./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/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 5cba8acfa381c990ec40e4bf9e5d202ee845a576 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 06:55:38,263 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 06:55:38,264 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 06:55:38,272 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 06:55:38,272 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 06:55:38,273 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 06:55:38,274 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 06:55:38,275 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 06:55:38,277 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 06:55:38,277 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 06:55:38,278 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 06:55:38,278 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 06:55:38,279 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 06:55:38,280 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 06:55:38,281 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 06:55:38,281 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 06:55:38,282 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 06:55:38,283 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 06:55:38,285 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 06:55:38,286 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 06:55:38,287 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 06:55:38,287 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 06:55:38,289 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 06:55:38,289 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 06:55:38,290 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 06:55:38,290 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 06:55:38,291 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 06:55:38,292 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 06:55:38,292 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 06:55:38,293 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 06:55:38,293 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 06:55:38,294 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 06:55:38,294 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 06:55:38,294 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 06:55:38,295 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 06:55:38,295 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 06:55:38,295 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 06:55:38,305 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 06:55:38,306 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 06:55:38,306 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 06:55:38,307 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 06:55:38,307 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 06:55:38,307 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 06:55:38,307 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 06:55:38,307 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 06:55:38,307 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 06:55:38,308 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 06:55:38,308 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 06:55:38,308 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 06:55:38,308 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 06:55:38,309 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 06:55:38,309 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 06:55:38,309 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 06:55:38,309 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 06:55:38,309 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 06:55:38,309 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 06:55:38,309 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 06:55:38,310 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 06:55:38,310 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 06:55:38,310 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 06:55:38,310 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 06:55:38,310 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 06:55:38,310 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 06:55:38,310 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 06:55:38,311 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 06:55:38,311 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 06:55:38,311 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 06:55:38,311 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 06:55:38,311 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 06:55:38,311 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 06:55:38,311 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 06:55:38,312 INFO L133 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/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 [2018-11-10 06:55:38,337 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 06:55:38,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 06:55:38,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 06:55:38,351 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 06:55:38,351 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 06:55:38,352 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/../../sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i [2018-11-10 06:55:38,393 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/data/ebcc61d9f/78789df3ca8d4652892ac63a264ab7c0/FLAGfab62be92 [2018-11-10 06:55:38,799 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 06:55:38,799 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i [2018-11-10 06:55:38,805 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/data/ebcc61d9f/78789df3ca8d4652892ac63a264ab7c0/FLAGfab62be92 [2018-11-10 06:55:38,816 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/data/ebcc61d9f/78789df3ca8d4652892ac63a264ab7c0 [2018-11-10 06:55:38,819 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 06:55:38,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 06:55:38,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 06:55:38,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 06:55:38,823 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 06:55:38,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5752aec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38, skipping insertion in model container [2018-11-10 06:55:38,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 06:55:38,845 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 06:55:38,948 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:55:38,950 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 06:55:38,961 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:55:38,970 INFO L193 MainTranslator]: Completed translation [2018-11-10 06:55:38,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38 WrapperNode [2018-11-10 06:55:38,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 06:55:38,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 06:55:38,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 06:55:38,971 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 06:55:38,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 06:55:38,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 06:55:38,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 06:55:38,984 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 06:55:38,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (1/1) ... [2018-11-10 06:55:38,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 06:55:38,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 06:55:38,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 06:55:38,997 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 06:55:38,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/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 [2018-11-10 06:55:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 06:55:39,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 06:55:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 06:55:39,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 06:55:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 06:55:39,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 06:55:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 06:55:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 06:55:39,193 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 06:55:39,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:55:39 BoogieIcfgContainer [2018-11-10 06:55:39,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 06:55:39,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 06:55:39,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 06:55:39,197 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 06:55:39,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:55:38" (1/3) ... [2018-11-10 06:55:39,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119a0f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:55:39, skipping insertion in model container [2018-11-10 06:55:39,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:55:38" (2/3) ... [2018-11-10 06:55:39,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119a0f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:55:39, skipping insertion in model container [2018-11-10 06:55:39,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:55:39" (3/3) ... [2018-11-10 06:55:39,200 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_false-unreach-call_true-termination.i [2018-11-10 06:55:39,208 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 06:55:39,215 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 06:55:39,230 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 06:55:39,258 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 06:55:39,258 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 06:55:39,258 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 06:55:39,259 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 06:55:39,259 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 06:55:39,259 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 06:55:39,259 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 06:55:39,259 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 06:55:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 06:55:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 06:55:39,280 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:55:39,280 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:55:39,282 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:55:39,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-11-10 06:55:39,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:55:39,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:39,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:55:39,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:39,335 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:55:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:39,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:55:39,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 06:55:39,388 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:55:39,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 06:55:39,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 06:55:39,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 06:55:39,401 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-11-10 06:55:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:55:39,413 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-11-10 06:55:39,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 06:55:39,414 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 06:55:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:55:39,422 INFO L225 Difference]: With dead ends: 31 [2018-11-10 06:55:39,422 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 06:55:39,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 06:55:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 06:55:39,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 06:55:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 06:55:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-10 06:55:39,453 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-10 06:55:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:55:39,453 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-10 06:55:39,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 06:55:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-10 06:55:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 06:55:39,453 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:55:39,454 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:55:39,454 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:55:39,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:39,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-11-10 06:55:39,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:55:39,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:39,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:55:39,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:39,456 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:55:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:39,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:55:39,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:55:39,520 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:55:39,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 06:55:39,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 06:55:39,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:55:39,521 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-11-10 06:55:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:55:39,551 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-11-10 06:55:39,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:55:39,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-10 06:55:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:55:39,551 INFO L225 Difference]: With dead ends: 23 [2018-11-10 06:55:39,552 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 06:55:39,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:55:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 06:55:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 06:55:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 06:55:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-11-10 06:55:39,556 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2018-11-10 06:55:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:55:39,556 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-11-10 06:55:39,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 06:55:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-11-10 06:55:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-10 06:55:39,557 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:55:39,557 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:55:39,557 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:55:39,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-11-10 06:55:39,558 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:55:39,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:39,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:55:39,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:39,559 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:55:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:39,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:39,784 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:55:39,785 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-10 06:55:39,786 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [20], [26], [29], [31], [37], [38], [39], [41] [2018-11-10 06:55:39,819 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:55:39,819 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:55:39,902 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 06:55:40,095 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 06:55:40,096 INFO L272 AbstractInterpreter]: Visited 14 different actions 157 times. Merged at 5 different actions 80 times. Widened at 1 different actions 12 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-11-10 06:55:40,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:40,111 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 06:55:40,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:40,111 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:55:40,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:55:40,123 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 06:55:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:40,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:55:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:40,380 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:55:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:40,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:55:40,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2018-11-10 06:55:40,562 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:55:40,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 06:55:40,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 06:55:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-11-10 06:55:40,563 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 14 states. [2018-11-10 06:55:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:55:40,762 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-11-10 06:55:40,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 06:55:40,762 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2018-11-10 06:55:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:55:40,762 INFO L225 Difference]: With dead ends: 43 [2018-11-10 06:55:40,763 INFO L226 Difference]: Without dead ends: 26 [2018-11-10 06:55:40,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2018-11-10 06:55:40,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-10 06:55:40,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2018-11-10 06:55:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 06:55:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 06:55:40,767 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2018-11-10 06:55:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:55:40,768 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 06:55:40,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 06:55:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 06:55:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-10 06:55:40,769 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:55:40,769 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:55:40,769 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:55:40,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:40,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1873071752, now seen corresponding path program 2 times [2018-11-10 06:55:40,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:55:40,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:40,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:55:40,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:40,771 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:55:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-10 06:55:40,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:40,923 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:55:40,923 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 06:55:40,924 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 06:55:40,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:40,924 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:55:40,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 06:55:40,940 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 06:55:40,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 06:55:40,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:55:40,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:55:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:41,080 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:55:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:41,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:55:41,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2018-11-10 06:55:41,342 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:55:41,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 06:55:41,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 06:55:41,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2018-11-10 06:55:41,343 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 19 states. [2018-11-10 06:55:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:55:41,710 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2018-11-10 06:55:41,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 06:55:41,711 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2018-11-10 06:55:41,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:55:41,712 INFO L225 Difference]: With dead ends: 47 [2018-11-10 06:55:41,712 INFO L226 Difference]: Without dead ends: 34 [2018-11-10 06:55:41,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 06:55:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-10 06:55:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-10 06:55:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 06:55:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-11-10 06:55:41,716 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2018-11-10 06:55:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:55:41,716 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-11-10 06:55:41,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 06:55:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-11-10 06:55:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 06:55:41,717 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:55:41,717 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:55:41,718 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:55:41,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:41,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1162834632, now seen corresponding path program 1 times [2018-11-10 06:55:41,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:55:41,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:41,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:55:41,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:41,719 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:55:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:41,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:41,764 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:55:41,764 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-11-10 06:55:41,764 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [26], [29], [31], [37], [38], [39], [41] [2018-11-10 06:55:41,765 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:55:41,765 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:55:41,768 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 06:55:41,961 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 06:55:41,961 INFO L272 AbstractInterpreter]: Visited 15 different actions 276 times. Merged at 6 different actions 140 times. Widened at 1 different actions 21 times. Found 23 fixpoints after 3 different actions. Largest state had 5 variables. [2018-11-10 06:55:41,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:41,966 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 06:55:41,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:41,966 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:55:41,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:55:41,976 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 06:55:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:41,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:55:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:41,992 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:55:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:55:42,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2018-11-10 06:55:42,064 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:55:42,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 06:55:42,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 06:55:42,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:55:42,064 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 7 states. [2018-11-10 06:55:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:55:42,086 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-11-10 06:55:42,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 06:55:42,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2018-11-10 06:55:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:55:42,087 INFO L225 Difference]: With dead ends: 47 [2018-11-10 06:55:42,087 INFO L226 Difference]: Without dead ends: 38 [2018-11-10 06:55:42,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:55:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-10 06:55:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-11-10 06:55:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-10 06:55:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-11-10 06:55:42,091 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2018-11-10 06:55:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:55:42,091 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-11-10 06:55:42,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 06:55:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-11-10 06:55:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-10 06:55:42,092 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:55:42,092 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:55:42,092 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:55:42,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:42,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1192139823, now seen corresponding path program 2 times [2018-11-10 06:55:42,092 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:55:42,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:42,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:55:42,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:42,093 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:55:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:42,145 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:55:42,145 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 06:55:42,145 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 06:55:42,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:42,145 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:55:42,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 06:55:42,156 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 06:55:42,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-10 06:55:42,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:55:42,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:55:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:55:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:55:42,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2018-11-10 06:55:42,227 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:55:42,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 06:55:42,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 06:55:42,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:55:42,228 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 8 states. [2018-11-10 06:55:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:55:42,269 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-11-10 06:55:42,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 06:55:42,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2018-11-10 06:55:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:55:42,272 INFO L225 Difference]: With dead ends: 51 [2018-11-10 06:55:42,272 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 06:55:42,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:55:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 06:55:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-11-10 06:55:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-10 06:55:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-11-10 06:55:42,278 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2018-11-10 06:55:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:55:42,278 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-11-10 06:55:42,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 06:55:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-11-10 06:55:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 06:55:42,279 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:55:42,279 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:55:42,279 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:55:42,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1196316582, now seen corresponding path program 3 times [2018-11-10 06:55:42,280 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:55:42,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:42,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:55:42,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:42,281 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:55:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:42,341 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:55:42,341 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 06:55:42,341 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 06:55:42,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:42,341 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:55:42,360 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 06:55:42,360 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 06:55:42,381 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 06:55:42,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:55:42,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:55:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:55:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:55:42,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2018-11-10 06:55:42,482 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:55:42,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 06:55:42,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 06:55:42,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:55:42,483 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2018-11-10 06:55:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:55:42,509 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-11-10 06:55:42,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 06:55:42,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-11-10 06:55:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:55:42,510 INFO L225 Difference]: With dead ends: 55 [2018-11-10 06:55:42,510 INFO L226 Difference]: Without dead ends: 46 [2018-11-10 06:55:42,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:55:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-10 06:55:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-11-10 06:55:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 06:55:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-11-10 06:55:42,515 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2018-11-10 06:55:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:55:42,516 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-11-10 06:55:42,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 06:55:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-11-10 06:55:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 06:55:42,517 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:55:42,517 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:55:42,517 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:55:42,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:42,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1640333213, now seen corresponding path program 4 times [2018-11-10 06:55:42,517 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:55:42,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:42,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:55:42,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:42,518 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:55:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:42,575 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:55:42,575 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 06:55:42,575 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 06:55:42,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:42,575 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:55:42,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:55:42,581 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 06:55:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:42,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:55:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:55:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:55:42,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2018-11-10 06:55:42,662 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:55:42,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 06:55:42,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 06:55:42,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:55:42,663 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 10 states. [2018-11-10 06:55:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:55:42,694 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-11-10 06:55:42,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 06:55:42,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-10 06:55:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:55:42,695 INFO L225 Difference]: With dead ends: 59 [2018-11-10 06:55:42,695 INFO L226 Difference]: Without dead ends: 50 [2018-11-10 06:55:42,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:55:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-10 06:55:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-11-10 06:55:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-10 06:55:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-11-10 06:55:42,699 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2018-11-10 06:55:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:55:42,700 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-11-10 06:55:42,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 06:55:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-11-10 06:55:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-10 06:55:42,700 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:55:42,701 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:55:42,701 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:55:42,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1679174636, now seen corresponding path program 5 times [2018-11-10 06:55:42,701 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:55:42,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:42,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:55:42,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:42,702 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:55:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:55:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:42,775 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:55:42,775 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 06:55:42,775 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 06:55:42,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:55:42,775 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:55:42,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 06:55:42,782 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 06:55:42,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 06:55:42,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:55:42,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:55:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,816 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:55:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:55:42,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:55:42,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2018-11-10 06:55:42,869 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:55:42,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 06:55:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 06:55:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:55:42,870 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 11 states. [2018-11-10 06:55:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:55:42,910 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-11-10 06:55:42,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 06:55:42,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-11-10 06:55:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:55:42,911 INFO L225 Difference]: With dead ends: 63 [2018-11-10 06:55:42,911 INFO L226 Difference]: Without dead ends: 54 [2018-11-10 06:55:42,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:55:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-10 06:55:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-11-10 06:55:42,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-10 06:55:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-11-10 06:55:42,917 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 47 [2018-11-10 06:55:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:55:42,917 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-11-10 06:55:42,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 06:55:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-11-10 06:55:42,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-10 06:55:42,921 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:55:42,921 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:55:42,921 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:55:42,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:55:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash 900655861, now seen corresponding path program 6 times [2018-11-10 06:55:42,922 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:55:42,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:42,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:55:42,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:55:42,923 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:55:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 06:55:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 06:55:42,955 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 06:55:42,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 06:55:42 BoogieIcfgContainer [2018-11-10 06:55:42,984 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 06:55:42,984 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 06:55:42,984 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 06:55:42,985 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 06:55:42,985 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:55:39" (3/4) ... [2018-11-10 06:55:42,987 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 06:55:43,036 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_07df2809-7972-42d2-99a1-bceedb09f21c/bin-2019/utaipan/witness.graphml [2018-11-10 06:55:43,037 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 06:55:43,037 INFO L168 Benchmark]: Toolchain (without parser) took 4218.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 963.4 MB in the beginning and 1.1 GB in the end (delta: -148.0 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. [2018-11-10 06:55:43,038 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:55:43,039 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.17 ms. Allocated memory is still 1.0 GB. Free memory was 963.4 MB in the beginning and 952.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 06:55:43,039 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.62 ms. Allocated memory is still 1.0 GB. Free memory is still 952.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:55:43,039 INFO L168 Benchmark]: Boogie Preprocessor took 13.47 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 947.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-10 06:55:43,039 INFO L168 Benchmark]: RCFGBuilder took 196.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -165.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2018-11-10 06:55:43,040 INFO L168 Benchmark]: TraceAbstraction took 3790.16 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.2 MB). Peak memory consumption was 43.1 MB. Max. memory is 11.5 GB. [2018-11-10 06:55:43,040 INFO L168 Benchmark]: Witness Printer took 52.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2018-11-10 06:55:43,041 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.17 ms. Allocated memory is still 1.0 GB. Free memory was 963.4 MB in the beginning and 952.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.62 ms. Allocated memory is still 1.0 GB. Free memory is still 952.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.47 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 947.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 196.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -165.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3790.16 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.2 MB). Peak memory consumption was 43.1 MB. Max. memory is 11.5 GB. * Witness Printer took 52.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=10] [L13] COND TRUE i<=n VAL [i=1, n=10, n=0] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=1, n=10, n=2] [L13] i++ VAL [i=2, n=10, n=2] [L13] COND TRUE i<=n VAL [i=2, n=10, n=2] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=2, n=10, n=4] [L13] i++ VAL [i=3, n=4, n=10] [L13] COND TRUE i<=n VAL [i=3, n=10, n=4] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=3, n=10, n=6] [L13] i++ VAL [i=4, n=6, n=10] [L13] COND TRUE i<=n VAL [i=4, n=6, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=4, n=8, n=10] [L13] i++ VAL [i=5, n=8, n=10] [L13] COND TRUE i<=n VAL [i=5, n=10, n=8] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=6, n=12, n=10] [L13] i++ VAL [i=7, n=10, n=12] [L13] COND TRUE i<=n VAL [i=7, n=10, n=12] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=7, n=14, n=10] [L13] i++ VAL [i=8, n=14, n=10] [L13] COND TRUE i<=n VAL [i=8, n=14, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=8, n=10, n=16] [L13] i++ VAL [i=9, n=16, n=10] [L13] COND TRUE i<=n VAL [i=9, n=16, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=9, n=10, n=18] [L13] i++ VAL [i=10, n=10, n=18] [L13] COND TRUE i<=n VAL [i=10, n=18, n=10] [L14] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L13] i++ VAL [i=11, n=10, n=18] [L13] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 3.7s OverallTime, 10 OverallIterations, 11 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 59 SDslu, 488 SDs, 0 SdLazy, 459 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 552 GetRequests, 411 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 538 NumberOfCodeBlocks, 538 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 697 ConstructedInterpolants, 12 QuantifiedInterpolants, 73813 SizeOfPredicates, 13 NumberOfNonLiveVariables, 452 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 308/1590 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...