./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i -s /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca707ecc133af2ec0063556d89a3ce449d0860eb ............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 13:03:06,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:03:06,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:03:06,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:03:06,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:03:06,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:03:06,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:03:06,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:03:06,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:03:06,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:03:06,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:03:06,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:03:06,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:03:06,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:03:06,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:03:06,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:03:06,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:03:06,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:03:06,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:03:06,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:03:06,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:03:06,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:03:06,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:03:06,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:03:06,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:03:06,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:03:06,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:03:06,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:03:06,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:03:06,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:03:06,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:03:06,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:03:06,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:03:06,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:03:06,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:03:06,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:03:06,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:03:06,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:03:06,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:03:06,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:03:06,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:03:06,424 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 13:03:06,434 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:03:06,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:03:06,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 13:03:06,435 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 13:03:06,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 13:03:06,435 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 13:03:06,435 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 13:03:06,435 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 13:03:06,436 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 13:03:06,436 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 13:03:06,436 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 13:03:06,436 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 13:03:06,436 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 13:03:06,436 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 13:03:06,436 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 13:03:06,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:03:06,437 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:03:06,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:03:06,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:03:06,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:03:06,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:03:06,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:03:06,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:03:06,438 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:03:06,438 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:03:06,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:03:06,438 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:03:06,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:03:06,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:03:06,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:03:06,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:03:06,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:03:06,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:03:06,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:03:06,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:03:06,439 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 13:03:06,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:03:06,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:03:06,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:03:06,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 13:03:06,440 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_237be8f6-8b1a-4051-99e4-005eee93b881/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(__VERIFIER_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 -> ca707ecc133af2ec0063556d89a3ce449d0860eb [2019-12-07 13:03:06,538 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:03:06,545 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:03:06,547 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:03:06,548 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:03:06,549 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:03:06,549 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/../../sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2019-12-07 13:03:06,586 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/data/a7c7c02fb/92733141657a42058a9a0aa3d11c3b0f/FLAG43e0cd3ff [2019-12-07 13:03:06,937 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:03:06,937 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/sv-benchmarks/c/loop-invgen/NetBSD_loop.i [2019-12-07 13:03:06,941 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/data/a7c7c02fb/92733141657a42058a9a0aa3d11c3b0f/FLAG43e0cd3ff [2019-12-07 13:03:06,949 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/data/a7c7c02fb/92733141657a42058a9a0aa3d11c3b0f [2019-12-07 13:03:06,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:03:06,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:03:06,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:03:06,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:03:06,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:03:06,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:03:06" (1/1) ... [2019-12-07 13:03:06,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9c9906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:06, skipping insertion in model container [2019-12-07 13:03:06,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:03:06" (1/1) ... [2019-12-07 13:03:06,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:03:06,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:03:07,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:03:07,073 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:03:07,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:03:07,126 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:03:07,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07 WrapperNode [2019-12-07 13:03:07,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:03:07,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:03:07,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:03:07,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:03:07,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (1/1) ... [2019-12-07 13:03:07,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (1/1) ... [2019-12-07 13:03:07,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:03:07,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:03:07,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:03:07,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:03:07,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (1/1) ... [2019-12-07 13:03:07,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (1/1) ... [2019-12-07 13:03:07,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (1/1) ... [2019-12-07 13:03:07,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (1/1) ... [2019-12-07 13:03:07,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (1/1) ... [2019-12-07 13:03:07,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (1/1) ... [2019-12-07 13:03:07,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (1/1) ... [2019-12-07 13:03:07,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:03:07,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:03:07,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:03:07,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:03:07,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/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 [2019-12-07 13:03:07,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:03:07,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:03:07,312 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:03:07,312 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 13:03:07,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:03:07 BoogieIcfgContainer [2019-12-07 13:03:07,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:03:07,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:03:07,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:03:07,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:03:07,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:03:06" (1/3) ... [2019-12-07 13:03:07,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73233033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:03:07, skipping insertion in model container [2019-12-07 13:03:07,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:03:07" (2/3) ... [2019-12-07 13:03:07,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73233033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:03:07, skipping insertion in model container [2019-12-07 13:03:07,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:03:07" (3/3) ... [2019-12-07 13:03:07,317 INFO L109 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2019-12-07 13:03:07,324 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:03:07,327 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-12-07 13:03:07,334 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-12-07 13:03:07,348 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:03:07,349 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:03:07,349 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:03:07,349 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:03:07,349 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:03:07,349 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:03:07,349 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:03:07,349 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:03:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-12-07 13:03:07,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 13:03:07,361 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:03:07,362 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 13:03:07,362 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:03:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:03:07,365 INFO L82 PathProgramCache]: Analyzing trace with hash 30968835, now seen corresponding path program 1 times [2019-12-07 13:03:07,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:03:07,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718851682] [2019-12-07 13:03:07,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:03:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:03:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:07,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718851682] [2019-12-07 13:03:07,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:03:07,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:03:07,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236874314] [2019-12-07 13:03:07,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:03:07,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:03:07,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:03:07,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:03:07,488 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2019-12-07 13:03:07,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:03:07,529 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-12-07 13:03:07,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:03:07,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-12-07 13:03:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:03:07,536 INFO L225 Difference]: With dead ends: 27 [2019-12-07 13:03:07,536 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 13:03:07,538 INFO L630 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 [2019-12-07 13:03:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 13:03:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-12-07 13:03:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 13:03:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-12-07 13:03:07,559 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2019-12-07 13:03:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:03:07,560 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-12-07 13:03:07,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:03:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-12-07 13:03:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 13:03:07,560 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:03:07,560 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:03:07,560 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:03:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:03:07,561 INFO L82 PathProgramCache]: Analyzing trace with hash -303564954, now seen corresponding path program 1 times [2019-12-07 13:03:07,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:03:07,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287692652] [2019-12-07 13:03:07,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:03:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:03:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:07,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287692652] [2019-12-07 13:03:07,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:03:07,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:03:07,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936265176] [2019-12-07 13:03:07,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:03:07,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:03:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:03:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:03:07,594 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2019-12-07 13:03:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:03:07,620 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-12-07 13:03:07,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:03:07,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 13:03:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:03:07,621 INFO L225 Difference]: With dead ends: 16 [2019-12-07 13:03:07,621 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 13:03:07,622 INFO L630 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 [2019-12-07 13:03:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 13:03:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-12-07 13:03:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 13:03:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-12-07 13:03:07,625 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2019-12-07 13:03:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:03:07,625 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-12-07 13:03:07,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:03:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-12-07 13:03:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 13:03:07,626 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:03:07,626 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 13:03:07,626 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:03:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:03:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash -353986803, now seen corresponding path program 1 times [2019-12-07 13:03:07,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:03:07,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584154208] [2019-12-07 13:03:07,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:03:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:03:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:07,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584154208] [2019-12-07 13:03:07,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088554924] [2019-12-07 13:03:07,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/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 [2019-12-07 13:03:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:03:07,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 13:03:07,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:03:07,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:03:07,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:03:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:07,772 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:03:07,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:03:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:03:07,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1806706902] [2019-12-07 13:03:07,824 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:03:07,824 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:03:07,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:03:07,835 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:03:07,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:03:07,953 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:03:08,344 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:03:08,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:03:08,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2019-12-07 13:03:08,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517635660] [2019-12-07 13:03:08,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 13:03:08,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:03:08,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 13:03:08,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:03:08,346 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2019-12-07 13:03:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:03:08,406 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-12-07 13:03:08,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:03:08,406 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2019-12-07 13:03:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:03:08,407 INFO L225 Difference]: With dead ends: 22 [2019-12-07 13:03:08,407 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 13:03:08,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2019-12-07 13:03:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 13:03:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-12-07 13:03:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 13:03:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-12-07 13:03:08,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2019-12-07 13:03:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:03:08,411 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-12-07 13:03:08,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 13:03:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-12-07 13:03:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 13:03:08,412 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:03:08,412 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-12-07 13:03:08,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:03:08,613 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:03:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:03:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash -869488698, now seen corresponding path program 2 times [2019-12-07 13:03:08,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:03:08,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487454204] [2019-12-07 13:03:08,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:03:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:03:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 13:03:08,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487454204] [2019-12-07 13:03:08,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726603410] [2019-12-07 13:03:08,680 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/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 [2019-12-07 13:03:08,702 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-12-07 13:03:08,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:03:08,703 INFO L264 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 13:03:08,704 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:03:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 13:03:08,734 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:03:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 13:03:08,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186155864] [2019-12-07 13:03:08,763 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 13:03:08,763 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:03:08,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:03:08,764 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:03:08,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:03:08,823 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:03:09,191 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:03:09,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:03:09,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2019-12-07 13:03:09,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980360707] [2019-12-07 13:03:09,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:03:09,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:03:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:03:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-12-07 13:03:09,193 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-12-07 13:03:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:03:09,245 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-12-07 13:03:09,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:03:09,246 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-12-07 13:03:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:03:09,246 INFO L225 Difference]: With dead ends: 18 [2019-12-07 13:03:09,246 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 13:03:09,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-07 13:03:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 13:03:09,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 13:03:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 13:03:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 13:03:09,248 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2019-12-07 13:03:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:03:09,248 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:03:09,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:03:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 13:03:09,248 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 13:03:09,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:03:09,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 13:03:09,534 INFO L246 CegarLoopResult]: For program point L4-3(lines 4 6) no Hoare annotation was computed. [2019-12-07 13:03:09,534 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 13:03:09,535 INFO L242 CegarLoopResult]: At program point L4-5(lines 1 31) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 ULTIMATE.start_main_~glob2_p_off~0) (<= ULTIMATE.start_main_~glob2_p_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0)) [2019-12-07 13:03:09,535 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-12-07 13:03:09,535 INFO L246 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2019-12-07 13:03:09,535 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-12-07 13:03:09,536 INFO L246 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2019-12-07 13:03:09,536 INFO L249 CegarLoopResult]: At program point L30(lines 11 31) the Hoare annotation is: true [2019-12-07 13:03:09,537 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 13:03:09,537 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-12-07 13:03:09,537 INFO L242 CegarLoopResult]: At program point L24-2(lines 24 29) the Hoare annotation is: (let ((.cse0 (<= 0 ULTIMATE.start_main_~glob2_p_off~0)) (.cse1 (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0))) (or (and .cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1) (and (<= ULTIMATE.start_main_~glob2_p_off~0 0) .cse0 (<= (+ ULTIMATE.start_main_~glob2_p_off~0 1) ULTIMATE.start_main_~MAXPATHLEN~0) .cse1))) [2019-12-07 13:03:09,537 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-12-07 13:03:09,537 INFO L242 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 ULTIMATE.start_main_~glob2_p_off~0) (<= ULTIMATE.start_main_~glob2_p_off~0 ULTIMATE.start_main_~MAXPATHLEN~0) (<= ULTIMATE.start_main_~glob2_pathlim_off~0 ULTIMATE.start_main_~MAXPATHLEN~0)) [2019-12-07 13:03:09,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:03:09 BoogieIcfgContainer [2019-12-07 13:03:09,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:03:09,550 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:03:09,550 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:03:09,550 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:03:09,550 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:03:07" (3/4) ... [2019-12-07 13:03:09,552 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 13:03:09,558 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-12-07 13:03:09,559 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 13:03:09,559 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 13:03:09,589 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_237be8f6-8b1a-4051-99e4-005eee93b881/bin/utaipan/witness.graphml [2019-12-07 13:03:09,590 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:03:09,591 INFO L168 Benchmark]: Toolchain (without parser) took 2638.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.9 MB). Free memory was 943.5 MB in the beginning and 978.9 MB in the end (delta: -35.3 MB). Peak memory consumption was 70.6 MB. Max. memory is 11.5 GB. [2019-12-07 13:03:09,591 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:03:09,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.9 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -158.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:03:09,592 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.06 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:03:09,592 INFO L168 Benchmark]: Boogie Preprocessor took 12.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:03:09,593 INFO L168 Benchmark]: RCFGBuilder took 154.02 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 13:03:09,593 INFO L168 Benchmark]: TraceAbstraction took 2236.01 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 980.6 MB in the end (delta: 102.5 MB). Peak memory consumption was 102.5 MB. Max. memory is 11.5 GB. [2019-12-07 13:03:09,593 INFO L168 Benchmark]: Witness Printer took 40.03 ms. Allocated memory is still 1.1 GB. Free memory was 980.6 MB in the beginning and 978.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:03:09,595 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 173.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.9 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -158.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.06 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 154.02 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2236.01 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 980.6 MB in the end (delta: 102.5 MB). Peak memory consumption was 102.5 MB. Max. memory is 11.5 GB. * Witness Printer took 40.03 ms. Allocated memory is still 1.1 GB. Free memory was 980.6 MB in the beginning and 978.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((1 == cond && 0 <= glob2_p_off) && glob2_p_off <= MAXPATHLEN) && glob2_pathlim_off <= MAXPATHLEN - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((0 <= glob2_p_off && 1 == cond) && glob2_pathlim_off <= MAXPATHLEN) || (((glob2_p_off <= 0 && 0 <= glob2_p_off) && glob2_p_off + 1 <= MAXPATHLEN) && glob2_pathlim_off <= MAXPATHLEN) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: ((1 == cond && 0 <= glob2_p_off) && glob2_p_off <= MAXPATHLEN) && glob2_pathlim_off <= MAXPATHLEN - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Result: SAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 40 SDslu, 32 SDs, 0 SdLazy, 72 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s 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, 53 HoareAnnotationTreeSize, 4 FomulaSimplifications, 222 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 70 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 5649 SizeOfPredicates, 20 NumberOfNonLiveVariables, 75 ConjunctsInSsa, 31 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...