./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/ludcmp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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_1.5.800.v20200727-1323.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/ludcmp.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 f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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_1.5.800.v20200727-1323.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/ludcmp.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 10:31:16,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 10:31:16,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 10:31:16,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 10:31:16,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 10:31:16,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 10:31:16,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 10:31:16,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 10:31:16,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 10:31:16,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 10:31:16,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 10:31:16,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 10:31:16,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 10:31:16,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 10:31:16,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 10:31:16,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 10:31:16,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 10:31:16,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 10:31:16,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 10:31:16,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 10:31:16,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 10:31:16,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 10:31:16,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 10:31:16,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 10:31:16,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 10:31:16,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 10:31:16,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 10:31:16,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 10:31:16,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 10:31:16,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 10:31:16,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 10:31:16,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 10:31:16,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 10:31:16,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 10:31:16,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 10:31:16,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 10:31:16,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 10:31:16,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 10:31:16,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 10:31:16,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 10:31:16,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 10:31:17,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 10:31:17,042 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 10:31:17,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 10:31:17,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 10:31:17,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 10:31:17,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 10:31:17,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 10:31:17,046 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 10:31:17,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 10:31:17,047 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 10:31:17,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 10:31:17,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 10:31:17,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 10:31:17,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 10:31:17,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 10:31:17,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 10:31:17,048 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 10:31:17,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 10:31:17,049 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 10:31:17,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 10:31:17,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 10:31:17,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 10:31:17,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 10:31:17,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:31:17,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 10:31:17,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 10:31:17,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 10:31:17,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 10:31:17,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 10:31:17,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 10:31:17,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 10:31:17,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 [2021-08-29 10:31:17,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 10:31:17,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 10:31:17,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 10:31:17,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 10:31:17,433 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 10:31:17,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/ludcmp.c [2021-08-29 10:31:17,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66fd8c677/71cbfb3a593b48be941e8b4c45aa58bc/FLAG630277af9 [2021-08-29 10:31:17,941 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 10:31:17,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c [2021-08-29 10:31:17,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66fd8c677/71cbfb3a593b48be941e8b4c45aa58bc/FLAG630277af9 [2021-08-29 10:31:18,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66fd8c677/71cbfb3a593b48be941e8b4c45aa58bc [2021-08-29 10:31:18,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 10:31:18,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 10:31:18,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 10:31:18,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 10:31:18,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 10:31:18,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2c51a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18, skipping insertion in model container [2021-08-29 10:31:18,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 10:31:18,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 10:31:18,470 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c[318,331] [2021-08-29 10:31:18,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:31:18,509 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 10:31:18,518 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c[318,331] [2021-08-29 10:31:18,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:31:18,547 INFO L208 MainTranslator]: Completed translation [2021-08-29 10:31:18,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18 WrapperNode [2021-08-29 10:31:18,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 10:31:18,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 10:31:18,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 10:31:18,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 10:31:18,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 10:31:18,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 10:31:18,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 10:31:18,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 10:31:18,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 10:31:18,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 10:31:18,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 10:31:18,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 10:31:18,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (1/1) ... [2021-08-29 10:31:18,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:31:18,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:31:18,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 10:31:18,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 10:31:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 10:31:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 10:31:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-08-29 10:31:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-08-29 10:31:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 10:31:18,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 10:31:18,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 10:31:18,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 10:31:18,968 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-08-29 10:31:18,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:31:18 BoogieIcfgContainer [2021-08-29 10:31:18,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 10:31:18,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 10:31:18,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 10:31:18,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 10:31:18,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:31:18" (1/3) ... [2021-08-29 10:31:18,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec93c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:31:18, skipping insertion in model container [2021-08-29 10:31:18,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:18" (2/3) ... [2021-08-29 10:31:18,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec93c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:31:18, skipping insertion in model container [2021-08-29 10:31:18,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:31:18" (3/3) ... [2021-08-29 10:31:18,975 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2021-08-29 10:31:18,979 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 10:31:18,979 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 10:31:19,029 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 10:31:19,034 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 10:31:19,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 10:31:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 10:31:19,051 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:31:19,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:31:19,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:31:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:31:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2021-08-29 10:31:19,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:31:19,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681009042] [2021-08-29 10:31:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:31:19,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:31:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:31:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:19,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:31:19,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681009042] [2021-08-29 10:31:19,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681009042] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:31:19,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:31:19,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 10:31:19,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875993881] [2021-08-29 10:31:19,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 10:31:19,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:31:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 10:31:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 10:31:19,332 INFO L87 Difference]: Start difference. First operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:19,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:31:19,549 INFO L93 Difference]: Finished difference Result 102 states and 159 transitions. [2021-08-29 10:31:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 10:31:19,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-29 10:31:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:31:19,557 INFO L225 Difference]: With dead ends: 102 [2021-08-29 10:31:19,557 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 10:31:19,559 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.51ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 10:31:19,562 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.48ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 176.79ms IncrementalHoareTripleChecker+Time [2021-08-29 10:31:19,563 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 2.48ms Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 176.79ms Time] [2021-08-29 10:31:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 10:31:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2021-08-29 10:31:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-29 10:31:19,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2021-08-29 10:31:19,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:31:19,588 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-29 10:31:19,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-29 10:31:19,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 10:31:19,588 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:31:19,589 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:31:19,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 10:31:19,589 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:31:19,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:31:19,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1948892579, now seen corresponding path program 1 times [2021-08-29 10:31:19,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:31:19,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941947183] [2021-08-29 10:31:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:31:19,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:31:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:31:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:19,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:31:19,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941947183] [2021-08-29 10:31:19,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941947183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:31:19,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386403303] [2021-08-29 10:31:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:31:19,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:31:19,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:31:19,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:31:19,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 10:31:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:31:19,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 10:31:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:31:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:19,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:31:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:19,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386403303] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:31:19,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:31:19,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-08-29 10:31:19,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937410952] [2021-08-29 10:31:19,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 10:31:19,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:31:19,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 10:31:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-08-29 10:31:19,932 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:31:20,042 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-08-29 10:31:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 10:31:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 10:31:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:31:20,043 INFO L225 Difference]: With dead ends: 38 [2021-08-29 10:31:20,043 INFO L226 Difference]: Without dead ends: 26 [2021-08-29 10:31:20,044 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 53.34ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-29 10:31:20,045 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.65ms IncrementalHoareTripleChecker+Time [2021-08-29 10:31:20,045 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 85.65ms Time] [2021-08-29 10:31:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-29 10:31:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-29 10:31:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-08-29 10:31:20,050 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2021-08-29 10:31:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:31:20,050 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-08-29 10:31:20,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-08-29 10:31:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 10:31:20,051 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:31:20,051 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:31:20,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 10:31:20,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:31:20,285 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:31:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:31:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash -439332020, now seen corresponding path program 2 times [2021-08-29 10:31:20,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:31:20,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615719825] [2021-08-29 10:31:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:31:20,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:31:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:31:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-29 10:31:20,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:31:20,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615719825] [2021-08-29 10:31:20,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615719825] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:31:20,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:31:20,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 10:31:20,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215657130] [2021-08-29 10:31:20,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 10:31:20,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:31:20,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 10:31:20,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 10:31:20,374 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:31:20,431 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2021-08-29 10:31:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 10:31:20,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-29 10:31:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:31:20,432 INFO L225 Difference]: With dead ends: 78 [2021-08-29 10:31:20,432 INFO L226 Difference]: Without dead ends: 54 [2021-08-29 10:31:20,433 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.29ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 10:31:20,434 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.59ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.80ms IncrementalHoareTripleChecker+Time [2021-08-29 10:31:20,434 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.59ms Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 32.80ms Time] [2021-08-29 10:31:20,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-29 10:31:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-08-29 10:31:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-08-29 10:31:20,441 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 23 [2021-08-29 10:31:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:31:20,441 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-08-29 10:31:20,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-08-29 10:31:20,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 10:31:20,442 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:31:20,442 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:31:20,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 10:31:20,443 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:31:20,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:31:20,443 INFO L82 PathProgramCache]: Analyzing trace with hash 756876242, now seen corresponding path program 1 times [2021-08-29 10:31:20,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:31:20,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122987228] [2021-08-29 10:31:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:31:20,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:31:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:31:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:20,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:31:20,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122987228] [2021-08-29 10:31:20,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122987228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:31:20,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120143480] [2021-08-29 10:31:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:31:20,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:31:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:31:20,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:31:20,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 10:31:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:31:20,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 10:31:20,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:31:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:20,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:31:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:20,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120143480] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:31:20,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:31:20,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-08-29 10:31:20,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112978339] [2021-08-29 10:31:20,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 10:31:20,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:31:20,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 10:31:20,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-08-29 10:31:20,921 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:31:21,034 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2021-08-29 10:31:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 10:31:21,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-29 10:31:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:31:21,035 INFO L225 Difference]: With dead ends: 96 [2021-08-29 10:31:21,035 INFO L226 Difference]: Without dead ends: 57 [2021-08-29 10:31:21,036 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 94.24ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-08-29 10:31:21,037 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.02ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.86ms IncrementalHoareTripleChecker+Time [2021-08-29 10:31:21,037 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 4.02ms Time], IncrementalHoareTripleChecker [17 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 69.86ms Time] [2021-08-29 10:31:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-29 10:31:21,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-29 10:31:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-08-29 10:31:21,045 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 23 [2021-08-29 10:31:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:31:21,045 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-08-29 10:31:21,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:21,046 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-08-29 10:31:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-29 10:31:21,047 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:31:21,047 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:31:21,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 10:31:21,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-29 10:31:21,269 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:31:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:31:21,270 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 2 times [2021-08-29 10:31:21,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:31:21,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446911896] [2021-08-29 10:31:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:31:21,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:31:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 10:31:21,293 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 10:31:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 10:31:21,332 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 10:31:21,332 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 10:31:21,333 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 10:31:21,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-29 10:31:21,339 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 10:31:21,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 10:31:21 BoogieIcfgContainer [2021-08-29 10:31:21,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 10:31:21,374 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 10:31:21,374 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 10:31:21,374 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 10:31:21,374 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:31:18" (3/4) ... [2021-08-29 10:31:21,377 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-29 10:31:21,377 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 10:31:21,377 INFO L158 Benchmark]: Toolchain (without parser) took 3023.10ms. Allocated memory was 56.6MB in the beginning and 83.9MB in the end (delta: 27.3MB). Free memory was 35.7MB in the beginning and 38.0MB in the end (delta: -2.3MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2021-08-29 10:31:21,378 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 38.8MB in the end (delta: 50.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:31:21,378 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.24ms. Allocated memory is still 56.6MB. Free memory was 35.4MB in the beginning and 23.7MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 10:31:21,378 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.28ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 23.7MB in the beginning and 51.7MB in the end (delta: -28.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 10:31:21,378 INFO L158 Benchmark]: Boogie Preprocessor took 44.99ms. Allocated memory is still 69.2MB. Free memory was 51.7MB in the beginning and 49.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:31:21,379 INFO L158 Benchmark]: RCFGBuilder took 290.67ms. Allocated memory is still 69.2MB. Free memory was 49.7MB in the beginning and 36.8MB in the end (delta: 12.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-29 10:31:21,379 INFO L158 Benchmark]: TraceAbstraction took 2402.17ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 36.2MB in the beginning and 38.5MB in the end (delta: -2.3MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2021-08-29 10:31:21,379 INFO L158 Benchmark]: Witness Printer took 3.26ms. Allocated memory is still 83.9MB. Free memory was 38.5MB in the beginning and 38.0MB in the end (delta: 534.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:31:21,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 38.8MB in the end (delta: 50.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.24ms. Allocated memory is still 56.6MB. Free memory was 35.4MB in the beginning and 23.7MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 84.28ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 23.7MB in the beginning and 51.7MB in the end (delta: -28.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.99ms. Allocated memory is still 69.2MB. Free memory was 51.7MB in the beginning and 49.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 290.67ms. Allocated memory is still 69.2MB. Free memory was 49.7MB in the beginning and 36.8MB in the end (delta: 12.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 2402.17ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 36.2MB in the beginning and 38.5MB in the end (delta: -2.3MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. * Witness Printer took 3.26ms. Allocated memory is still 83.9MB. Free memory was 38.5MB in the beginning and 38.0MB in the end (delta: 534.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 100. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [a={7:0}, b={5:0}, x={6:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={7:0}, b={5:0}, x={6:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={5:0}, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={5:0}, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={5:0}, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={5:0}, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={5:0}, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND FALSE !(j <= n) VAL [a={7:0}, b={5:0}, x={6:0}] [L6] COND TRUE !(cond) VAL [a={7:0}, b={5:0}, x={6:0}] [L7] reach_error() VAL [a={7:0}, b={5:0}, x={6:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2310.77ms, OverallIterations: 5, TraceHistogramMax: 6, EmptinessCheckTime: 10.32ms, AutomataDifference: 557.26ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 8.35ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 175 SdHoareTripleChecker+Valid, 365.10ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 175 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 295.92ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 127 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 326 IncrementalHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 0 mSDtfsCounter, 326 mSolverCounterSat, 8.16ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 172.37ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=4, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 29.29ms AutomataMinimizationTime, 4 MinimizatonAttempts, 16 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.55ms SsaConstructionTime, 146.23ms SatisfiabilityAnalysisTime, 796.93ms InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 476 SizeOfPredicates, 4 NumberOfNonLiveVariables, 183 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 28/115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-29 10:31:21,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 10:31:23,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 10:31:23,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 10:31:23,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 10:31:23,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 10:31:23,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 10:31:23,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 10:31:23,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 10:31:23,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 10:31:23,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 10:31:23,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 10:31:23,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 10:31:23,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 10:31:23,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 10:31:23,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 10:31:23,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 10:31:23,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 10:31:23,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 10:31:23,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 10:31:23,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 10:31:23,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 10:31:23,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 10:31:23,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 10:31:23,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 10:31:23,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 10:31:23,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 10:31:23,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 10:31:23,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 10:31:23,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 10:31:23,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 10:31:23,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 10:31:23,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 10:31:23,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 10:31:23,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 10:31:23,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 10:31:23,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 10:31:23,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 10:31:23,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 10:31:23,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 10:31:23,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 10:31:23,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 10:31:23,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-29 10:31:23,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 10:31:23,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 10:31:23,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 10:31:23,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 10:31:23,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 10:31:23,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 10:31:23,370 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 10:31:23,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 10:31:23,370 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 10:31:23,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 10:31:23,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 10:31:23,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 10:31:23,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 10:31:23,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 10:31:23,372 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-29 10:31:23,372 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-29 10:31:23,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 10:31:23,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 10:31:23,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 10:31:23,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 10:31:23,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 10:31:23,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 10:31:23,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 10:31:23,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:31:23,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 10:31:23,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 10:31:23,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 10:31:23,382 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-29 10:31:23,382 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-29 10:31:23,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 10:31:23,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 10:31:23,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-29 10:31:23,383 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 [2021-08-29 10:31:23,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 10:31:23,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 10:31:23,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 10:31:23,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 10:31:23,731 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 10:31:23,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/ludcmp.c [2021-08-29 10:31:23,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58b7d48f9/35169e53f6744caf89339e479e336e9c/FLAGf45dcbaaf [2021-08-29 10:31:24,246 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 10:31:24,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c [2021-08-29 10:31:24,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58b7d48f9/35169e53f6744caf89339e479e336e9c/FLAGf45dcbaaf [2021-08-29 10:31:24,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58b7d48f9/35169e53f6744caf89339e479e336e9c [2021-08-29 10:31:24,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 10:31:24,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 10:31:24,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 10:31:24,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 10:31:24,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 10:31:24,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d27a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24, skipping insertion in model container [2021-08-29 10:31:24,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 10:31:24,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 10:31:24,790 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c[318,331] [2021-08-29 10:31:24,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:31:24,836 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 10:31:24,846 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c[318,331] [2021-08-29 10:31:24,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:31:24,882 INFO L208 MainTranslator]: Completed translation [2021-08-29 10:31:24,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24 WrapperNode [2021-08-29 10:31:24,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 10:31:24,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 10:31:24,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 10:31:24,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 10:31:24,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 10:31:24,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 10:31:24,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 10:31:24,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 10:31:24,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 10:31:24,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 10:31:24,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 10:31:24,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 10:31:24,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (1/1) ... [2021-08-29 10:31:24,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:31:24,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:31:25,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 10:31:25,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 10:31:25,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-08-29 10:31:25,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-08-29 10:31:25,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-29 10:31:25,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 10:31:25,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 10:31:25,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 10:31:25,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 10:31:25,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 10:31:25,484 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-08-29 10:31:25,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:31:25 BoogieIcfgContainer [2021-08-29 10:31:25,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 10:31:25,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 10:31:25,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 10:31:25,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 10:31:25,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:31:24" (1/3) ... [2021-08-29 10:31:25,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3556ea06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:31:25, skipping insertion in model container [2021-08-29 10:31:25,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:31:24" (2/3) ... [2021-08-29 10:31:25,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3556ea06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:31:25, skipping insertion in model container [2021-08-29 10:31:25,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:31:25" (3/3) ... [2021-08-29 10:31:25,499 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2021-08-29 10:31:25,505 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 10:31:25,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 10:31:25,561 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 10:31:25,568 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 10:31:25,569 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 10:31:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 10:31:25,598 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:31:25,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:31:25,599 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:31:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:31:25,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2021-08-29 10:31:25,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 10:31:25,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578597775] [2021-08-29 10:31:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:31:25,613 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 10:31:25,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 10:31:25,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 10:31:25,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-29 10:31:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:31:25,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 10:31:25,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:31:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:25,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:31:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:25,902 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 10:31:25,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578597775] [2021-08-29 10:31:25,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578597775] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 10:31:25,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:31:25,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-08-29 10:31:25,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882372815] [2021-08-29 10:31:25,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 10:31:25,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 10:31:25,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 10:31:25,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-29 10:31:25,958 INFO L87 Difference]: Start difference. First operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:29,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 10:31:31,681 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 10:31:34,423 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 10:31:37,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 10:31:40,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 10:31:42,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 10:31:44,736 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 10:31:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:31:45,522 INFO L93 Difference]: Finished difference Result 128 states and 203 transitions. [2021-08-29 10:31:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 10:31:45,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-29 10:31:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:31:45,538 INFO L225 Difference]: With dead ends: 128 [2021-08-29 10:31:45,539 INFO L226 Difference]: Without dead ends: 18 [2021-08-29 10:31:45,541 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.87ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-08-29 10:31:45,555 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18546.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.03ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19481.60ms IncrementalHoareTripleChecker+Time [2021-08-29 10:31:45,556 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 259 Unknown, 0 Unchecked, 7.03ms Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 7 Unknown, 0 Unchecked, 19481.60ms Time] [2021-08-29 10:31:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-29 10:31:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-29 10:31:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-08-29 10:31:45,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2021-08-29 10:31:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:31:45,590 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-08-29 10:31:45,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:45,590 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-08-29 10:31:45,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 10:31:45,591 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:31:45,591 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:31:45,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-29 10:31:45,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 10:31:45,801 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:31:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:31:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash 116728450, now seen corresponding path program 1 times [2021-08-29 10:31:45,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 10:31:45,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623344864] [2021-08-29 10:31:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:31:45,803 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 10:31:45,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 10:31:45,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 10:31:45,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-29 10:31:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:31:46,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 10:31:46,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:31:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:46,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:31:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:46,970 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 10:31:46,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623344864] [2021-08-29 10:31:46,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623344864] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:31:46,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 10:31:46,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-29 10:31:46,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757508660] [2021-08-29 10:31:46,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 10:31:46,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 10:31:46,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 10:31:46,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-29 10:31:46,973 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:31:50,124 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2021-08-29 10:31:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 10:31:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-29 10:31:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:31:50,128 INFO L225 Difference]: With dead ends: 94 [2021-08-29 10:31:50,128 INFO L226 Difference]: Without dead ends: 78 [2021-08-29 10:31:50,128 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 500.85ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-29 10:31:50,129 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2731.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.72ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2956.22ms IncrementalHoareTripleChecker+Time [2021-08-29 10:31:50,130 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 129 Unknown, 0 Unchecked, 4.72ms Time], IncrementalHoareTripleChecker [17 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 2956.22ms Time] [2021-08-29 10:31:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-29 10:31:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-08-29 10:31:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-08-29 10:31:50,140 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2021-08-29 10:31:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:31:50,141 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-08-29 10:31:50,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-08-29 10:31:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 10:31:50,142 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:31:50,142 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:31:50,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-29 10:31:50,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 10:31:50,362 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:31:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:31:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2021-08-29 10:31:50,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 10:31:50,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894378560] [2021-08-29 10:31:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:31:50,363 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 10:31:50,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 10:31:50,364 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 10:31:50,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-29 10:31:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:31:50,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 10:31:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:31:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:51,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:31:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:31:51,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 10:31:51,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894378560] [2021-08-29 10:31:51,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894378560] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:31:51,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 10:31:51,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-29 10:31:51,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001997102] [2021-08-29 10:31:51,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 10:31:51,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 10:31:51,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 10:31:51,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-29 10:31:51,579 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:31:55,176 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2021-08-29 10:31:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 10:31:55,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-29 10:31:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:31:55,190 INFO L225 Difference]: With dead ends: 121 [2021-08-29 10:31:55,190 INFO L226 Difference]: Without dead ends: 98 [2021-08-29 10:31:55,191 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 813.11ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-29 10:31:55,191 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3029.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3248.25ms IncrementalHoareTripleChecker+Time [2021-08-29 10:31:55,192 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 111 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 3248.25ms Time] [2021-08-29 10:31:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-29 10:31:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-08-29 10:31:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2021-08-29 10:31:55,216 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 15 [2021-08-29 10:31:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:31:55,216 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2021-08-29 10:31:55,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:31:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2021-08-29 10:31:55,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-29 10:31:55,218 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:31:55,218 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:31:55,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-29 10:31:55,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 10:31:55,421 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:31:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:31:55,422 INFO L82 PathProgramCache]: Analyzing trace with hash -642360546, now seen corresponding path program 2 times [2021-08-29 10:31:55,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 10:31:55,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992410695] [2021-08-29 10:31:55,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 10:31:55,423 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 10:31:55,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 10:31:55,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 10:31:55,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-29 10:31:56,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 10:31:56,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:31:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 10:31:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:31:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-29 10:31:57,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:31:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-29 10:31:57,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 10:31:57,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992410695] [2021-08-29 10:31:57,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992410695] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:31:57,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 10:31:57,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-29 10:31:57,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608877292] [2021-08-29 10:31:57,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 10:31:57,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 10:31:57,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 10:31:57,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-29 10:31:57,978 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:32:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:32:09,554 INFO L93 Difference]: Finished difference Result 448 states and 518 transitions. [2021-08-29 10:32:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-29 10:32:09,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-29 10:32:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:32:09,557 INFO L225 Difference]: With dead ends: 448 [2021-08-29 10:32:09,557 INFO L226 Difference]: Without dead ends: 374 [2021-08-29 10:32:09,558 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 3670.18ms TimeCoverageRelationStatistics Valid=460, Invalid=1100, Unknown=0, NotChecked=0, Total=1560 [2021-08-29 10:32:09,559 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 329 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8073.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.16ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8667.19ms IncrementalHoareTripleChecker+Time [2021-08-29 10:32:09,560 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 0 Invalid, 506 Unknown, 0 Unchecked, 11.16ms Time], IncrementalHoareTripleChecker [94 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 8667.19ms Time] [2021-08-29 10:32:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-08-29 10:32:09,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 183. [2021-08-29 10:32:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 182 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:32:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 210 transitions. [2021-08-29 10:32:09,583 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 210 transitions. Word has length 31 [2021-08-29 10:32:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:32:09,583 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 210 transitions. [2021-08-29 10:32:09,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:32:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 210 transitions. [2021-08-29 10:32:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-29 10:32:09,584 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:32:09,584 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:32:09,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-29 10:32:09,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 10:32:09,797 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:32:09,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:32:09,798 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 3 times [2021-08-29 10:32:09,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 10:32:09,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840579493] [2021-08-29 10:32:09,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 10:32:09,798 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 10:32:09,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 10:32:09,800 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 10:32:09,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-29 10:32:10,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-29 10:32:10,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-29 10:32:10,835 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 10:32:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 10:32:11,755 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-29 10:32:11,755 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 10:32:11,756 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 10:32:11,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-29 10:32:11,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 10:32:11,962 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 10:32:12,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 10:32:12 BoogieIcfgContainer [2021-08-29 10:32:12,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 10:32:12,010 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 10:32:12,010 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 10:32:12,010 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 10:32:12,010 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:31:25" (3/4) ... [2021-08-29 10:32:12,011 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 10:32:12,093 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 10:32:12,093 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 10:32:12,094 INFO L158 Benchmark]: Toolchain (without parser) took 47444.37ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.4MB in the beginning and 36.7MB in the end (delta: -9.2MB). Peak memory consumption was 3.4MB. Max. memory is 16.1GB. [2021-08-29 10:32:12,094 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 50.3MB. Free memory was 32.3MB in the beginning and 32.3MB in the end (delta: 38.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:32:12,094 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.32ms. Allocated memory is still 50.3MB. Free memory was 27.3MB in the beginning and 25.9MB in the end (delta: 1.4MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2021-08-29 10:32:12,095 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.04ms. Allocated memory is still 50.3MB. Free memory was 25.9MB in the beginning and 23.5MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:32:12,095 INFO L158 Benchmark]: Boogie Preprocessor took 42.12ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 23.5MB in the beginning and 43.2MB in the end (delta: -19.7MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-08-29 10:32:12,095 INFO L158 Benchmark]: RCFGBuilder took 519.16ms. Allocated memory is still 60.8MB. Free memory was 43.2MB in the beginning and 41.0MB in the end (delta: 2.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-08-29 10:32:12,096 INFO L158 Benchmark]: TraceAbstraction took 46516.25ms. Allocated memory is still 60.8MB. Free memory was 40.7MB in the beginning and 40.5MB in the end (delta: 251.5kB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2021-08-29 10:32:12,096 INFO L158 Benchmark]: Witness Printer took 83.74ms. Allocated memory is still 60.8MB. Free memory was 40.5MB in the beginning and 36.7MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 10:32:12,099 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 50.3MB. Free memory was 32.3MB in the beginning and 32.3MB in the end (delta: 38.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 231.32ms. Allocated memory is still 50.3MB. Free memory was 27.3MB in the beginning and 25.9MB in the end (delta: 1.4MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.04ms. Allocated memory is still 50.3MB. Free memory was 25.9MB in the beginning and 23.5MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 42.12ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 23.5MB in the beginning and 43.2MB in the end (delta: -19.7MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * RCFGBuilder took 519.16ms. Allocated memory is still 60.8MB. Free memory was 43.2MB in the beginning and 41.0MB in the end (delta: 2.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 46516.25ms. Allocated memory is still 60.8MB. Free memory was 40.7MB in the beginning and 40.5MB in the end (delta: 251.5kB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. * Witness Printer took 83.74ms. Allocated memory is still 60.8MB. Free memory was 40.5MB in the beginning and 36.7MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [a={10:0}, b={14:0}, x={11:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={10:0}, b={14:0}, x={11:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND FALSE !(j <= n) VAL [a={10:0}, b={14:0}, x={11:0}] [L6] COND TRUE !(cond) VAL [a={10:0}, b={14:0}, x={11:0}] [L7] reach_error() VAL [a={10:0}, b={14:0}, x={11:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 46402.35ms, OverallIterations: 5, TraceHistogramMax: 6, EmptinessCheckTime: 18.11ms, AutomataDifference: 38004.60ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 13.52ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 549 SdHoareTripleChecker+Valid, 34353.26ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 549 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 32381.84ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 309 mSDsCounter, 127 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 871 IncrementalHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 127 mSolverCounterUnsat, 0 mSDtfsCounter, 871 mSolverCounterSat, 25.57ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 5034.01ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=4, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 70.15ms AutomataMinimizationTime, 4 MinimizatonAttempts, 222 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 54.20ms SsaConstructionTime, 2099.91ms SatisfiabilityAnalysisTime, 3923.52ms InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 498 SizeOfPredicates, 8 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 76/156 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-29 10:32:12,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...