./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/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 0.2.0-a4ecdab [2020-11-22 13:05:08,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:05:08,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:05:08,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:05:08,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:05:08,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:05:08,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:05:08,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:05:08,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:05:08,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:05:08,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:05:08,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:05:08,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:05:08,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:05:08,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:05:08,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:05:08,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:05:08,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:05:08,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:05:08,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:05:08,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:05:08,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:05:08,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:05:08,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:05:08,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:05:08,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:05:08,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:05:08,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:05:08,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:05:08,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:05:08,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:05:08,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:05:08,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:05:08,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:05:08,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:05:08,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:05:08,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:05:08,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:05:08,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:05:08,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:05:08,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:05:08,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-22 13:05:08,698 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:05:08,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:05:08,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:05:08,708 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:05:08,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:05:08,708 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:05:08,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:05:08,709 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:05:08,709 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:05:08,709 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:05:08,710 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:05:08,710 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:05:08,711 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:05:08,711 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:05:08,711 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:05:08,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:05:08,712 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:05:08,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:05:08,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:05:08,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:05:08,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:05:08,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:05:08,713 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-22 13:05:08,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:05:08,714 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:05:08,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:05:08,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:05:08,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:05:08,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:05:08,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:08,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:05:08,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:05:08,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:05:08,716 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:05:08,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:05:08,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:05:08,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:05:08,716 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:05:08,716 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 871be16186d4378aec884efd2352a47ca4eb57bc [2020-11-22 13:05:08,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:05:09,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:05:09,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:05:09,029 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:05:09,031 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:05:09,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2020-11-22 13:05:09,101 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/data/540b48c02/2806e08e85f048bb903b0c329e688dd8/FLAGc9f2f1aa1 [2020-11-22 13:05:09,588 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:05:09,589 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2020-11-22 13:05:09,609 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/data/540b48c02/2806e08e85f048bb903b0c329e688dd8/FLAGc9f2f1aa1 [2020-11-22 13:05:10,091 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/data/540b48c02/2806e08e85f048bb903b0c329e688dd8 [2020-11-22 13:05:10,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:05:10,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:05:10,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:10,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:05:10,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:05:10,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea2d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10, skipping insertion in model container [2020-11-22 13:05:10,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:05:10,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:05:10,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:10,241 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:05:10,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:10,267 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:05:10,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10 WrapperNode [2020-11-22 13:05:10,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:10,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:10,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:05:10,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:05:10,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,310 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:10,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:05:10,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:05:10,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:05:10,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (1/1) ... [2020-11-22 13:05:10,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:05:10,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:05:10,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:05:10,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:05:10,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/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 [2020-11-22 13:05:10,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:05:10,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:05:10,408 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2020-11-22 13:05:10,409 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2020-11-22 13:05:10,597 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:05:10,597 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-22 13:05:10,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:10 BoogieIcfgContainer [2020-11-22 13:05:10,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:05:10,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:05:10,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:05:10,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:05:10,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:05:10" (1/3) ... [2020-11-22 13:05:10,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b28e094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:10, skipping insertion in model container [2020-11-22 13:05:10,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:10" (2/3) ... [2020-11-22 13:05:10,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b28e094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:10, skipping insertion in model container [2020-11-22 13:05:10,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:10" (3/3) ... [2020-11-22 13:05:10,620 INFO L111 eAbstractionObserver]: Analyzing ICFG McCarthy91_Recursion.c [2020-11-22 13:05:10,637 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:05:10,641 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-22 13:05:10,652 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 13:05:10,678 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:05:10,678 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:05:10,678 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:05:10,678 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:05:10,678 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:05:10,679 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:05:10,679 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:05:10,679 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:05:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-22 13:05:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:05:10,698 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:10,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:05:10,699 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:10,705 INFO L82 PathProgramCache]: Analyzing trace with hash 30304495, now seen corresponding path program 1 times [2020-11-22 13:05:10,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:10,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357795461] [2020-11-22 13:05:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:10,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357795461] [2020-11-22 13:05:10,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:10,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:10,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904043236] [2020-11-22 13:05:10,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:05:10,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:05:10,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:05:10,943 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-11-22 13:05:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:11,074 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-11-22 13:05:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:05:11,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-22 13:05:11,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:11,088 INFO L225 Difference]: With dead ends: 38 [2020-11-22 13:05:11,088 INFO L226 Difference]: Without dead ends: 32 [2020-11-22 13:05:11,091 INFO L677 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 [2020-11-22 13:05:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-22 13:05:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-11-22 13:05:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-22 13:05:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-11-22 13:05:11,152 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 5 [2020-11-22 13:05:11,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:11,152 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-11-22 13:05:11,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:05:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-11-22 13:05:11,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:05:11,153 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:11,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:05:11,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:05:11,154 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:11,158 INFO L82 PathProgramCache]: Analyzing trace with hash 30304655, now seen corresponding path program 1 times [2020-11-22 13:05:11,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:11,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911155048] [2020-11-22 13:05:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911155048] [2020-11-22 13:05:11,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:11,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:11,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146640469] [2020-11-22 13:05:11,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:11,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:11,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:11,197 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2020-11-22 13:05:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:11,237 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-11-22 13:05:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:11,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 13:05:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:11,241 INFO L225 Difference]: With dead ends: 29 [2020-11-22 13:05:11,241 INFO L226 Difference]: Without dead ends: 28 [2020-11-22 13:05:11,242 INFO L677 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 [2020-11-22 13:05:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-22 13:05:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-11-22 13:05:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-22 13:05:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-11-22 13:05:11,251 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 5 [2020-11-22 13:05:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:11,251 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-11-22 13:05:11,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:11,251 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-11-22 13:05:11,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:05:11,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:11,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:05:11,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:05:11,252 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:11,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:11,253 INFO L82 PathProgramCache]: Analyzing trace with hash 939439389, now seen corresponding path program 1 times [2020-11-22 13:05:11,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:11,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457666390] [2020-11-22 13:05:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:11,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457666390] [2020-11-22 13:05:11,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:11,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:05:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908198950] [2020-11-22 13:05:11,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:05:11,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:11,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:05:11,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:05:11,287 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 3 states. [2020-11-22 13:05:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:11,306 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2020-11-22 13:05:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:05:11,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-22 13:05:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:11,308 INFO L225 Difference]: With dead ends: 28 [2020-11-22 13:05:11,309 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 13:05:11,309 INFO L677 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 [2020-11-22 13:05:11,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 13:05:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-11-22 13:05:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 13:05:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-22 13:05:11,316 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 6 [2020-11-22 13:05:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:11,316 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-22 13:05:11,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:05:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-22 13:05:11,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:05:11,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:11,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:05:11,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:05:11,318 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:11,318 INFO L82 PathProgramCache]: Analyzing trace with hash 939444354, now seen corresponding path program 1 times [2020-11-22 13:05:11,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:11,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613572926] [2020-11-22 13:05:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:11,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613572926] [2020-11-22 13:05:11,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:11,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:11,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915383444] [2020-11-22 13:05:11,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:05:11,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:11,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:05:11,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:05:11,411 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-11-22 13:05:11,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:11,509 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-11-22 13:05:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:05:11,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-22 13:05:11,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:11,511 INFO L225 Difference]: With dead ends: 39 [2020-11-22 13:05:11,512 INFO L226 Difference]: Without dead ends: 38 [2020-11-22 13:05:11,512 INFO L677 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 [2020-11-22 13:05:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-22 13:05:11,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-11-22 13:05:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:05:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-11-22 13:05:11,529 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 6 [2020-11-22 13:05:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:11,532 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-11-22 13:05:11,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:05:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-11-22 13:05:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:05:11,533 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:11,533 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:11,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:05:11,534 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:11,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:11,536 INFO L82 PathProgramCache]: Analyzing trace with hash 312291472, now seen corresponding path program 1 times [2020-11-22 13:05:11,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:11,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727754006] [2020-11-22 13:05:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:11,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727754006] [2020-11-22 13:05:11,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:11,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:05:11,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276431616] [2020-11-22 13:05:11,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:05:11,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:11,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:05:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:05:11,608 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2020-11-22 13:05:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:11,710 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-11-22 13:05:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:05:11,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-22 13:05:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:11,712 INFO L225 Difference]: With dead ends: 55 [2020-11-22 13:05:11,712 INFO L226 Difference]: Without dead ends: 54 [2020-11-22 13:05:11,712 INFO L677 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 [2020-11-22 13:05:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-22 13:05:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-11-22 13:05:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-22 13:05:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-11-22 13:05:11,731 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 10 [2020-11-22 13:05:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:11,732 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-11-22 13:05:11,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:05:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-11-22 13:05:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:05:11,734 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:11,734 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:11,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:05:11,735 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:11,736 INFO L82 PathProgramCache]: Analyzing trace with hash -904725729, now seen corresponding path program 1 times [2020-11-22 13:05:11,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:11,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186016681] [2020-11-22 13:05:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:05:11,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186016681] [2020-11-22 13:05:11,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957533529] [2020-11-22 13:05:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/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 [2020-11-22 13:05:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:11,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-22 13:05:11,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:12,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:12,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1309668506] [2020-11-22 13:05:12,455 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-22 13:05:12,455 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:05:12,460 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:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-22 13:05:12,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:05:12,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2020-11-22 13:05:12,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137483542] [2020-11-22 13:05:12,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-22 13:05:12,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:12,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-22 13:05:12,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-22 13:05:12,464 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 22 states. [2020-11-22 13:05:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:13,342 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-11-22 13:05:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-22 13:05:13,342 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 18 [2020-11-22 13:05:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:13,345 INFO L225 Difference]: With dead ends: 83 [2020-11-22 13:05:13,345 INFO L226 Difference]: Without dead ends: 82 [2020-11-22 13:05:13,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-11-22 13:05:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-22 13:05:13,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2020-11-22 13:05:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-22 13:05:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-11-22 13:05:13,361 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2020-11-22 13:05:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:13,361 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-11-22 13:05:13,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-22 13:05:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-11-22 13:05:13,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 13:05:13,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:13,363 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:13,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-22 13:05:13,579 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:13,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:13,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2018278482, now seen corresponding path program 1 times [2020-11-22 13:05:13,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:13,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288510564] [2020-11-22 13:05:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:05:13,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288510564] [2020-11-22 13:05:13,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:13,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:05:13,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057776213] [2020-11-22 13:05:13,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 13:05:13,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:13,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 13:05:13,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:05:13,648 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2020-11-22 13:05:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:13,829 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2020-11-22 13:05:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-22 13:05:13,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-11-22 13:05:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:13,831 INFO L225 Difference]: With dead ends: 98 [2020-11-22 13:05:13,831 INFO L226 Difference]: Without dead ends: 97 [2020-11-22 13:05:13,832 INFO L677 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 [2020-11-22 13:05:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-22 13:05:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-11-22 13:05:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-22 13:05:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2020-11-22 13:05:13,857 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 19 [2020-11-22 13:05:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:13,857 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2020-11-22 13:05:13,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 13:05:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2020-11-22 13:05:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-22 13:05:13,859 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:13,859 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-22 13:05:13,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:05:13,859 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:13,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1310326519, now seen corresponding path program 1 times [2020-11-22 13:05:13,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:13,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679993420] [2020-11-22 13:05:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-11-22 13:05:13,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679993420] [2020-11-22 13:05:13,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:13,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-22 13:05:13,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241876300] [2020-11-22 13:05:13,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:05:13,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:13,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:05:13,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:05:13,952 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand 8 states. [2020-11-22 13:05:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:14,154 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2020-11-22 13:05:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-22 13:05:14,160 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-11-22 13:05:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:14,161 INFO L225 Difference]: With dead ends: 92 [2020-11-22 13:05:14,161 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:05:14,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-11-22 13:05:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:05:14,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:05:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:05:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:05:14,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2020-11-22 13:05:14,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:14,167 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:05:14,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:05:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:05:14,167 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:05:14,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:05:14,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:05:14,658 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2020-11-22 13:05:14,662 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:05:14,662 INFO L270 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))) [2020-11-22 13:05:14,662 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-11-22 13:05:14,662 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:05:14,663 INFO L274 CegarLoopResult]: For program point mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 11) no Hoare annotation was computed. [2020-11-22 13:05:14,663 INFO L274 CegarLoopResult]: For program point mc91FINAL(lines 8 12) no Hoare annotation was computed. [2020-11-22 13:05:14,663 INFO L274 CegarLoopResult]: For program point mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 11) no Hoare annotation was computed. [2020-11-22 13:05:14,663 INFO L274 CegarLoopResult]: For program point mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2020-11-22 13:05:14,663 INFO L274 CegarLoopResult]: For program point mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2020-11-22 13:05:14,663 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-22 13:05:14,663 INFO L274 CegarLoopResult]: For program point L10(lines 10 11) no Hoare annotation was computed. [2020-11-22 13:05:14,663 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-11-22 13:05:14,664 INFO L274 CegarLoopResult]: For program point L10-1(line 10) no Hoare annotation was computed. [2020-11-22 13:05:14,664 INFO L270 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (and (or (not (<= 0 (+ |mc91_#in~n| 2147483648))) (and (<= mc91_~n |mc91_#in~n|) (<= 0 (+ mc91_~n 2147483648))) (not (<= |mc91_#in~n| 111))) (or (not (<= |mc91_#in~n| 2147483648)) (and (<= mc91_~n 100) (<= 91 mc91_~n)) (not (<= 91 |mc91_#in~n|)))) [2020-11-22 13:05:14,664 INFO L274 CegarLoopResult]: For program point L10-2(line 10) no Hoare annotation was computed. [2020-11-22 13:05:14,664 INFO L274 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-11-22 13:05:14,664 INFO L270 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 (<= mc91_~n 100) .cse0 .cse1 (<= 91 mc91_~n)) (not (<= |mc91_#in~n| 2147483648)) (not (<= 91 |mc91_#in~n|))) (or (and (<= mc91_~n |mc91_#in~n|) .cse0 (<= 0 (+ mc91_~n 2147483648)) .cse1) (not (<= 0 (+ |mc91_#in~n| 2147483648))) (not (<= |mc91_#in~n| 111))))) [2020-11-22 13:05:14,664 INFO L277 CegarLoopResult]: At program point mc91ENTRY(lines 8 12) the Hoare annotation is: true [2020-11-22 13:05:14,665 INFO L274 CegarLoopResult]: For program point L11-5(line 11) no Hoare annotation was computed. [2020-11-22 13:05:14,665 INFO L274 CegarLoopResult]: For program point mc91EXIT(lines 8 12) no Hoare annotation was computed. [2020-11-22 13:05:14,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:05:14 BoogieIcfgContainer [2020-11-22 13:05:14,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:05:14,670 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:05:14,670 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:05:14,670 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:05:14,670 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:10" (3/4) ... [2020-11-22 13:05:14,677 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:05:14,685 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure mc91 [2020-11-22 13:05:14,693 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-22 13:05:14,693 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:05:14,693 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:05:14,751 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e1faf6de-f18b-4244-bc12-04e5d6e11341/bin/utaipan/witness.graphml [2020-11-22 13:05:14,751 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:05:14,752 INFO L168 Benchmark]: Toolchain (without parser) took 4654.30 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 84.6 MB in the beginning and 39.1 MB in the end (delta: 45.5 MB). Peak memory consumption was 77.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:14,753 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 75.5 MB. Free memory is still 37.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:14,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.92 ms. Allocated memory is still 113.2 MB. Free memory was 84.2 MB in the beginning and 90.3 MB in the end (delta: -6.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:14,760 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.26 ms. Allocated memory is still 113.2 MB. Free memory was 90.3 MB in the beginning and 88.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:14,761 INFO L168 Benchmark]: Boogie Preprocessor took 21.37 ms. Allocated memory is still 113.2 MB. Free memory was 88.9 MB in the beginning and 88.4 MB in the end (delta: 523.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:14,761 INFO L168 Benchmark]: RCFGBuilder took 266.42 ms. Allocated memory is still 113.2 MB. Free memory was 88.1 MB in the beginning and 78.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:14,762 INFO L168 Benchmark]: TraceAbstraction took 4068.69 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 78.0 MB in the beginning and 41.2 MB in the end (delta: 36.8 MB). Peak memory consumption was 70.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:14,762 INFO L168 Benchmark]: Witness Printer took 81.21 ms. Allocated memory is still 144.7 MB. Free memory was 41.2 MB in the beginning and 39.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:14,764 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 75.5 MB. Free memory is still 37.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 165.92 ms. Allocated memory is still 113.2 MB. Free memory was 84.2 MB in the beginning and 90.3 MB in the end (delta: -6.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.26 ms. Allocated memory is still 113.2 MB. Free memory was 90.3 MB in the beginning and 88.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.37 ms. Allocated memory is still 113.2 MB. Free memory was 88.9 MB in the beginning and 88.4 MB in the end (delta: 523.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 266.42 ms. Allocated memory is still 113.2 MB. Free memory was 88.1 MB in the beginning and 78.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4068.69 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 78.0 MB in the beginning and 41.2 MB in the end (delta: 36.8 MB). Peak memory consumption was 70.0 MB. Max. memory is 16.1 GB. * Witness Printer took 81.21 ms. Allocated memory is still 144.7 MB. Free memory was 41.2 MB in the beginning and 39.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 260 SDslu, 234 SDs, 0 SdLazy, 530 SolverSat, 170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.3s 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 64 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 58 PreInvPairs, 58 NumberOfFragments, 96 HoareAnnotationTreeSize, 58 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 4 FomulaSimplificationsInter, 371 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s 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, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...