./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/nec11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 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/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 0.1.24-678e011 [2019-11-19 21:15:46,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 21:15:46,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 21:15:46,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 21:15:46,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 21:15:46,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 21:15:46,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 21:15:46,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 21:15:46,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 21:15:46,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 21:15:46,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 21:15:46,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 21:15:46,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 21:15:46,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 21:15:46,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 21:15:46,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 21:15:46,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 21:15:46,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 21:15:46,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 21:15:46,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 21:15:46,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 21:15:46,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 21:15:46,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 21:15:46,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 21:15:46,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 21:15:46,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 21:15:46,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 21:15:46,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 21:15:46,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 21:15:46,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 21:15:46,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 21:15:46,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 21:15:46,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 21:15:46,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 21:15:46,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 21:15:46,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 21:15:46,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 21:15:46,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 21:15:46,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 21:15:46,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 21:15:46,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 21:15:46,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 21:15:46,857 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 21:15:46,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 21:15:46,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 21:15:46,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 21:15:46,859 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 21:15:46,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 21:15:46,860 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 21:15:46,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 21:15:46,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 21:15:46,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 21:15:46,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 21:15:46,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 21:15:46,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 21:15:46,862 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 21:15:46,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 21:15:46,862 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 21:15:46,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 21:15:46,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 21:15:46,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 21:15:46,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 21:15:46,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 21:15:46,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 21:15:46,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 21:15:46,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 21:15:46,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 21:15:46,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 21:15:46,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 21:15:46,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 21:15:46,867 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 [2019-11-19 21:15:47,166 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 21:15:47,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 21:15:47,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 21:15:47,185 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 21:15:47,185 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 21:15:47,186 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec11.c [2019-11-19 21:15:47,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37a9be257/0d0856d9d3204d9ea93336ed2d9a0245/FLAG04002a050 [2019-11-19 21:15:47,674 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 21:15:47,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec11.c [2019-11-19 21:15:47,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37a9be257/0d0856d9d3204d9ea93336ed2d9a0245/FLAG04002a050 [2019-11-19 21:15:48,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37a9be257/0d0856d9d3204d9ea93336ed2d9a0245 [2019-11-19 21:15:48,074 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 21:15:48,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 21:15:48,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 21:15:48,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 21:15:48,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 21:15:48,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41434439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48, skipping insertion in model container [2019-11-19 21:15:48,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,094 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 21:15:48,119 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 21:15:48,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:15:48,364 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 21:15:48,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:15:48,393 INFO L192 MainTranslator]: Completed translation [2019-11-19 21:15:48,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48 WrapperNode [2019-11-19 21:15:48,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 21:15:48,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 21:15:48,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 21:15:48,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 21:15:48,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 21:15:48,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 21:15:48,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 21:15:48,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 21:15:48,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (1/1) ... [2019-11-19 21:15:48,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 21:15:48,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 21:15:48,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 21:15:48,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 21:15:48,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (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 [2019-11-19 21:15:48,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 21:15:48,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 21:15:48,729 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 21:15:48,729 INFO L285 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-19 21:15:48,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:15:48 BoogieIcfgContainer [2019-11-19 21:15:48,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 21:15:48,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 21:15:48,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 21:15:48,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 21:15:48,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:15:48" (1/3) ... [2019-11-19 21:15:48,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7d364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:15:48, skipping insertion in model container [2019-11-19 21:15:48,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:15:48" (2/3) ... [2019-11-19 21:15:48,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7d364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:15:48, skipping insertion in model container [2019-11-19 21:15:48,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:15:48" (3/3) ... [2019-11-19 21:15:48,738 INFO L109 eAbstractionObserver]: Analyzing ICFG nec11.c [2019-11-19 21:15:48,747 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 21:15:48,754 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 21:15:48,764 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 21:15:48,787 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 21:15:48,787 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 21:15:48,787 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 21:15:48,788 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 21:15:48,788 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 21:15:48,788 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 21:15:48,788 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 21:15:48,788 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 21:15:48,803 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-19 21:15:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-19 21:15:48,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:15:48,810 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-19 21:15:48,810 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:15:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:15:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2019-11-19 21:15:48,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:15:48,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036886627] [2019-11-19 21:15:48,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:15:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:15:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:15:48,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036886627] [2019-11-19 21:15:48,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:15:48,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 21:15:48,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405825986] [2019-11-19 21:15:48,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 21:15:48,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:15:48,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 21:15:48,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 21:15:48,955 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-19 21:15:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:15:48,975 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-11-19 21:15:48,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 21:15:48,977 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-19 21:15:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:15:48,986 INFO L225 Difference]: With dead ends: 20 [2019-11-19 21:15:48,987 INFO L226 Difference]: Without dead ends: 8 [2019-11-19 21:15:48,990 INFO L630 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 [2019-11-19 21:15:49,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-19 21:15:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-19 21:15:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-19 21:15:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-19 21:15:49,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-19 21:15:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:15:49,023 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-19 21:15:49,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 21:15:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-19 21:15:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-19 21:15:49,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:15:49,024 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-19 21:15:49,025 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:15:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:15:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2019-11-19 21:15:49,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:15:49,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845932725] [2019-11-19 21:15:49,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:15:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 21:15:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 21:15:49,080 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 21:15:49,080 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 21:15:49,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 09:15:49 BoogieIcfgContainer [2019-11-19 21:15:49,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 21:15:49,096 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 21:15:49,096 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 21:15:49,096 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 21:15:49,097 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:15:48" (3/4) ... [2019-11-19 21:15:49,099 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 21:15:49,134 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 21:15:49,134 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 21:15:49,137 INFO L168 Benchmark]: Toolchain (without parser) took 1059.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -132.0 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. [2019-11-19 21:15:49,137 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:15:49,138 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.83 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 21:15:49,139 INFO L168 Benchmark]: Boogie Procedure Inliner took 90.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -188.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-19 21:15:49,140 INFO L168 Benchmark]: Boogie Preprocessor took 16.27 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. [2019-11-19 21:15:49,141 INFO L168 Benchmark]: RCFGBuilder took 228.02 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2019-11-19 21:15:49,142 INFO L168 Benchmark]: TraceAbstraction took 364.37 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: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. [2019-11-19 21:15:49,143 INFO L168 Benchmark]: Witness Printer took 38.06 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-19 21:15:49,148 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 316.83 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 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 90.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -188.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.27 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. * RCFGBuilder took 228.02 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 364.37 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: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. * Witness Printer took 38.06 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: 6.5 MB). Peak memory consumption was 6.5 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. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...