11:52,291 WARN L170 areAnnotationChecker]: L19-2 has no Hoare annotation [2020-07-28 18:11:52,292 WARN L170 areAnnotationChecker]: L19-2 has no Hoare annotation [2020-07-28 18:11:52,292 WARN L170 areAnnotationChecker]: L19-2 has no Hoare annotation [2020-07-28 18:11:52,292 WARN L170 areAnnotationChecker]: L19-3 has no Hoare annotation [2020-07-28 18:11:52,292 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2020-07-28 18:11:52,292 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2020-07-28 18:11:52,292 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-28 18:11:52,292 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-28 18:11:52,293 WARN L170 areAnnotationChecker]: L21-2 has no Hoare annotation [2020-07-28 18:11:52,293 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-28 18:11:52,293 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-28 18:11:52,293 WARN L170 areAnnotationChecker]: L4-2 has no Hoare annotation [2020-07-28 18:11:52,293 WARN L170 areAnnotationChecker]: L29 has no Hoare annotation [2020-07-28 18:11:52,293 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-28 18:11:52,293 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-28 18:11:52,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.07 06:11:52 BoogieIcfgContainer [2020-07-28 18:11:52,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-28 18:11:52,297 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-07-28 18:11:52,297 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-07-28 18:11:52,297 INFO L275 PluginConnector]: Witness Printer initialized [2020-07-28 18:11:52,298 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:11:51" (3/4) ... [2020-07-28 18:11:52,301 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-07-28 18:11:52,346 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-07-28 18:11:52,346 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-07-28 18:11:52,349 INFO L168 Benchmark]: Toolchain (without parser) took 1490.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 960.2 MB in the beginning and 1.1 GB in the end (delta: -112.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2020-07-28 18:11:52,350 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:11:52,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.50 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-07-28 18:11:52,352 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -183.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2020-07-28 18:11:52,353 INFO L168 Benchmark]: Boogie Preprocessor took 25.73 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. [2020-07-28 18:11:52,354 INFO L168 Benchmark]: RCFGBuilder took 358.42 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: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. [2020-07-28 18:11:52,354 INFO L168 Benchmark]: TraceAbstraction took 675.26 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: 33.2 MB). Peak memory consumption was 33.2 MB. Max. memory is 11.5 GB. [2020-07-28 18:11:52,355 INFO L168 Benchmark]: Witness Printer took 49.22 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. [2020-07-28 18:11:52,360 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 260.50 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 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 107.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -183.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.73 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 358.42 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: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 675.26 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: 33.2 MB). Peak memory consumption was 33.2 MB. Max. memory is 11.5 GB. * Witness Printer took 49.22 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int a[5]; [L14] int len=0; [L15] _Bool c=__VERIFIER_nondet_bool(); [L16] int i; [L19] COND FALSE !(\read(c)) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...