./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8ec34260dbdf702968911eb4443c2b37192d60c9 ............................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8ec34260dbdf702968911eb4443c2b37192d60c9 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:07,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:07,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:07,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:07,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:07,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:07,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:07,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:07,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:07,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:07,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:07,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:07,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:07,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:07,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:07,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:07,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:07,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:07,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:07,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:07,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:07,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:07,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:07,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:07,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:07,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:07,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:07,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:07,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:07,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:07,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:07,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:07,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:07,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:07,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:07,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:07,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:07,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:07,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:07,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:07,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:07,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:21:07,988 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:07,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:07,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:07,989 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:07,989 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:07,990 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:07,990 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:21:07,990 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:07,990 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:07,990 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:21:07,990 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:21:07,991 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:07,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:07,991 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:07,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:21:07,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:07,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:07,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:21:07,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:07,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:21:07,993 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:07,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:21:07,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:21:07,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:07,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:07,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:07,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:07,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:07,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:07,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:07,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:21:07,995 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:21:07,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:21:07,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:21:07,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:07,996 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec34260dbdf702968911eb4443c2b37192d60c9 [2019-10-22 11:21:08,032 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:08,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:08,050 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:08,053 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:08,054 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:08,054 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2019-10-22 11:21:08,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/data/b714e0949/f895879c458b4bd3b81227d39801d08a/FLAG65b779029 [2019-10-22 11:21:08,520 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:08,520 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2019-10-22 11:21:08,526 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/data/b714e0949/f895879c458b4bd3b81227d39801d08a/FLAG65b779029 [2019-10-22 11:21:08,908 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/data/b714e0949/f895879c458b4bd3b81227d39801d08a [2019-10-22 11:21:08,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:08,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:08,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:08,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:08,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:08,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:08" (1/1) ... [2019-10-22 11:21:08,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d01eb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:08, skipping insertion in model container [2019-10-22 11:21:08,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:08" (1/1) ... [2019-10-22 11:21:08,928 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:08,942 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:09,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:09,071 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:09,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:09,153 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:09,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09 WrapperNode [2019-10-22 11:21:09,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:09,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:09,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:09,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:09,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (1/1) ... [2019-10-22 11:21:09,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (1/1) ... [2019-10-22 11:21:09,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:09,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:09,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:09,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:09,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (1/1) ... [2019-10-22 11:21:09,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (1/1) ... [2019-10-22 11:21:09,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (1/1) ... [2019-10-22 11:21:09,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (1/1) ... [2019-10-22 11:21:09,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (1/1) ... [2019-10-22 11:21:09,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (1/1) ... [2019-10-22 11:21:09,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (1/1) ... [2019-10-22 11:21:09,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:09,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:09,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:09,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:09,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:09,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:09,381 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:09,382 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-22 11:21:09,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:09 BoogieIcfgContainer [2019-10-22 11:21:09,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:09,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:09,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:09,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:09,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:08" (1/3) ... [2019-10-22 11:21:09,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cda6535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:09, skipping insertion in model container [2019-10-22 11:21:09,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:09" (2/3) ... [2019-10-22 11:21:09,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cda6535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:09, skipping insertion in model container [2019-10-22 11:21:09,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:09" (3/3) ... [2019-10-22 11:21:09,389 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2019-10-22 11:21:09,397 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:09,402 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:21:09,410 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:21:09,425 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:09,426 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:09,426 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:09,426 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:09,426 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:09,426 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:09,426 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:09,426 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:21:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:21:09,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:09,442 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:21:09,443 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:09,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash 29817909, now seen corresponding path program 1 times [2019-10-22 11:21:09,457 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:09,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743040472] [2019-10-22 11:21:09,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:09,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:09,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:09,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743040472] [2019-10-22 11:21:09,608 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:09,612 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:21:09,612 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486619064] [2019-10-22 11:21:09,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:09,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:09,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:09,645 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-10-22 11:21:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:09,678 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2019-10-22 11:21:09,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:09,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-10-22 11:21:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:09,690 INFO L225 Difference]: With dead ends: 24 [2019-10-22 11:21:09,690 INFO L226 Difference]: Without dead ends: 11 [2019-10-22 11:21:09,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-10-22 11:21:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2019-10-22 11:21:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 11:21:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-10-22 11:21:09,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-10-22 11:21:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:09,725 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-10-22 11:21:09,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-10-22 11:21:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:21:09,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:09,726 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:09,726 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash 728659877, now seen corresponding path program 1 times [2019-10-22 11:21:09,727 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:09,727 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684340646] [2019-10-22 11:21:09,727 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:09,727 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:09,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:09,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684340646] [2019-10-22 11:21:09,788 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:09,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:21:09,789 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134745045] [2019-10-22 11:21:09,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:09,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:09,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:09,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:09,791 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2019-10-22 11:21:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:09,814 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2019-10-22 11:21:09,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:09,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-10-22 11:21:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:09,815 INFO L225 Difference]: With dead ends: 17 [2019-10-22 11:21:09,815 INFO L226 Difference]: Without dead ends: 10 [2019-10-22 11:21:09,816 INFO L600 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 [2019-10-22 11:21:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-10-22 11:21:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-10-22 11:21:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-10-22 11:21:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-10-22 11:21:09,819 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-10-22 11:21:09,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:09,820 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-10-22 11:21:09,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-10-22 11:21:09,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:21:09,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:09,821 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:09,821 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:09,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:09,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1564831260, now seen corresponding path program 1 times [2019-10-22 11:21:09,821 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:09,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299816205] [2019-10-22 11:21:09,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:09,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:09,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:09,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299816205] [2019-10-22 11:21:09,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491400310] [2019-10-22 11:21:09,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:09,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:21:09,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:09,976 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:21:10,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1256119382] [2019-10-22 11:21:10,023 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 10 [2019-10-22 11:21:10,062 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:21:10,063 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:21:10,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:10,352 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:21:10,356 INFO L168 Benchmark]: Toolchain (without parser) took 1443.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.0 MB in the beginning and 1.1 GB in the end (delta: -117.9 MB). Peak memory consumption was 21.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:10,357 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 963.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:10,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.0 MB in the beginning and 1.1 GB in the end (delta: -191.8 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:10,358 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.06 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:10,358 INFO L168 Benchmark]: Boogie Preprocessor took 18.58 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:10,359 INFO L168 Benchmark]: RCFGBuilder took 187.36 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:10,360 INFO L168 Benchmark]: TraceAbstraction took 970.59 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:10,367 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 963.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 240.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.0 MB in the beginning and 1.1 GB in the end (delta: -191.8 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.06 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.58 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 187.36 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 970.59 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:12,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:12,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:12,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:12,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:12,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:12,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:12,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:12,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:12,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:12,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:12,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:12,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:12,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:12,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:12,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:12,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:12,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:12,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:12,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:12,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:12,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:12,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:12,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:12,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:12,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:12,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:12,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:12,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:12,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:12,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:12,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:12,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:12,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:12,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:12,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:12,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:12,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:12,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:12,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:12,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:12,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:21:12,494 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:12,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:12,495 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:12,495 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:12,495 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:12,495 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:12,496 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:12,496 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:12,496 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:12,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:12,497 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:12,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:12,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:12,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:21:12,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:12,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:21:12,498 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:21:12,498 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:21:12,498 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:12,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:21:12,498 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:21:12,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:21:12,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:12,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:12,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:12,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:12,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:12,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:12,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:12,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:21:12,500 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:21:12,500 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:21:12,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:21:12,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:12,500 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec34260dbdf702968911eb4443c2b37192d60c9 [2019-10-22 11:21:12,528 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:12,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:12,540 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:12,541 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:12,542 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:12,542 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2019-10-22 11:21:12,586 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/data/ad3a9f95d/565c9971cdd44594a02de847306293a3/FLAG5227d6fc6 [2019-10-22 11:21:12,968 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:12,969 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2019-10-22 11:21:12,972 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/data/ad3a9f95d/565c9971cdd44594a02de847306293a3/FLAG5227d6fc6 [2019-10-22 11:21:12,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/data/ad3a9f95d/565c9971cdd44594a02de847306293a3 [2019-10-22 11:21:12,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:12,985 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:12,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:12,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:12,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:12,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:12" (1/1) ... [2019-10-22 11:21:12,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce291e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:12, skipping insertion in model container [2019-10-22 11:21:12,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:12" (1/1) ... [2019-10-22 11:21:12,999 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:13,014 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:13,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:13,186 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:13,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:13,212 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:13,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13 WrapperNode [2019-10-22 11:21:13,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:13,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:13,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:13,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:13,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:13,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:13,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:13,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:13,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:13,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:13,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:13,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:13,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:13,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:13,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:13,504 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:13,504 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-22 11:21:13,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:13 BoogieIcfgContainer [2019-10-22 11:21:13,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:13,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:13,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:13,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:13,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:12" (1/3) ... [2019-10-22 11:21:13,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba82823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:13, skipping insertion in model container [2019-10-22 11:21:13,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (2/3) ... [2019-10-22 11:21:13,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba82823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:13, skipping insertion in model container [2019-10-22 11:21:13,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:13" (3/3) ... [2019-10-22 11:21:13,512 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2019-10-22 11:21:13,520 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:13,525 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:21:13,533 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:21:13,550 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:13,550 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:13,550 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:13,550 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:13,550 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:13,551 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:13,551 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:13,551 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:21:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:21:13,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:13,567 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:21:13,569 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:13,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:13,573 INFO L82 PathProgramCache]: Analyzing trace with hash 29817909, now seen corresponding path program 1 times [2019-10-22 11:21:13,580 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:13,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [492668229] [2019-10-22 11:21:13,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:13,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 11:21:13,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:13,666 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:13,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [492668229] [2019-10-22 11:21:13,678 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:13,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-10-22 11:21:13,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648900986] [2019-10-22 11:21:13,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:21:13,683 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:21:13,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:13,698 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2019-10-22 11:21:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:13,743 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2019-10-22 11:21:13,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:21:13,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 11:21:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:13,751 INFO L225 Difference]: With dead ends: 25 [2019-10-22 11:21:13,751 INFO L226 Difference]: Without dead ends: 12 [2019-10-22 11:21:13,754 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-22 11:21:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-22 11:21:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 11:21:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-10-22 11:21:13,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2019-10-22 11:21:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:13,785 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-10-22 11:21:13,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:21:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-10-22 11:21:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:21:13,786 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:13,786 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2019-10-22 11:21:13,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:13,987 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:13,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2071722443, now seen corresponding path program 1 times [2019-10-22 11:21:13,988 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:13,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1812282945] [2019-10-22 11:21:13,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:14,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 11:21:14,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:21:14,035 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:21:14,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1812282945] [2019-10-22 11:21:14,047 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:14,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 11:21:14,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054882121] [2019-10-22 11:21:14,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:21:14,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:21:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:14,049 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2019-10-22 11:21:14,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:14,068 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2019-10-22 11:21:14,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:21:14,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-22 11:21:14,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:14,070 INFO L225 Difference]: With dead ends: 25 [2019-10-22 11:21:14,070 INFO L226 Difference]: Without dead ends: 16 [2019-10-22 11:21:14,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-22 11:21:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-22 11:21:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-22 11:21:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-22 11:21:14,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-10-22 11:21:14,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:14,075 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-22 11:21:14,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:21:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-22 11:21:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 11:21:14,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:14,076 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1] [2019-10-22 11:21:14,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:14,278 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:14,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1249079755, now seen corresponding path program 1 times [2019-10-22 11:21:14,279 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:14,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1272113417] [2019-10-22 11:21:14,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:14,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:21:14,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:21:14,368 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:21:14,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1272113417] [2019-10-22 11:21:14,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199645871] [2019-10-22 11:21:14,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:14,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:21:14,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:21:14,514 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:21:14,614 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:14,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5] total 10 [2019-10-22 11:21:14,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095514291] [2019-10-22 11:21:14,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 11:21:14,615 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:14,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 11:21:14,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:21:14,616 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2019-10-22 11:21:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:14,791 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2019-10-22 11:21:14,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 11:21:14,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-10-22 11:21:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:14,793 INFO L225 Difference]: With dead ends: 35 [2019-10-22 11:21:14,793 INFO L226 Difference]: Without dead ends: 24 [2019-10-22 11:21:14,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-22 11:21:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-22 11:21:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-22 11:21:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 11:21:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-22 11:21:14,801 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2019-10-22 11:21:14,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:14,801 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-22 11:21:14,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 11:21:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-22 11:21:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 11:21:14,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:14,804 INFO L380 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1] [2019-10-22 11:21:15,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:15,206 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1393978933, now seen corresponding path program 2 times [2019-10-22 11:21:15,207 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:15,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [801656885] [2019-10-22 11:21:15,208 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:15,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:15,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:15,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:21:15,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-22 11:21:15,384 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-22 11:21:15,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [801656885] [2019-10-22 11:21:15,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712502658] [2019-10-22 11:21:15,577 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:15,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:15,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:15,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:21:15,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-22 11:21:15,762 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-22 11:21:15,944 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-22 11:21:15,944 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 9, 4] total 23 [2019-10-22 11:21:15,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556605788] [2019-10-22 11:21:15,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:21:15,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:21:15,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2019-10-22 11:21:15,948 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2019-10-22 11:21:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:16,056 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-10-22 11:21:16,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:21:16,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-22 11:21:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:16,056 INFO L225 Difference]: With dead ends: 24 [2019-10-22 11:21:16,057 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 11:21:16,057 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2019-10-22 11:21:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 11:21:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 11:21:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 11:21:16,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 11:21:16,058 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2019-10-22 11:21:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:16,059 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 11:21:16,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:21:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 11:21:16,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 11:21:16,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:16,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 11:21:16,728 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 11:21:16,728 INFO L439 ceAbstractionStarter]: At program point L17-2(lines 17 19) the Hoare annotation is: (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32)) [2019-10-22 11:21:16,728 INFO L443 ceAbstractionStarter]: For program point L17-3(lines 17 19) no Hoare annotation was computed. [2019-10-22 11:21:16,728 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 11:21:16,729 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 11:21:16,729 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 11:21:16,729 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-22 11:21:16,729 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 22) the Hoare annotation is: (let ((.cse0 (bvult (bvadd ULTIMATE.start_main_~y~0 (_ bv1 32)) (_ bv10 32)))) (and (or (not (= (bvurem ULTIMATE.start_main_~x~0 (_ bv2 32)) (_ bv0 32))) (bvult ULTIMATE.start_main_~x~0 (_ bv268435455 32))) (or (not .cse0) (bvult (bvadd ULTIMATE.start_main_~y~0 (_ bv2 32)) (_ bv10 32))) (or .cse0 (not (bvult ULTIMATE.start_main_~y~0 (_ bv10 32)))))) [2019-10-22 11:21:16,729 INFO L443 ceAbstractionStarter]: For program point L14-3(lines 14 22) no Hoare annotation was computed. [2019-10-22 11:21:16,729 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-22 11:21:16,729 INFO L446 ceAbstractionStarter]: At program point L4-2(lines 1 25) the Hoare annotation is: true [2019-10-22 11:21:16,733 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvult32 [2019-10-22 11:21:16,734 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvult32 [2019-10-22 11:21:16,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:21:16 BoogieIcfgContainer [2019-10-22 11:21:16,743 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:21:16,744 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:21:16,744 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:21:16,744 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:21:16,745 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:13" (3/4) ... [2019-10-22 11:21:16,748 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 11:21:16,757 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-10-22 11:21:16,757 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 11:21:16,790 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e33b5b4f-1a78-4fea-bc33-de8fa5cfef58/bin/utaipan/witness.graphml [2019-10-22 11:21:16,790 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:21:16,792 INFO L168 Benchmark]: Toolchain (without parser) took 3807.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 949.7 MB in the beginning and 951.2 MB in the end (delta: -1.5 MB). Peak memory consumption was 161.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:16,793 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:16,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.99 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 938.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:16,794 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 938.9 MB in the beginning and 1.2 GB in the end (delta: -219.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:16,794 INFO L168 Benchmark]: Boogie Preprocessor took 17.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:16,795 INFO L168 Benchmark]: RCFGBuilder took 186.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:16,795 INFO L168 Benchmark]: TraceAbstraction took 3236.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 951.2 MB in the end (delta: 188.8 MB). Peak memory consumption was 188.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:16,796 INFO L168 Benchmark]: Witness Printer took 46.74 ms. Allocated memory is still 1.2 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:16,798 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 226.99 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 938.9 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 88.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 938.9 MB in the beginning and 1.2 GB in the end (delta: -219.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 186.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3236.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 951.2 MB in the end (delta: 188.8 MB). Peak memory consumption was 188.8 MB. Max. memory is 11.5 GB. * Witness Printer took 46.74 ms. Allocated memory is still 1.2 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation cannot identify Boogie2SMT function ~bvult32 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation cannot identify Boogie2SMT function ~bvult32 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant [2019-10-22 11:21:16,804 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvult32 [2019-10-22 11:21:16,804 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvult32 Derived loop invariant: NULL - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((!(~bvurem32(x, 2bv32) == 0bv32) || ~bvult32(x, 268435455bv32)) && (!~bvult32(~bvadd64(y, 1bv32), 10bv32) || ~bvult32(~bvadd64(y, 2bv32), 10bv32))) && (~bvult32(~bvadd64(y, 1bv32), 10bv32) || !~bvult32(y, 10bv32)) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: SAFE, OverallTime: 3.1s, OverallIterations: 4, TraceHistogramMax: 12, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 29 SDtfs, 22 SDslu, 47 SDs, 0 SdLazy, 49 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 21 NumberOfFragments, 37 HoareAnnotationTreeSize, 3 FomulaSimplifications, 221 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 303 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 172 ConstructedInterpolants, 0 QuantifiedInterpolants, 8146 SizeOfPredicates, 5 NumberOfNonLiveVariables, 158 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 359/466 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...