./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn1f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ifeqn1f.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2625b986cac66fb3a009b48427217d3081ac93ac ..................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 22:12:22,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:12:22,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:12:22,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:12:22,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:12:22,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:12:22,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:12:22,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:12:22,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:12:22,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:12:22,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:12:22,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:12:22,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:12:22,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:12:22,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:12:22,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:12:22,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:12:22,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:12:22,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:12:22,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:12:22,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:12:22,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:12:22,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:12:22,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:12:22,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:12:22,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:12:22,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:12:22,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:12:22,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:12:22,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:12:22,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:12:22,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:12:22,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:12:22,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:12:22,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:12:22,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:12:22,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:12:22,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:12:22,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:12:22,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:12:22,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:12:22,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:12:22,869 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:12:22,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:12:22,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:12:22,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:12:22,872 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:12:22,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:12:22,873 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:12:22,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:12:22,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:12:22,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:12:22,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:12:22,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:12:22,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:12:22,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:12:22,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:12:22,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:12:22,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:12:22,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:12:22,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:12:22,878 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:12:22,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:12:22,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:12:22,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:12:22,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:12:22,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:12:22,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:12:22,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:12:22,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:12:22,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:12:22,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2625b986cac66fb3a009b48427217d3081ac93ac [2020-10-19 22:12:23,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:12:23,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:12:23,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:12:23,125 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:12:23,126 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:12:23,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn1f.c [2020-10-19 22:12:23,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f0bfbc07/b4a9697254244eb59f5f571391d65d6b/FLAGc3acb7d19 [2020-10-19 22:12:23,770 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:12:23,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn1f.c [2020-10-19 22:12:23,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f0bfbc07/b4a9697254244eb59f5f571391d65d6b/FLAGc3acb7d19 [2020-10-19 22:12:24,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f0bfbc07/b4a9697254244eb59f5f571391d65d6b [2020-10-19 22:12:24,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:12:24,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:12:24,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:12:24,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:12:24,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:12:24,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dd0323e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24, skipping insertion in model container [2020-10-19 22:12:24,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:12:24,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:12:24,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:12:24,446 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:12:24,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:12:24,483 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:12:24,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24 WrapperNode [2020-10-19 22:12:24,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:12:24,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:12:24,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:12:24,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:12:24,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:12:24,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:12:24,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:12:24,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:12:24,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (1/1) ... [2020-10-19 22:12:24,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:12:24,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:12:24,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:12:24,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:12:24,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:12:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:12:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:12:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:12:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:12:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:12:24,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:12:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:12:24,886 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:12:24,887 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-19 22:12:24,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:12:24 BoogieIcfgContainer [2020-10-19 22:12:24,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:12:24,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:12:24,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:12:24,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:12:24,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:12:24" (1/3) ... [2020-10-19 22:12:24,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f047739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:12:24, skipping insertion in model container [2020-10-19 22:12:24,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:24" (2/3) ... [2020-10-19 22:12:24,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f047739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:12:24, skipping insertion in model container [2020-10-19 22:12:24,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:12:24" (3/3) ... [2020-10-19 22:12:24,900 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn1f.c [2020-10-19 22:12:24,916 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:12:24,927 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:12:24,945 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:12:24,976 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:12:24,976 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:12:24,976 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:12:24,977 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:12:24,977 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:12:24,977 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:12:24,978 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:12:24,978 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:12:24,997 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-19 22:12:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:12:25,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:12:25,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:12:25,017 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:12:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:12:25,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-10-19 22:12:25,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:12:25,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826425907] [2020-10-19 22:12:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:12:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:12:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:12:25,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826425907] [2020-10-19 22:12:25,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:12:25,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:12:25,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420671606] [2020-10-19 22:12:25,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:12:25,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:12:25,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:12:25,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:12:25,215 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-10-19 22:12:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:12:25,232 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-10-19 22:12:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:12:25,235 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-19 22:12:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:12:25,252 INFO L225 Difference]: With dead ends: 43 [2020-10-19 22:12:25,253 INFO L226 Difference]: Without dead ends: 19 [2020-10-19 22:12:25,257 INFO L677 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 [2020-10-19 22:12:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-19 22:12:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-19 22:12:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 22:12:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-10-19 22:12:25,292 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-10-19 22:12:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:12:25,292 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-19 22:12:25,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:12:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-10-19 22:12:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:12:25,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:12:25,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:12:25,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:12:25,295 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:12:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:12:25,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-10-19 22:12:25,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:12:25,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607510620] [2020-10-19 22:12:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:12:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:12:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:12:25,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607510620] [2020-10-19 22:12:25,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:12:25,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:12:25,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17723575] [2020-10-19 22:12:25,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:12:25,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:12:25,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:12:25,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:12:25,417 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-10-19 22:12:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:12:25,506 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-10-19 22:12:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:12:25,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-19 22:12:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:12:25,508 INFO L225 Difference]: With dead ends: 45 [2020-10-19 22:12:25,508 INFO L226 Difference]: Without dead ends: 31 [2020-10-19 22:12:25,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:12:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-19 22:12:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-19 22:12:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 22:12:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-19 22:12:25,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-10-19 22:12:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:12:25,521 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-19 22:12:25,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:12:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-19 22:12:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:12:25,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:12:25,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:12:25,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:12:25,524 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:12:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:12:25,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-10-19 22:12:25,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:12:25,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280941447] [2020-10-19 22:12:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:12:25,565 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:12:25,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234358047] [2020-10-19 22:12:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:12:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:12:25,648 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:12:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:12:25,666 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:12:25,700 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:12:25,700 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:12:25,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 22:12:25,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:12:25 BoogieIcfgContainer [2020-10-19 22:12:25,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:12:25,957 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:12:25,957 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:12:25,957 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:12:25,958 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:12:24" (3/4) ... [2020-10-19 22:12:25,960 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:12:26,023 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:12:26,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:12:26,026 INFO L168 Benchmark]: Toolchain (without parser) took 1876.27 ms. Allocated memory was 41.9 MB in the beginning and 47.2 MB in the end (delta: 5.2 MB). Free memory was 20.0 MB in the beginning and 16.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:26,027 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 31.5 MB. Free memory was 7.8 MB in the beginning and 7.8 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. [2020-10-19 22:12:26,028 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.02 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 19.2 MB in the beginning and 18.6 MB in the end (delta: 517.9 kB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:26,029 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.77 ms. Allocated memory is still 42.5 MB. Free memory was 18.6 MB in the beginning and 16.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:26,029 INFO L168 Benchmark]: Boogie Preprocessor took 29.28 ms. Allocated memory is still 42.5 MB. Free memory was 16.7 MB in the beginning and 15.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:26,030 INFO L168 Benchmark]: RCFGBuilder took 333.21 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 15.3 MB in the beginning and 15.5 MB in the end (delta: -231.1 kB). Peak memory consumption was 5.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:26,031 INFO L168 Benchmark]: TraceAbstraction took 1066.03 ms. Allocated memory was 44.0 MB in the beginning and 47.2 MB in the end (delta: 3.1 MB). Free memory was 15.1 MB in the beginning and 20.3 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:12:26,032 INFO L168 Benchmark]: Witness Printer took 66.69 ms. Allocated memory is still 47.2 MB. Free memory was 19.9 MB in the beginning and 16.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:26,037 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 31.5 MB. Free memory was 7.8 MB in the beginning and 7.8 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 326.02 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 19.2 MB in the beginning and 18.6 MB in the end (delta: 517.9 kB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 41.77 ms. Allocated memory is still 42.5 MB. Free memory was 18.6 MB in the beginning and 16.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 29.28 ms. Allocated memory is still 42.5 MB. Free memory was 16.7 MB in the beginning and 15.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 333.21 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 15.3 MB in the beginning and 15.5 MB in the end (delta: -231.1 kB). Peak memory consumption was 5.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1066.03 ms. Allocated memory was 44.0 MB in the beginning and 47.2 MB in the end (delta: 3.1 MB). Free memory was 15.1 MB in the beginning and 20.3 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 66.69 ms. Allocated memory is still 47.2 MB. Free memory was 19.9 MB in the beginning and 16.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i