./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff8bf597c44bf4fad2da445c30313c8319221d6a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:31:35,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:31:35,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:31:35,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:31:35,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:31:35,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:31:35,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:31:35,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:31:35,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:31:35,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:31:35,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:31:35,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:31:35,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:31:35,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:31:35,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:31:35,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:31:35,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:31:35,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:31:35,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:31:35,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:31:35,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:31:35,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:31:35,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:31:35,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:31:35,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:31:35,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:31:35,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:31:35,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:31:35,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:31:35,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:31:35,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:31:35,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:31:35,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:31:35,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:31:35,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:31:35,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:31:35,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:31:35,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:31:35,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:31:35,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:31:35,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:31:35,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-03 12:31:35,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:31:35,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:31:35,600 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:31:35,600 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:31:35,601 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:31:35,601 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:31:35,601 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:31:35,602 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:31:35,602 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:31:35,602 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:31:35,604 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:31:35,604 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:31:35,604 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:31:35,605 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:31:35,605 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:31:35,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:31:35,607 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:31:35,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:31:35,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:31:35,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:31:35,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:31:35,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:31:35,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:31:35,609 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:31:35,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:31:35,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:31:35,610 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:31:35,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:31:35,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:31:35,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:31:35,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:31:35,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:31:35,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:31:35,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:31:35,613 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:31:35,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:31:35,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:31:35,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:31:35,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:31:35,615 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff8bf597c44bf4fad2da445c30313c8319221d6a [2020-12-03 12:31:35,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:31:36,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:31:36,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:31:36,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:31:36,031 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:31:36,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2020-12-03 12:31:36,106 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/data/1385d1f92/e663e0f2465e45dea5d15757ef2d4ace/FLAG791b28cdf [2020-12-03 12:31:36,654 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:31:36,655 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2020-12-03 12:31:36,666 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/data/1385d1f92/e663e0f2465e45dea5d15757ef2d4ace/FLAG791b28cdf [2020-12-03 12:31:37,003 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/data/1385d1f92/e663e0f2465e45dea5d15757ef2d4ace [2020-12-03 12:31:37,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:31:37,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:31:37,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:31:37,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:31:37,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:31:37,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d5c52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37, skipping insertion in model container [2020-12-03 12:31:37,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:31:37,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:31:37,207 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/sv-benchmarks/c/loop-invgen/NetBSD_loop.i[893,906] [2020-12-03 12:31:37,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:31:37,261 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:31:37,278 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/sv-benchmarks/c/loop-invgen/NetBSD_loop.i[893,906] [2020-12-03 12:31:37,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:31:37,306 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:31:37,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37 WrapperNode [2020-12-03 12:31:37,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:31:37,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:31:37,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:31:37,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:31:37,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:31:37,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:31:37,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:31:37,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:31:37,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (1/1) ... [2020-12-03 12:31:37,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:31:37,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:31:37,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:31:37,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:31:37,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:31:37,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:31:37,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:31:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:31:37,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:31:37,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:31:37,807 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-03 12:31:37,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:31:37 BoogieIcfgContainer [2020-12-03 12:31:37,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:31:37,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:31:37,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:31:37,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:31:37,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:31:37" (1/3) ... [2020-12-03 12:31:37,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d790d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:31:37, skipping insertion in model container [2020-12-03 12:31:37,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:37" (2/3) ... [2020-12-03 12:31:37,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d790d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:31:37, skipping insertion in model container [2020-12-03 12:31:37,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:31:37" (3/3) ... [2020-12-03 12:31:37,817 INFO L111 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2020-12-03 12:31:37,829 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:31:37,832 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-03 12:31:37,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-03 12:31:37,862 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:31:37,862 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:31:37,862 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:31:37,863 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:31:37,863 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:31:37,863 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:31:37,863 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:31:37,863 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:31:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-03 12:31:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:31:37,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:31:37,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:31:37,897 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:31:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:31:37,917 INFO L82 PathProgramCache]: Analyzing trace with hash 74434897, now seen corresponding path program 1 times [2020-12-03 12:31:37,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:31:37,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888685360] [2020-12-03 12:31:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:31:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:31:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:31:38,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888685360] [2020-12-03 12:31:38,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:31:38,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:31:38,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123861075] [2020-12-03 12:31:38,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:31:38,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:31:38,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:31:38,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:31:38,211 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2020-12-03 12:31:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:31:38,324 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-03 12:31:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:31:38,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-03 12:31:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:31:38,343 INFO L225 Difference]: With dead ends: 27 [2020-12-03 12:31:38,344 INFO L226 Difference]: Without dead ends: 10 [2020-12-03 12:31:38,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:31:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-03 12:31:38,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-03 12:31:38,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-03 12:31:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-03 12:31:38,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2020-12-03 12:31:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:31:38,389 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-03 12:31:38,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:31:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-03 12:31:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 12:31:38,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:31:38,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:31:38,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:31:38,392 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:31:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:31:38,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1482352300, now seen corresponding path program 1 times [2020-12-03 12:31:38,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:31:38,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574040875] [2020-12-03 12:31:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:31:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:31:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:31:38,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574040875] [2020-12-03 12:31:38,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:31:38,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:31:38,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104777850] [2020-12-03 12:31:38,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:31:38,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:31:38,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:31:38,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:31:38,512 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2020-12-03 12:31:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:31:38,561 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-03 12:31:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:31:38,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-03 12:31:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:31:38,562 INFO L225 Difference]: With dead ends: 16 [2020-12-03 12:31:38,563 INFO L226 Difference]: Without dead ends: 14 [2020-12-03 12:31:38,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:31:38,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-03 12:31:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-03 12:31:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-03 12:31:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-03 12:31:38,578 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2020-12-03 12:31:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:31:38,578 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-03 12:31:38,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:31:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-03 12:31:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 12:31:38,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:31:38,580 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-03 12:31:38,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:31:38,581 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:31:38,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:31:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1520039520, now seen corresponding path program 1 times [2020-12-03 12:31:38,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:31:38,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645550207] [2020-12-03 12:31:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:31:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:31:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:31:38,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645550207] [2020-12-03 12:31:38,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500524549] [2020-12-03 12:31:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:31:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:31:38,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-03 12:31:38,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:31:38,861 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 12:31:38,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 12:31:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:31:38,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:31:38,902 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:31:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:31:38,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235709562] [2020-12-03 12:31:38,962 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-03 12:31:38,962 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:31:38,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:31:38,972 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:31:38,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:31:39,374 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:31:39,605 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-03 12:31:39,746 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2020-12-03 12:31:39,890 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-03 12:31:40,053 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-03 12:31:40,229 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-03 12:31:40,256 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:31:40,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:31:40,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-03 12:31:40,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806110344] [2020-12-03 12:31:40,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-03 12:31:40,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:31:40,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-03 12:31:40,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-03 12:31:40,259 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2020-12-03 12:31:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:31:40,363 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-03 12:31:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:31:40,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-03 12:31:40,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:31:40,365 INFO L225 Difference]: With dead ends: 22 [2020-12-03 12:31:40,365 INFO L226 Difference]: Without dead ends: 20 [2020-12-03 12:31:40,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-12-03 12:31:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-03 12:31:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-03 12:31:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-03 12:31:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-03 12:31:40,369 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-12-03 12:31:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:31:40,369 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-03 12:31:40,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-03 12:31:40,369 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-03 12:31:40,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-03 12:31:40,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:31:40,370 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-12-03 12:31:40,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-03 12:31:40,594 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:31:40,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:31:40,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1282107604, now seen corresponding path program 2 times [2020-12-03 12:31:40,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:31:40,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559583095] [2020-12-03 12:31:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:31:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:31:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:31:40,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559583095] [2020-12-03 12:31:40,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804716882] [2020-12-03 12:31:40,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:31:40,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-03 12:31:40,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:31:40,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:31:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:31:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:31:40,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:31:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:31:40,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603531353] [2020-12-03 12:31:40,817 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-03 12:31:40,817 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:31:40,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:31:40,818 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:31:40,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:31:41,033 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:31:41,147 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-03 12:31:41,482 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-03 12:31:41,777 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-03 12:31:41,825 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:31:41,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:31:41,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2020-12-03 12:31:41,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240964610] [2020-12-03 12:31:41,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:31:41,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:31:41,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:31:41,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:31:41,827 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-12-03 12:31:41,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:31:41,896 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-03 12:31:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:31:41,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-03 12:31:41,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:31:41,898 INFO L225 Difference]: With dead ends: 18 [2020-12-03 12:31:41,898 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:31:41,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:31:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:31:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:31:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:31:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:31:41,900 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-12-03 12:31:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:31:41,900 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:31:41,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:31:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:31:41,900 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:31:42,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-03 12:31:42,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 12:31:42,200 INFO L262 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-12-03 12:31:42,200 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 12:31:42,200 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2020-12-03 12:31:42,200 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-03 12:31:42,201 INFO L262 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-12-03 12:31:42,201 INFO L265 CegarLoopResult]: At program point L44(lines 25 45) the Hoare annotation is: true [2020-12-03 12:31:42,203 INFO L258 CegarLoopResult]: At program point L38-2(lines 38 43) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0))) (or (and (<= 0 ULTIMATE.start_main_~glob2_p_off~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (= ULTIMATE.start_main_~glob2_p_off~0 0) .cse0 (<= 1 ULTIMATE.start_main_~MAXPATHLEN~0)))) [2020-12-03 12:31:42,208 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 12:31:42,208 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2020-12-03 12:31:42,208 INFO L262 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-12-03 12:31:42,209 INFO L258 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= 0 ULTIMATE.start_main_~glob2_p_off~0) (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (<= ULTIMATE.start_main_~glob2_p_off~0 ULTIMATE.start_main_~MAXPATHLEN~0)) [2020-12-03 12:31:42,209 INFO L262 CegarLoopResult]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2020-12-03 12:31:42,209 INFO L258 CegarLoopResult]: At program point L18-5(lines 1 45) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~glob2_p_off~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (<= ULTIMATE.start_main_~glob2_p_off~0 ULTIMATE.start_main_~MAXPATHLEN~0)) [2020-12-03 12:31:42,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:31:42 BoogieIcfgContainer [2020-12-03 12:31:42,232 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:31:42,233 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:31:42,233 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:31:42,234 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:31:42,234 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:31:37" (3/4) ... [2020-12-03 12:31:42,237 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:31:42,246 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-03 12:31:42,246 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-03 12:31:42,246 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-03 12:31:42,246 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:31:42,295 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b57f55b1-633c-4a6b-a4f1-d12d33d29898/bin/utaipan/witness.graphml [2020-12-03 12:31:42,298 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:31:42,300 INFO L168 Benchmark]: Toolchain (without parser) took 5290.46 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 66.4 MB in the beginning and 103.6 MB in the end (delta: -37.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:42,301 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:31:42,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.21 ms. Allocated memory is still 96.5 MB. Free memory was 66.4 MB in the beginning and 72.7 MB in the end (delta: -6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:42,305 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.45 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:42,306 INFO L168 Benchmark]: Boogie Preprocessor took 40.49 ms. Allocated memory is still 96.5 MB. Free memory was 71.1 MB in the beginning and 70.2 MB in the end (delta: 890.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:31:42,307 INFO L168 Benchmark]: RCFGBuilder took 425.52 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 56.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:42,307 INFO L168 Benchmark]: TraceAbstraction took 4421.89 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 55.6 MB in the beginning and 106.8 MB in the end (delta: -51.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:31:42,308 INFO L168 Benchmark]: Witness Printer took 65.66 ms. Allocated memory is still 142.6 MB. Free memory was 106.8 MB in the beginning and 103.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:42,312 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 295.21 ms. Allocated memory is still 96.5 MB. Free memory was 66.4 MB in the beginning and 72.7 MB in the end (delta: -6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.45 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.49 ms. Allocated memory is still 96.5 MB. Free memory was 71.1 MB in the beginning and 70.2 MB in the end (delta: 890.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 425.52 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 56.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4421.89 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 55.6 MB in the beginning and 106.8 MB in the end (delta: -51.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 65.66 ms. Allocated memory is still 142.6 MB. Free memory was 106.8 MB in the beginning and 103.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((!(0 == cond) && 0 <= glob2_p_off) && glob2_pathlim_off <= MAXPATHLEN) && glob2_p_off <= MAXPATHLEN - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((0 <= glob2_p_off && 1 <= cond) && glob2_pathlim_off <= MAXPATHLEN) && glob2_p_off <= MAXPATHLEN - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((0 <= glob2_p_off && 1 <= cond) && glob2_pathlim_off <= MAXPATHLEN) || ((glob2_p_off == 0 && glob2_pathlim_off <= MAXPATHLEN) && 1 <= MAXPATHLEN) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 24 SDslu, 37 SDs, 0 SdLazy, 65 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 15 NumberOfFragments, 49 HoareAnnotationTreeSize, 4 FomulaSimplifications, 210 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 19 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 70 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 3940 SizeOfPredicates, 14 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 21/51 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 correct! Received shutdown request...