./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 30f4e4ab 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 0.1.24-30f4e4a [2019-11-27 23:59:34,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:59:34,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:59:34,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:59:34,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:59:34,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:59:34,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:59:34,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:59:34,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:59:34,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:59:34,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:59:34,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:59:34,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:59:34,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:59:34,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:59:34,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:59:34,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:59:34,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:59:34,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:59:34,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:59:34,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:59:34,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:59:34,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:59:34,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:59:34,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:59:34,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:59:34,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:59:34,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:59:34,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:59:34,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:59:34,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:59:34,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:59:34,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:59:34,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:59:34,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:59:34,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:59:34,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:59:34,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:59:34,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:59:34,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:59:34,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:59:34,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:59:34,822 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:59:34,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:59:34,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:59:34,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:59:34,824 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:59:34,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:59:34,825 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:59:34,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:59:34,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:59:34,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:59:34,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:59:34,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:59:34,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:59:34,827 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:59:34,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:59:34,828 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:59:34,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:59:34,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:59:34,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:59:34,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:59:34,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:59:34,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:59:34,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:59:34,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:59:34,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:59:34,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:59:34,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:59:34,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:59:34,831 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 [2019-11-27 23:59:35,119 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:59:35,139 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:59:35,143 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:59:35,144 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:59:35,144 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:59:35,145 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec20.c [2019-11-27 23:59:35,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a06a0543/fadf9b66b97249b48afcfc2b9eaa184a/FLAG94cd6f759 [2019-11-27 23:59:35,687 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:59:35,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec20.c [2019-11-27 23:59:35,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a06a0543/fadf9b66b97249b48afcfc2b9eaa184a/FLAG94cd6f759 [2019-11-27 23:59:36,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a06a0543/fadf9b66b97249b48afcfc2b9eaa184a [2019-11-27 23:59:36,043 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:59:36,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:59:36,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:59:36,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:59:36,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:59:36,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f6559d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36, skipping insertion in model container [2019-11-27 23:59:36,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:59:36,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:59:36,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:59:36,292 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:59:36,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:59:36,360 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:59:36,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36 WrapperNode [2019-11-27 23:59:36,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:59:36,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:59:36,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:59:36,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:59:36,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:59:36,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:59:36,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:59:36,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:59:36,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (1/1) ... [2019-11-27 23:59:36,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:59:36,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:59:36,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:59:36,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:59:36,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (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 [2019-11-27 23:59:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:59:36,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:59:36,930 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:59:36,931 INFO L297 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-27 23:59:36,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:59:36 BoogieIcfgContainer [2019-11-27 23:59:36,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:59:36,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:59:36,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:59:36,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:59:36,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:59:36" (1/3) ... [2019-11-27 23:59:36,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450193cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:59:36, skipping insertion in model container [2019-11-27 23:59:36,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:36" (2/3) ... [2019-11-27 23:59:36,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450193cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:59:36, skipping insertion in model container [2019-11-27 23:59:36,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:59:36" (3/3) ... [2019-11-27 23:59:36,943 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2019-11-27 23:59:36,961 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:59:36,978 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:59:37,001 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:59:37,022 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:59:37,023 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:59:37,023 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:59:37,023 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:59:37,023 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:59:37,023 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:59:37,024 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:59:37,024 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:59:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-27 23:59:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 23:59:37,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:37,042 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:37,043 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash -592064849, now seen corresponding path program 1 times [2019-11-27 23:59:37,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:37,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620242194] [2019-11-27 23:59:37,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:37,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620242194] [2019-11-27 23:59:37,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:59:37,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 23:59:37,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272966571] [2019-11-27 23:59:37,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 23:59:37,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:37,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 23:59:37,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:59:37,349 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-11-27 23:59:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:37,433 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2019-11-27 23:59:37,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 23:59:37,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-27 23:59:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:37,445 INFO L225 Difference]: With dead ends: 43 [2019-11-27 23:59:37,445 INFO L226 Difference]: Without dead ends: 18 [2019-11-27 23:59:37,449 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 [2019-11-27 23:59:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-27 23:59:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-27 23:59:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-27 23:59:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-27 23:59:37,478 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2019-11-27 23:59:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:37,479 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-27 23:59:37,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 23:59:37,479 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-27 23:59:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 23:59:37,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:37,480 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:37,481 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1182942513, now seen corresponding path program 1 times [2019-11-27 23:59:37,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:37,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965927434] [2019-11-27 23:59:37,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:37,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965927434] [2019-11-27 23:59:37,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:59:37,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 23:59:37,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344157090] [2019-11-27 23:59:37,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 23:59:37,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:37,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 23:59:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:59:37,622 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2019-11-27 23:59:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:37,798 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-11-27 23:59:37,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 23:59:37,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-27 23:59:37,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:37,800 INFO L225 Difference]: With dead ends: 23 [2019-11-27 23:59:37,800 INFO L226 Difference]: Without dead ends: 19 [2019-11-27 23:59:37,802 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 [2019-11-27 23:59:37,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-27 23:59:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 11. [2019-11-27 23:59:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-27 23:59:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-27 23:59:37,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2019-11-27 23:59:37,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:37,806 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-27 23:59:37,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 23:59:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-27 23:59:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-27 23:59:37,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:37,807 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:37,808 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:37,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1172475752, now seen corresponding path program 1 times [2019-11-27 23:59:37,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:37,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761713808] [2019-11-27 23:59:37,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:59:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:59:37,890 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:59:37,890 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:59:37,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:59:37 BoogieIcfgContainer [2019-11-27 23:59:37,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:59:37,912 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:59:37,912 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:59:37,912 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:59:37,913 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:59:36" (3/4) ... [2019-11-27 23:59:37,914 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:59:37,960 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:59:37,960 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:59:37,963 INFO L168 Benchmark]: Toolchain (without parser) took 1918.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 959.0 MB in the beginning and 1.1 GB in the end (delta: -128.3 MB). Peak memory consumption was 35.3 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:37,964 INFO L168 Benchmark]: CDTParser took 0.25 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. [2019-11-27 23:59:37,965 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.32 ms. Allocated memory is still 1.0 GB. Free memory was 959.0 MB in the beginning and 948.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:37,966 INFO L168 Benchmark]: Boogie Procedure Inliner took 153.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 948.3 MB in the beginning and 1.2 GB in the end (delta: -211.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:37,966 INFO L168 Benchmark]: Boogie Preprocessor took 24.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:59:37,967 INFO L168 Benchmark]: RCFGBuilder took 392.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:37,968 INFO L168 Benchmark]: TraceAbstraction took 978.15 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: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:37,969 INFO L168 Benchmark]: Witness Printer took 48.88 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:37,977 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 316.32 ms. Allocated memory is still 1.0 GB. Free memory was 959.0 MB in the beginning and 948.3 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 153.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 948.3 MB in the beginning and 1.2 GB in the end (delta: -211.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 392.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 978.15 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: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 11.5 GB. * Witness Printer took 48.88 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: 6.7 MB). Peak memory consumption was 6.7 MB. 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: 0.8s, 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, 0.1s 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...