./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 871be16186d4378aec884efd2352a47ca4eb57bc ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 19:16:18,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:16:18,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:16:18,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:16:18,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:16:18,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:16:18,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:16:18,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:16:18,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:16:18,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:16:18,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:16:18,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:16:18,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:16:18,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:16:18,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:16:18,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:16:18,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:16:18,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:16:18,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:16:18,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:16:18,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:16:18,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:16:18,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:16:18,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:16:18,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:16:18,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:16:18,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:16:18,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:16:18,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:16:18,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:16:18,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:16:18,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:16:18,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:16:18,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:16:18,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:16:18,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:16:18,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:16:18,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:16:18,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:16:18,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:16:18,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:16:18,893 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-12-07 19:16:18,906 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:16:18,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:16:18,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:16:18,907 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:16:18,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:16:18,907 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:16:18,907 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 19:16:18,908 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:16:18,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:16:18,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 19:16:18,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 19:16:18,908 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:16:18,908 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 19:16:18,909 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 19:16:18,909 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 19:16:18,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:16:18,910 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 19:16:18,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 19:16:18,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:16:18,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:16:18,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:16:18,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:16:18,911 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 19:16:18,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:16:18,911 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:16:18,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:16:18,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:16:18,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:16:18,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:16:18,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:16:18,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:16:18,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:16:18,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:16:18,912 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 19:16:18,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 19:16:18,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:16:18,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:16:18,913 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:16:18,913 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/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 ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 871be16186d4378aec884efd2352a47ca4eb57bc [2019-12-07 19:16:19,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:16:19,031 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:16:19,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:16:19,034 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:16:19,034 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:16:19,035 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2019-12-07 19:16:19,073 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/data/e43acf7df/6d0172ff97444ec6b097396b9cc0c1f4/FLAGebf287bf3 [2019-12-07 19:16:19,433 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:16:19,434 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2019-12-07 19:16:19,438 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/data/e43acf7df/6d0172ff97444ec6b097396b9cc0c1f4/FLAGebf287bf3 [2019-12-07 19:16:19,447 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/data/e43acf7df/6d0172ff97444ec6b097396b9cc0c1f4 [2019-12-07 19:16:19,449 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:16:19,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:16:19,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:16:19,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:16:19,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:16:19,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f50cffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19, skipping insertion in model container [2019-12-07 19:16:19,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:16:19,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:16:19,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:16:19,563 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:16:19,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:16:19,614 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:16:19,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19 WrapperNode [2019-12-07 19:16:19,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:16:19,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:16:19,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:16:19,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:16:19,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:16:19,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:16:19,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:16:19,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:16:19,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (1/1) ... [2019-12-07 19:16:19,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:16:19,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:16:19,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:16:19,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:16:19,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:16:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:16:19,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:16:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2019-12-07 19:16:19,687 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2019-12-07 19:16:19,792 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:16:19,792 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 19:16:19,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:16:19 BoogieIcfgContainer [2019-12-07 19:16:19,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:16:19,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:16:19,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:16:19,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:16:19,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:16:19" (1/3) ... [2019-12-07 19:16:19,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77209129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:16:19, skipping insertion in model container [2019-12-07 19:16:19,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:16:19" (2/3) ... [2019-12-07 19:16:19,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77209129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:16:19, skipping insertion in model container [2019-12-07 19:16:19,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:16:19" (3/3) ... [2019-12-07 19:16:19,800 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91_Recursion.c [2019-12-07 19:16:19,806 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:16:19,810 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-12-07 19:16:19,817 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-12-07 19:16:19,831 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:16:19,831 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:16:19,832 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:16:19,832 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:16:19,832 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:16:19,832 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:16:19,832 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:16:19,832 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:16:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-12-07 19:16:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 19:16:19,846 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:19,846 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 19:16:19,847 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:16:19,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:19,850 INFO L82 PathProgramCache]: Analyzing trace with hash 30304495, now seen corresponding path program 1 times [2019-12-07 19:16:19,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:19,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758514611] [2019-12-07 19:16:19,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:16:19,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758514611] [2019-12-07 19:16:19,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:16:19,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 19:16:19,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286658914] [2019-12-07 19:16:19,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 19:16:19,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:19,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 19:16:19,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:16:19,979 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-12-07 19:16:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:20,054 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-12-07 19:16:20,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 19:16:20,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-12-07 19:16:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:20,064 INFO L225 Difference]: With dead ends: 38 [2019-12-07 19:16:20,064 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 19:16:20,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 19:16:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 19:16:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-12-07 19:16:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 19:16:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-12-07 19:16:20,096 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 5 [2019-12-07 19:16:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:20,096 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-12-07 19:16:20,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 19:16:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-12-07 19:16:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 19:16:20,097 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:20,097 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 19:16:20,097 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:16:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:20,097 INFO L82 PathProgramCache]: Analyzing trace with hash 30304655, now seen corresponding path program 1 times [2019-12-07 19:16:20,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:20,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998508290] [2019-12-07 19:16:20,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:16:20,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998508290] [2019-12-07 19:16:20,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:16:20,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 19:16:20,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082211905] [2019-12-07 19:16:20,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 19:16:20,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:20,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 19:16:20,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 19:16:20,111 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2019-12-07 19:16:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:20,131 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2019-12-07 19:16:20,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 19:16:20,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 19:16:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:20,132 INFO L225 Difference]: With dead ends: 29 [2019-12-07 19:16:20,132 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 19:16:20,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 19:16:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 19:16:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-12-07 19:16:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 19:16:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-12-07 19:16:20,138 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 5 [2019-12-07 19:16:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:20,138 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-12-07 19:16:20,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 19:16:20,139 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-12-07 19:16:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 19:16:20,139 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:20,139 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 19:16:20,139 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:16:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:20,139 INFO L82 PathProgramCache]: Analyzing trace with hash 939439389, now seen corresponding path program 1 times [2019-12-07 19:16:20,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:20,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157046209] [2019-12-07 19:16:20,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:16:20,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157046209] [2019-12-07 19:16:20,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:16:20,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 19:16:20,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411252122] [2019-12-07 19:16:20,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 19:16:20,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:20,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 19:16:20,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 19:16:20,152 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 3 states. [2019-12-07 19:16:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:20,162 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2019-12-07 19:16:20,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 19:16:20,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 19:16:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:20,163 INFO L225 Difference]: With dead ends: 28 [2019-12-07 19:16:20,163 INFO L226 Difference]: Without dead ends: 25 [2019-12-07 19:16:20,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 19:16:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-12-07 19:16:20,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-12-07 19:16:20,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 19:16:20,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-12-07 19:16:20,168 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 6 [2019-12-07 19:16:20,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:20,168 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-12-07 19:16:20,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 19:16:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-12-07 19:16:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 19:16:20,168 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:20,168 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 19:16:20,169 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:16:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:20,169 INFO L82 PathProgramCache]: Analyzing trace with hash 939444354, now seen corresponding path program 1 times [2019-12-07 19:16:20,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:20,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791815590] [2019-12-07 19:16:20,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:16:20,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791815590] [2019-12-07 19:16:20,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:16:20,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 19:16:20,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038174200] [2019-12-07 19:16:20,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 19:16:20,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:20,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 19:16:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:16:20,191 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-12-07 19:16:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:20,230 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2019-12-07 19:16:20,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 19:16:20,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-12-07 19:16:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:20,231 INFO L225 Difference]: With dead ends: 39 [2019-12-07 19:16:20,231 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 19:16:20,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 19:16:20,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 19:16:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-12-07 19:16:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 19:16:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-12-07 19:16:20,238 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 6 [2019-12-07 19:16:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:20,238 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-12-07 19:16:20,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 19:16:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-12-07 19:16:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 19:16:20,239 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:20,239 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:16:20,239 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:16:20,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash 312291472, now seen corresponding path program 1 times [2019-12-07 19:16:20,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:20,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074826006] [2019-12-07 19:16:20,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:16:20,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074826006] [2019-12-07 19:16:20,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:16:20,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 19:16:20,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235918041] [2019-12-07 19:16:20,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 19:16:20,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:20,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 19:16:20,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:16:20,261 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2019-12-07 19:16:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:20,307 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-12-07 19:16:20,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 19:16:20,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 19:16:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:20,308 INFO L225 Difference]: With dead ends: 55 [2019-12-07 19:16:20,308 INFO L226 Difference]: Without dead ends: 54 [2019-12-07 19:16:20,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-07 19:16:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-07 19:16:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-12-07 19:16:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 19:16:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-12-07 19:16:20,316 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 10 [2019-12-07 19:16:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:20,316 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-12-07 19:16:20,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 19:16:20,316 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-12-07 19:16:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 19:16:20,317 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:20,317 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:16:20,317 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:16:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:20,317 INFO L82 PathProgramCache]: Analyzing trace with hash -904725729, now seen corresponding path program 1 times [2019-12-07 19:16:20,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:20,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711346698] [2019-12-07 19:16:20,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 19:16:20,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711346698] [2019-12-07 19:16:20,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606360553] [2019-12-07 19:16:20,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:16:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:20,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 19:16:20,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:16:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:16:20,461 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:16:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:16:20,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673955415] [2019-12-07 19:16:20,609 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-12-07 19:16:20,609 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 19:16:20,613 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) 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.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) 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.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) 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) [2019-12-07 19:16:20,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 19:16:20,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2019-12-07 19:16:20,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099485019] [2019-12-07 19:16:20,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 19:16:20,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 19:16:20,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2019-12-07 19:16:20,616 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 22 states. [2019-12-07 19:16:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:21,062 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2019-12-07 19:16:21,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 19:16:21,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 18 [2019-12-07 19:16:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:21,064 INFO L225 Difference]: With dead ends: 83 [2019-12-07 19:16:21,064 INFO L226 Difference]: Without dead ends: 82 [2019-12-07 19:16:21,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 19:16:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-07 19:16:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2019-12-07 19:16:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 19:16:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2019-12-07 19:16:21,074 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2019-12-07 19:16:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:21,074 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2019-12-07 19:16:21,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 19:16:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2019-12-07 19:16:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 19:16:21,075 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:21,075 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:16:21,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 19:16:21,276 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:16:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:21,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2018278482, now seen corresponding path program 1 times [2019-12-07 19:16:21,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:21,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216806453] [2019-12-07 19:16:21,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 19:16:21,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216806453] [2019-12-07 19:16:21,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:16:21,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 19:16:21,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196176376] [2019-12-07 19:16:21,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 19:16:21,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:21,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 19:16:21,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-12-07 19:16:21,339 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2019-12-07 19:16:21,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:21,429 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2019-12-07 19:16:21,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 19:16:21,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-12-07 19:16:21,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:21,431 INFO L225 Difference]: With dead ends: 98 [2019-12-07 19:16:21,431 INFO L226 Difference]: Without dead ends: 97 [2019-12-07 19:16:21,432 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-07 19:16:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-07 19:16:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2019-12-07 19:16:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-07 19:16:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2019-12-07 19:16:21,444 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 19 [2019-12-07 19:16:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:21,445 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2019-12-07 19:16:21,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 19:16:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2019-12-07 19:16:21,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 19:16:21,446 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:16:21,446 INFO L410 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 19:16:21,447 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 19:16:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:16:21,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1310326519, now seen corresponding path program 1 times [2019-12-07 19:16:21,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:16:21,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842965566] [2019-12-07 19:16:21,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:16:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:16:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-12-07 19:16:21,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842965566] [2019-12-07 19:16:21,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:16:21,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 19:16:21,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7139613] [2019-12-07 19:16:21,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 19:16:21,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:16:21,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 19:16:21,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-12-07 19:16:21,503 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand 8 states. [2019-12-07 19:16:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:16:21,595 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2019-12-07 19:16:21,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 19:16:21,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2019-12-07 19:16:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:16:21,596 INFO L225 Difference]: With dead ends: 92 [2019-12-07 19:16:21,596 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 19:16:21,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-07 19:16:21,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 19:16:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 19:16:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 19:16:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 19:16:21,598 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-12-07 19:16:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:16:21,599 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 19:16:21,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 19:16:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 19:16:21,599 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 19:16:21,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 19:16:21,858 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 19:16:21,858 INFO L242 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648))) [2019-12-07 19:16:21,858 INFO L246 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2019-12-07 19:16:21,859 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 19:16:21,859 INFO L246 CegarLoopResult]: For program point mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 11) no Hoare annotation was computed. [2019-12-07 19:16:21,859 INFO L246 CegarLoopResult]: For program point mc91FINAL(lines 8 12) no Hoare annotation was computed. [2019-12-07 19:16:21,859 INFO L246 CegarLoopResult]: For program point mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 11) no Hoare annotation was computed. [2019-12-07 19:16:21,859 INFO L246 CegarLoopResult]: For program point mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2019-12-07 19:16:21,859 INFO L246 CegarLoopResult]: For program point mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2019-12-07 19:16:21,859 INFO L246 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2019-12-07 19:16:21,859 INFO L246 CegarLoopResult]: For program point L10(lines 10 11) no Hoare annotation was computed. [2019-12-07 19:16:21,859 INFO L246 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-12-07 19:16:21,859 INFO L246 CegarLoopResult]: For program point L10-1(line 10) no Hoare annotation was computed. [2019-12-07 19:16:21,860 INFO L242 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (and (or (and (<= mc91_~n 100) (<= 91 mc91_~n)) (not (<= |mc91_#in~n| 2147483648)) (not (<= 91 |mc91_#in~n|))) (or (and (<= mc91_~n |mc91_#in~n|) (<= 0 (+ mc91_~n 2147483648))) (not (<= |mc91_#in~n| 111)) (not (<= 0 (+ |mc91_#in~n| 2147483648))))) [2019-12-07 19:16:21,860 INFO L246 CegarLoopResult]: For program point L10-2(line 10) no Hoare annotation was computed. [2019-12-07 19:16:21,860 INFO L246 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2019-12-07 19:16:21,860 INFO L242 CegarLoopResult]: At program point L11-4(line 11) the Hoare annotation is: (let ((.cse0 (<= |mc91_#t~ret0| 2147483648)) (.cse1 (<= 91 |mc91_#t~ret0|))) (and (or (and .cse0 (<= mc91_~n |mc91_#in~n|) .cse1 (<= 0 (+ mc91_~n 2147483648))) (not (<= |mc91_#in~n| 111)) (not (<= 0 (+ |mc91_#in~n| 2147483648)))) (or (and .cse0 (<= mc91_~n 100) .cse1 (<= 91 mc91_~n)) (not (<= |mc91_#in~n| 2147483648)) (not (<= 91 |mc91_#in~n|))))) [2019-12-07 19:16:21,860 INFO L249 CegarLoopResult]: At program point mc91ENTRY(lines 8 12) the Hoare annotation is: true [2019-12-07 19:16:21,860 INFO L246 CegarLoopResult]: For program point L11-5(line 11) no Hoare annotation was computed. [2019-12-07 19:16:21,860 INFO L246 CegarLoopResult]: For program point mc91EXIT(lines 8 12) no Hoare annotation was computed. [2019-12-07 19:16:21,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:16:21 BoogieIcfgContainer [2019-12-07 19:16:21,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:16:21,864 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:16:21,864 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:16:21,864 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:16:21,865 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:16:19" (3/4) ... [2019-12-07 19:16:21,867 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 19:16:21,871 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure mc91 [2019-12-07 19:16:21,874 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-12-07 19:16:21,874 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 19:16:21,875 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 19:16:21,901 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_58d88e10-0be0-4594-a672-502692d79b10/bin/utaipan/witness.graphml [2019-12-07 19:16:21,902 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:16:21,903 INFO L168 Benchmark]: Toolchain (without parser) took 2452.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 939.3 MB in the beginning and 1.0 GB in the end (delta: -61.8 MB). Peak memory consumption was 57.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:16:21,903 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:16:21,904 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -173.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 19:16:21,904 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.15 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:16:21,904 INFO L168 Benchmark]: Boogie Preprocessor took 10.59 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:16:21,904 INFO L168 Benchmark]: RCFGBuilder took 146.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-12-07 19:16:21,905 INFO L168 Benchmark]: TraceAbstraction took 2069.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 93.2 MB). Peak memory consumption was 93.2 MB. Max. memory is 11.5 GB. [2019-12-07 19:16:21,905 INFO L168 Benchmark]: Witness Printer took 37.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:16:21,906 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 164.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -173.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.15 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.59 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 146.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2069.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 93.2 MB). Peak memory consumption was 93.2 MB. Max. memory is 11.5 GB. * Witness Printer took 37.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 11]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 11]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 10]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 4 error locations. Result: SAFE, OverallTime: 1.7s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 124 SDtfs, 260 SDslu, 234 SDs, 0 SdLazy, 530 SolverSat, 170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=7, 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, 8 MinimizatonAttempts, 64 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 58 PreInvPairs, 58 NumberOfFragments, 96 HoareAnnotationTreeSize, 58 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 371 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 140 ConstructedInterpolants, 0 QuantifiedInterpolants, 7068 SizeOfPredicates, 4 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 97/109 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...