./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/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 e655d34f6b59f7cc9a55d4dc4dc525a41685abad .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 09:12:16,199 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 09:12:16,200 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 09:12:16,207 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 09:12:16,207 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 09:12:16,207 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 09:12:16,208 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 09:12:16,209 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 09:12:16,210 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 09:12:16,210 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 09:12:16,211 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 09:12:16,211 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 09:12:16,212 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 09:12:16,212 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 09:12:16,213 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 09:12:16,213 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 09:12:16,213 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 09:12:16,214 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 09:12:16,215 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 09:12:16,216 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 09:12:16,217 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 09:12:16,217 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 09:12:16,219 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 09:12:16,219 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 09:12:16,219 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 09:12:16,219 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 09:12:16,220 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 09:12:16,220 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 09:12:16,221 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 09:12:16,221 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 09:12:16,222 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 09:12:16,222 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 09:12:16,222 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 09:12:16,222 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 09:12:16,223 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 09:12:16,223 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 09:12:16,223 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 09:12:16,231 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 09:12:16,231 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 09:12:16,232 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 09:12:16,232 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 09:12:16,232 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 09:12:16,232 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 09:12:16,232 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 09:12:16,232 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 09:12:16,232 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 09:12:16,232 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 09:12:16,233 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 09:12:16,233 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 09:12:16,233 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 09:12:16,233 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 09:12:16,233 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 09:12:16,233 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 09:12:16,233 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 09:12:16,234 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 09:12:16,234 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 09:12:16,234 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 09:12:16,234 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 09:12:16,234 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 09:12:16,234 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 09:12:16,234 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 09:12:16,234 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 09:12:16,234 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 09:12:16,234 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 09:12:16,234 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 09:12:16,235 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 09:12:16,235 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 09:12:16,235 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 09:12:16,235 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 09:12:16,235 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 09:12:16,235 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 09:12:16,235 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 09:12:16,235 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 09:12:16,235 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_d87c8b71-267c-4926-be80-d5722685514e/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 -> e655d34f6b59f7cc9a55d4dc4dc525a41685abad [2018-12-09 09:12:16,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 09:12:16,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 09:12:16,264 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 09:12:16,265 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 09:12:16,266 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 09:12:16,266 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/../../sv-benchmarks/c/loops/string_true-unreach-call_true-termination.i [2018-12-09 09:12:16,306 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/data/e722659a0/488eee92071d443692e8b4f285ef2e90/FLAGe9f52edcf [2018-12-09 09:12:16,721 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 09:12:16,722 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/sv-benchmarks/c/loops/string_true-unreach-call_true-termination.i [2018-12-09 09:12:16,725 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/data/e722659a0/488eee92071d443692e8b4f285ef2e90/FLAGe9f52edcf [2018-12-09 09:12:16,733 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/data/e722659a0/488eee92071d443692e8b4f285ef2e90 [2018-12-09 09:12:16,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 09:12:16,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 09:12:16,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 09:12:16,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 09:12:16,739 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 09:12:16,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@870cb06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16, skipping insertion in model container [2018-12-09 09:12:16,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 09:12:16,755 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 09:12:16,846 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:12:16,848 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 09:12:16,862 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:12:16,873 INFO L195 MainTranslator]: Completed translation [2018-12-09 09:12:16,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16 WrapperNode [2018-12-09 09:12:16,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 09:12:16,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 09:12:16,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 09:12:16,874 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 09:12:16,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 09:12:16,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 09:12:16,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 09:12:16,888 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 09:12:16,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (1/1) ... [2018-12-09 09:12:16,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 09:12:16,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 09:12:16,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 09:12:16,939 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 09:12:16,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/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 [2018-12-09 09:12:16,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 09:12:16,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 09:12:16,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 09:12:16,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 09:12:16,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 09:12:16,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 09:12:16,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 09:12:16,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 09:12:16,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 09:12:16,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 09:12:16,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 09:12:16,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 09:12:17,124 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 09:12:17,125 INFO L280 CfgBuilder]: Removed 5 assue(true) statements. [2018-12-09 09:12:17,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:12:17 BoogieIcfgContainer [2018-12-09 09:12:17,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 09:12:17,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 09:12:17,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 09:12:17,129 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 09:12:17,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:12:16" (1/3) ... [2018-12-09 09:12:17,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eae8444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:12:17, skipping insertion in model container [2018-12-09 09:12:17,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:12:16" (2/3) ... [2018-12-09 09:12:17,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eae8444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:12:17, skipping insertion in model container [2018-12-09 09:12:17,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:12:17" (3/3) ... [2018-12-09 09:12:17,132 INFO L112 eAbstractionObserver]: Analyzing ICFG string_true-unreach-call_true-termination.i [2018-12-09 09:12:17,140 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 09:12:17,145 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 09:12:17,155 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 09:12:17,179 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 09:12:17,179 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 09:12:17,179 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 09:12:17,179 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 09:12:17,179 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 09:12:17,179 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 09:12:17,179 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 09:12:17,179 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 09:12:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2018-12-09 09:12:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 09:12:17,193 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:12:17,193 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:12:17,195 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:12:17,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:12:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash -99599224, now seen corresponding path program 1 times [2018-12-09 09:12:17,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:12:17,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:17,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:12:17,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:17,232 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:12:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:12:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:12:17,281 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:12:17,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 09:12:17,281 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:12:17,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 09:12:17,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 09:12:17,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 09:12:17,293 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2018-12-09 09:12:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:12:17,305 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2018-12-09 09:12:17,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 09:12:17,306 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-12-09 09:12:17,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:12:17,310 INFO L225 Difference]: With dead ends: 62 [2018-12-09 09:12:17,310 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 09:12:17,312 INFO L631 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 [2018-12-09 09:12:17,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 09:12:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-09 09:12:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-09 09:12:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2018-12-09 09:12:17,332 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2018-12-09 09:12:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:12:17,333 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2018-12-09 09:12:17,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 09:12:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2018-12-09 09:12:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-09 09:12:17,333 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:12:17,333 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:12:17,334 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:12:17,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:12:17,334 INFO L82 PathProgramCache]: Analyzing trace with hash 930552028, now seen corresponding path program 1 times [2018-12-09 09:12:17,334 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:12:17,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:17,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:12:17,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:17,335 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:12:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:12:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:12:17,368 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:12:17,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 09:12:17,368 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:12:17,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 09:12:17,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 09:12:17,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 09:12:17,369 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2018-12-09 09:12:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:12:17,407 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2018-12-09 09:12:17,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 09:12:17,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2018-12-09 09:12:17,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:12:17,409 INFO L225 Difference]: With dead ends: 56 [2018-12-09 09:12:17,410 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 09:12:17,410 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 09:12:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 09:12:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2018-12-09 09:12:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 09:12:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2018-12-09 09:12:17,414 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2018-12-09 09:12:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:12:17,414 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2018-12-09 09:12:17,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 09:12:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2018-12-09 09:12:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-09 09:12:17,415 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:12:17,415 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:12:17,415 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:12:17,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:12:17,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1358146588, now seen corresponding path program 1 times [2018-12-09 09:12:17,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:12:17,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:17,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:12:17,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:17,416 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:12:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:12:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:12:17,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:12:17,454 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:12:17,454 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-12-09 09:12:17,455 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [23], [29], [31], [33], [37], [41], [46], [49], [55], [60], [63], [72], [79], [91], [95], [98], [100], [106], [107], [108], [110] [2018-12-09 09:12:17,475 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 09:12:17,475 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 09:12:17,609 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 09:12:17,610 INFO L272 AbstractInterpreter]: Visited 28 different actions 57 times. Merged at 12 different actions 22 times. Widened at 1 different actions 1 times. Performed 300 root evaluator evaluations with a maximum evaluation depth of 6. Performed 300 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 5 fixpoints after 5 different actions. Largest state had 27 variables. [2018-12-09 09:12:17,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:12:17,616 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 09:12:17,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:12:17,616 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/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 [2018-12-09 09:12:17,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:12:17,623 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:12:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:12:17,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:12:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:12:17,659 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:12:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:12:17,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:12:17,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-09 09:12:17,690 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:12:17,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 09:12:17,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 09:12:17,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-09 09:12:17,691 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2018-12-09 09:12:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:12:17,733 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2018-12-09 09:12:17,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 09:12:17,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-12-09 09:12:17,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:12:17,734 INFO L225 Difference]: With dead ends: 65 [2018-12-09 09:12:17,734 INFO L226 Difference]: Without dead ends: 44 [2018-12-09 09:12:17,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-09 09:12:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-09 09:12:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2018-12-09 09:12:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-09 09:12:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2018-12-09 09:12:17,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2018-12-09 09:12:17,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:12:17,737 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2018-12-09 09:12:17,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 09:12:17,737 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2018-12-09 09:12:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-09 09:12:17,738 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:12:17,738 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:12:17,738 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:12:17,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:12:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1752396196, now seen corresponding path program 2 times [2018-12-09 09:12:17,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:12:17,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:17,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:12:17,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:17,739 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:12:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:12:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 09:12:17,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:12:17,776 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:12:17,776 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:12:17,777 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:12:17,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:12:17,777 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/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 [2018-12-09 09:12:17,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 09:12:17,783 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 09:12:17,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 09:12:17,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:12:17,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:12:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-09 09:12:17,839 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:12:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-09 09:12:17,889 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 09:12:17,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [5] total 13 [2018-12-09 09:12:17,890 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:12:17,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 09:12:17,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 09:12:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-12-09 09:12:17,891 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2018-12-09 09:12:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:12:17,937 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2018-12-09 09:12:17,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 09:12:17,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2018-12-09 09:12:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:12:17,938 INFO L225 Difference]: With dead ends: 50 [2018-12-09 09:12:17,938 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 09:12:17,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-12-09 09:12:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 09:12:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-12-09 09:12:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-09 09:12:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2018-12-09 09:12:17,941 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 32 [2018-12-09 09:12:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:12:17,941 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2018-12-09 09:12:17,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 09:12:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2018-12-09 09:12:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 09:12:17,942 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:12:17,942 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:12:17,942 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:12:17,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:12:17,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1002288759, now seen corresponding path program 1 times [2018-12-09 09:12:17,943 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:12:17,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:17,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:12:17,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:17,943 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:12:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:12:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 09:12:17,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:12:17,970 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:12:17,970 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2018-12-09 09:12:17,970 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [23], [29], [31], [33], [37], [41], [46], [49], [55], [60], [63], [65], [72], [79], [91], [95], [98], [100], [106], [107], [108], [110] [2018-12-09 09:12:17,972 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 09:12:17,972 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 09:12:18,059 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 09:12:18,059 INFO L272 AbstractInterpreter]: Visited 29 different actions 93 times. Merged at 16 different actions 43 times. Widened at 2 different actions 2 times. Performed 510 root evaluator evaluations with a maximum evaluation depth of 6. Performed 510 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 6 different actions. Largest state had 28 variables. [2018-12-09 09:12:18,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:12:18,062 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 09:12:18,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:12:18,062 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/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 [2018-12-09 09:12:18,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:12:18,071 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:12:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:12:18,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:12:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 09:12:18,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:12:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 09:12:18,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:12:18,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-12-09 09:12:18,156 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:12:18,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 09:12:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 09:12:18,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:12:18,157 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2018-12-09 09:12:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:12:18,201 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2018-12-09 09:12:18,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 09:12:18,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-12-09 09:12:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:12:18,202 INFO L225 Difference]: With dead ends: 79 [2018-12-09 09:12:18,203 INFO L226 Difference]: Without dead ends: 54 [2018-12-09 09:12:18,203 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:12:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-09 09:12:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2018-12-09 09:12:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-09 09:12:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2018-12-09 09:12:18,207 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2018-12-09 09:12:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:12:18,208 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2018-12-09 09:12:18,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 09:12:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2018-12-09 09:12:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-09 09:12:18,208 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:12:18,209 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:12:18,209 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:12:18,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:12:18,209 INFO L82 PathProgramCache]: Analyzing trace with hash 515659703, now seen corresponding path program 2 times [2018-12-09 09:12:18,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:12:18,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:18,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:12:18,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:12:18,210 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:12:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:12:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-09 09:12:18,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:12:18,240 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:12:18,240 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:12:18,241 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:12:18,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:12:18,241 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/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 [2018-12-09 09:12:18,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 09:12:18,247 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 09:12:18,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 09:12:18,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:12:18,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:12:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-09 09:12:18,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:12:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-09 09:12:18,311 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 09:12:18,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-12-09 09:12:18,311 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:12:18,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 09:12:18,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 09:12:18,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-12-09 09:12:18,312 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 5 states. [2018-12-09 09:12:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:12:18,321 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2018-12-09 09:12:18,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 09:12:18,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2018-12-09 09:12:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:12:18,322 INFO L225 Difference]: With dead ends: 40 [2018-12-09 09:12:18,322 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 09:12:18,322 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-09 09:12:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 09:12:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 09:12:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 09:12:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 09:12:18,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2018-12-09 09:12:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:12:18,323 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 09:12:18,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 09:12:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 09:12:18,323 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 09:12:18,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 09:12:18,355 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-12-09 09:12:18,356 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-12-09 09:12:18,356 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 09:12:18,356 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 09:12:18,356 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 09:12:18,356 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 09:12:18,356 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 09:12:18,356 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 14 58) no Hoare annotation was computed. [2018-12-09 09:12:18,356 INFO L448 ceAbstractionStarter]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2018-12-09 09:12:18,356 INFO L444 ceAbstractionStarter]: At program point L23-3(lines 23 24) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2018-12-09 09:12:18,356 INFO L448 ceAbstractionStarter]: For program point L23-4(lines 23 24) no Hoare annotation was computed. [2018-12-09 09:12:18,356 INFO L448 ceAbstractionStarter]: For program point L19-2(lines 19 20) no Hoare annotation was computed. [2018-12-09 09:12:18,356 INFO L444 ceAbstractionStarter]: At program point L19-3(lines 19 20) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2018-12-09 09:12:18,356 INFO L448 ceAbstractionStarter]: For program point L19-4(lines 19 20) no Hoare annotation was computed. [2018-12-09 09:12:18,356 INFO L448 ceAbstractionStarter]: For program point L32-1(lines 32 33) no Hoare annotation was computed. [2018-12-09 09:12:18,357 INFO L444 ceAbstractionStarter]: At program point L32-3(lines 32 33) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2018-12-09 09:12:18,357 INFO L448 ceAbstractionStarter]: For program point L32-4(lines 15 58) no Hoare annotation was computed. [2018-12-09 09:12:18,357 INFO L448 ceAbstractionStarter]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2018-12-09 09:12:18,357 INFO L444 ceAbstractionStarter]: At program point L28-3(lines 28 29) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2018-12-09 09:12:18,357 INFO L448 ceAbstractionStarter]: For program point L28-4(lines 28 29) no Hoare annotation was computed. [2018-12-09 09:12:18,357 INFO L448 ceAbstractionStarter]: For program point L41(lines 41 50) no Hoare annotation was computed. [2018-12-09 09:12:18,357 INFO L444 ceAbstractionStarter]: At program point L41-2(lines 39 51) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0) (and (<= 0 main_~j~0) (<= main_~nc_B~0 0))) [2018-12-09 09:12:18,357 INFO L448 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-12-09 09:12:18,357 INFO L448 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-12-09 09:12:18,357 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 14 58) no Hoare annotation was computed. [2018-12-09 09:12:18,357 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 14 58) the Hoare annotation is: true [2018-12-09 09:12:18,357 INFO L444 ceAbstractionStarter]: At program point L55(line 55) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2018-12-09 09:12:18,357 INFO L448 ceAbstractionStarter]: For program point L55-1(line 55) no Hoare annotation was computed. [2018-12-09 09:12:18,357 INFO L448 ceAbstractionStarter]: For program point L39-2(lines 39 51) no Hoare annotation was computed. [2018-12-09 09:12:18,358 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2018-12-09 09:12:18,358 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2018-12-09 09:12:18,358 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2018-12-09 09:12:18,358 INFO L448 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2018-12-09 09:12:18,358 INFO L448 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2018-12-09 09:12:18,358 INFO L448 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2018-12-09 09:12:18,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:12:18 BoogieIcfgContainer [2018-12-09 09:12:18,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 09:12:18,366 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 09:12:18,366 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 09:12:18,366 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 09:12:18,366 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:12:17" (3/4) ... [2018-12-09 09:12:18,368 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 09:12:18,372 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 09:12:18,372 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 09:12:18,372 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-09 09:12:18,375 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2018-12-09 09:12:18,375 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2018-12-09 09:12:18,375 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-09 09:12:18,375 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 09:12:18,402 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d87c8b71-267c-4926-be80-d5722685514e/bin-2019/utaipan/witness.graphml [2018-12-09 09:12:18,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 09:12:18,403 INFO L168 Benchmark]: Toolchain (without parser) took 1667.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 962.4 MB in the beginning and 857.8 MB in the end (delta: 104.6 MB). Peak memory consumption was 225.7 MB. Max. memory is 11.5 GB. [2018-12-09 09:12:18,404 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:12:18,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 136.89 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 09:12:18,404 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.68 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 09:12:18,404 INFO L168 Benchmark]: Boogie Preprocessor took 50.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -166.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-12-09 09:12:18,405 INFO L168 Benchmark]: RCFGBuilder took 186.46 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: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2018-12-09 09:12:18,405 INFO L168 Benchmark]: TraceAbstraction took 1240.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 864.6 MB in the end (delta: 230.0 MB). Peak memory consumption was 230.0 MB. Max. memory is 11.5 GB. [2018-12-09 09:12:18,405 INFO L168 Benchmark]: Witness Printer took 36.61 ms. Allocated memory is still 1.2 GB. Free memory was 864.6 MB in the beginning and 857.8 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-09 09:12:18,406 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 136.89 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 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 13.68 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 50.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -166.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 186.46 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: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1240.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 864.6 MB in the end (delta: 230.0 MB). Peak memory consumption was 230.0 MB. Max. memory is 11.5 GB. * Witness Printer took 36.61 ms. Allocated memory is still 1.2 GB. Free memory was 864.6 MB in the beginning and 857.8 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (0 == found || 1 == found) || (0 <= j && nc_B <= 0) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 1 error locations. SAFE Result, 1.1s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 175 SDtfs, 61 SDslu, 311 SDs, 0 SdLazy, 142 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 30 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 17 PreInvPairs, 31 NumberOfFragments, 54 HoareAnnotationTreeSize, 17 FomulaSimplifications, 87 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 310 NumberOfCodeBlocks, 288 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 428 ConstructedInterpolants, 0 QuantifiedInterpolants, 17694 SizeOfPredicates, 14 NumberOfNonLiveVariables, 377 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 92/120 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...