./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.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_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/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 0564e568992a96ba006237c1af458e049de52506 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 13:07:32,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:07:32,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:07:32,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:07:32,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:07:32,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:07:32,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:07:32,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:07:32,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:07:32,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:07:32,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:07:32,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:07:32,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:07:32,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:07:32,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:07:32,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:07:32,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:07:32,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:07:32,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:07:32,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:07:32,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:07:32,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:07:32,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:07:32,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:07:32,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:07:32,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:07:32,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:07:32,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:07:32,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:07:32,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:07:32,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:07:32,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:07:32,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:07:32,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:07:32,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:07:32,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:07:32,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:07:32,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:07:32,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:07:32,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:07:32,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:07:32,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-22 13:07:32,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:07:32,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:07:32,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:07:32,534 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:07:32,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:07:32,534 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:07:32,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:07:32,534 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:07:32,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:07:32,535 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:07:32,536 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:07:32,536 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:07:32,536 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:07:32,537 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:07:32,537 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:07:32,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:07:32,538 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:07:32,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:07:32,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:07:32,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:07:32,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:07:32,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:07:32,539 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-22 13:07:32,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:07:32,539 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:07:32,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:07:32,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:07:32,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:07:32,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:07:32,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:07:32,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:07:32,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:07:32,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:07:32,542 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:07:32,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:07:32,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:07:32,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:07:32,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:07:32,543 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_5d68a109-044c-4e86-8733-3d35b241cea5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0564e568992a96ba006237c1af458e049de52506 [2020-11-22 13:07:32,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:07:32,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:07:32,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:07:32,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:07:32,823 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:07:32,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c [2020-11-22 13:07:32,883 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/data/322cdde38/b29c6dc5f6c6487d88085c14d738f1dd/FLAG62804808f [2020-11-22 13:07:33,294 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:07:33,295 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c [2020-11-22 13:07:33,300 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/data/322cdde38/b29c6dc5f6c6487d88085c14d738f1dd/FLAG62804808f [2020-11-22 13:07:33,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/data/322cdde38/b29c6dc5f6c6487d88085c14d738f1dd [2020-11-22 13:07:33,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:07:33,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:07:33,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:33,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:07:33,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:07:33,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e590cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33, skipping insertion in model container [2020-11-22 13:07:33,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:07:33,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:07:33,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:33,853 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:07:33,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:33,909 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:07:33,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33 WrapperNode [2020-11-22 13:07:33,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:33,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:07:33,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:07:33,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:07:33,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:07:33,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:07:33,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:07:33,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:07:33,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (1/1) ... [2020-11-22 13:07:33,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:07:33,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:07:33,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:07:33,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:07:33,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/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 13:07:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:07:34,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:07:34,382 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:07:34,382 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-22 13:07:34,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:34 BoogieIcfgContainer [2020-11-22 13:07:34,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:07:34,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:07:34,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:07:34,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:07:34,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:07:33" (1/3) ... [2020-11-22 13:07:34,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0b06d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:07:34, skipping insertion in model container [2020-11-22 13:07:34,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:33" (2/3) ... [2020-11-22 13:07:34,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0b06d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:07:34, skipping insertion in model container [2020-11-22 13:07:34,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:34" (3/3) ... [2020-11-22 13:07:34,392 INFO L111 eAbstractionObserver]: Analyzing ICFG HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c [2020-11-22 13:07:34,401 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:07:34,405 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-22 13:07:34,419 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 13:07:34,441 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:07:34,441 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:07:34,442 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:07:34,442 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:07:34,442 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:07:34,442 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:07:34,442 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:07:34,443 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:07:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-22 13:07:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:07:34,461 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:34,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:07:34,462 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:07:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:34,468 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-11-22 13:07:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:34,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865606820] [2020-11-22 13:07:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:34,601 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 13:07:34,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865606820] [2020-11-22 13:07:34,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:34,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:07:34,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692309846] [2020-11-22 13:07:34,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:34,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:34,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:34,624 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-11-22 13:07:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:34,743 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-11-22 13:07:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:34,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:07:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:34,759 INFO L225 Difference]: With dead ends: 16 [2020-11-22 13:07:34,759 INFO L226 Difference]: Without dead ends: 13 [2020-11-22 13:07:34,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 13:07:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-22 13:07:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-22 13:07:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 13:07:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-22 13:07:34,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2020-11-22 13:07:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:34,797 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-22 13:07:34,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-22 13:07:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:07:34,798 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:34,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:07:34,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:07:34,799 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:07:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:34,803 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-11-22 13:07:34,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:34,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142780087] [2020-11-22 13:07:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:34,854 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 13:07:34,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142780087] [2020-11-22 13:07:34,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:34,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:07:34,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646929683] [2020-11-22 13:07:34,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:34,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:34,858 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-11-22 13:07:34,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:34,941 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-11-22 13:07:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:07:34,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-22 13:07:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:34,942 INFO L225 Difference]: With dead ends: 17 [2020-11-22 13:07:34,942 INFO L226 Difference]: Without dead ends: 15 [2020-11-22 13:07:34,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-22 13:07:34,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-11-22 13:07:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-22 13:07:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-22 13:07:34,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 4 [2020-11-22 13:07:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:34,948 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-22 13:07:34,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-22 13:07:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:07:34,948 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:34,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:07:34,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:07:34,949 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:07:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:34,950 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2020-11-22 13:07:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:34,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718879926] [2020-11-22 13:07:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:35,015 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 13:07:35,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718879926] [2020-11-22 13:07:35,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:35,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:07:35,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608643090] [2020-11-22 13:07:35,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:35,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:35,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:35,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:35,018 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2020-11-22 13:07:35,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:35,057 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-11-22 13:07:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:35,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-22 13:07:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:35,059 INFO L225 Difference]: With dead ends: 14 [2020-11-22 13:07:35,059 INFO L226 Difference]: Without dead ends: 13 [2020-11-22 13:07:35,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 13:07:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-22 13:07:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-22 13:07:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-22 13:07:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-11-22 13:07:35,062 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 6 [2020-11-22 13:07:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:35,063 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-11-22 13:07:35,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-11-22 13:07:35,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:07:35,063 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:35,064 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:35,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:07:35,064 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:07:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:35,065 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2020-11-22 13:07:35,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:35,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449501285] [2020-11-22 13:07:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:35,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449501285] [2020-11-22 13:07:35,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701905473] [2020-11-22 13:07:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-22 13:07:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:35,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-22 13:07:35,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:35,267 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 13:07:35,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:35,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:07:35,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2020-11-22 13:07:35,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769069562] [2020-11-22 13:07:35,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:07:35,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:35,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:07:35,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:07:35,330 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-11-22 13:07:35,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:35,390 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-11-22 13:07:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:07:35,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-22 13:07:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:35,391 INFO L225 Difference]: With dead ends: 14 [2020-11-22 13:07:35,391 INFO L226 Difference]: Without dead ends: 13 [2020-11-22 13:07:35,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2020-11-22 13:07:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-22 13:07:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-22 13:07:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 13:07:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-22 13:07:35,395 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2020-11-22 13:07:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:35,395 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-22 13:07:35,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:07:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-22 13:07:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:07:35,396 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:35,396 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-11-22 13:07:35,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:35,609 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:07:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash 720506461, now seen corresponding path program 1 times [2020-11-22 13:07:35,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:35,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724031504] [2020-11-22 13:07:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:35,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724031504] [2020-11-22 13:07:35,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677943734] [2020-11-22 13:07:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-22 13:07:35,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:35,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:35,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1544774694] [2020-11-22 13:07:35,791 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 13:07:35,791 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:07:35,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:07:35,804 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:07:35,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:07:36,201 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:07:36,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:07:36,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2020-11-22 13:07:36,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389022097] [2020-11-22 13:07:36,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:07:36,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:36,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:07:36,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-22 13:07:36,449 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-11-22 13:07:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:36,665 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-11-22 13:07:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:07:36,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-22 13:07:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:36,666 INFO L225 Difference]: With dead ends: 12 [2020-11-22 13:07:36,666 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 13:07:36,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-22 13:07:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 13:07:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-22 13:07:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-22 13:07:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-22 13:07:36,670 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-11-22 13:07:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:36,670 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-22 13:07:36,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:07:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-22 13:07:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:07:36,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:36,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-11-22 13:07:36,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:36,881 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:07:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2020-11-22 13:07:36,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:36,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642296611] [2020-11-22 13:07:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:36,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642296611] [2020-11-22 13:07:36,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250736466] [2020-11-22 13:07:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-22 13:07:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:07:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:36,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:36,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [690566982] [2020-11-22 13:07:36,985 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 13:07:36,985 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:07:36,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:07:36,986 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:07:36,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:07:37,122 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:07:37,362 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:07:37,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:07:37,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-22 13:07:37,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47134874] [2020-11-22 13:07:37,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:07:37,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:37,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:07:37,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:07:37,364 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-11-22 13:07:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:37,414 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-11-22 13:07:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:07:37,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-22 13:07:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:37,415 INFO L225 Difference]: With dead ends: 27 [2020-11-22 13:07:37,415 INFO L226 Difference]: Without dead ends: 26 [2020-11-22 13:07:37,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:07:37,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-22 13:07:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-22 13:07:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-22 13:07:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-11-22 13:07:37,420 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 10 [2020-11-22 13:07:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:37,420 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-11-22 13:07:37,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:07:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-11-22 13:07:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-22 13:07:37,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:37,421 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2020-11-22 13:07:37,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-22 13:07:37,633 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:07:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2020-11-22 13:07:37,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:37,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032269308] [2020-11-22 13:07:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:37,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032269308] [2020-11-22 13:07:37,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909401755] [2020-11-22 13:07:37,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-22 13:07:37,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-22 13:07:37,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:37,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-22 13:07:37,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:37,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:37,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850202436] [2020-11-22 13:07:37,878 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 13:07:37,878 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:07:37,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:07:37,879 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:07:37,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:07:37,991 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:07:38,303 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:07:38,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:07:38,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-22 13:07:38,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654389108] [2020-11-22 13:07:38,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-22 13:07:38,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:38,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-22 13:07:38,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:07:38,306 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2020-11-22 13:07:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:38,575 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-11-22 13:07:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-22 13:07:38,575 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-11-22 13:07:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:38,576 INFO L225 Difference]: With dead ends: 57 [2020-11-22 13:07:38,576 INFO L226 Difference]: Without dead ends: 56 [2020-11-22 13:07:38,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:07:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-22 13:07:38,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-22 13:07:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-22 13:07:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-11-22 13:07:38,587 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 25 [2020-11-22 13:07:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:38,588 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-11-22 13:07:38,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-22 13:07:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-11-22 13:07:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-22 13:07:38,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:38,590 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2020-11-22 13:07:38,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:38,805 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:07:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2020-11-22 13:07:38,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:38,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945344156] [2020-11-22 13:07:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:39,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945344156] [2020-11-22 13:07:39,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073074938] [2020-11-22 13:07:39,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:39,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-22 13:07:39,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:07:39,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-22 13:07:39,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:39,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:39,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [936238412] [2020-11-22 13:07:39,430 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 13:07:39,430 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:07:39,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:07:39,432 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:07:39,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:07:39,539 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:07:40,027 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:07:40,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:07:40,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-11-22 13:07:40,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216240176] [2020-11-22 13:07:40,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-22 13:07:40,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-22 13:07:40,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-11-22 13:07:40,030 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 24 states. [2020-11-22 13:07:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:40,343 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-11-22 13:07:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-22 13:07:40,344 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-11-22 13:07:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:40,346 INFO L225 Difference]: With dead ends: 117 [2020-11-22 13:07:40,346 INFO L226 Difference]: Without dead ends: 116 [2020-11-22 13:07:40,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-11-22 13:07:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-22 13:07:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-11-22 13:07:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-11-22 13:07:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-11-22 13:07:40,378 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 55 [2020-11-22 13:07:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:40,378 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-11-22 13:07:40,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-22 13:07:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-11-22 13:07:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-22 13:07:40,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:40,383 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1] [2020-11-22 13:07:40,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-22 13:07:40,609 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:07:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1393971939, now seen corresponding path program 4 times [2020-11-22 13:07:40,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:40,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583736537] [2020-11-22 13:07:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:41,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583736537] [2020-11-22 13:07:41,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678133953] [2020-11-22 13:07:41,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:41,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-22 13:07:41,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:41,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:42,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1431125817] [2020-11-22 13:07:42,376 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 13:07:42,376 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:07:42,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:07:42,376 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:07:42,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:07:42,484 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:07:43,597 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:07:43,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:07:43,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2020-11-22 13:07:43,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475512710] [2020-11-22 13:07:43,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-22 13:07:43,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:43,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-22 13:07:43,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-11-22 13:07:43,602 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 48 states. [2020-11-22 13:07:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:44,009 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2020-11-22 13:07:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-22 13:07:44,009 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 115 [2020-11-22 13:07:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:44,012 INFO L225 Difference]: With dead ends: 237 [2020-11-22 13:07:44,012 INFO L226 Difference]: Without dead ends: 236 [2020-11-22 13:07:44,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 292 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-11-22 13:07:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-22 13:07:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2020-11-22 13:07:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-11-22 13:07:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2020-11-22 13:07:44,061 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 115 [2020-11-22 13:07:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:44,063 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2020-11-22 13:07:44,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-22 13:07:44,063 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2020-11-22 13:07:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-11-22 13:07:44,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:44,071 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1] [2020-11-22 13:07:44,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:44,297 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:07:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1923709923, now seen corresponding path program 5 times [2020-11-22 13:07:44,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:44,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296887757] [2020-11-22 13:07:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:46,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296887757] [2020-11-22 13:07:46,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700069378] [2020-11-22 13:07:46,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:46,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-22 13:07:46,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:07:46,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-22 13:07:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2020-11-22 13:07:46,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2020-11-22 13:07:47,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43956470] [2020-11-22 13:07:47,147 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 13:07:47,147 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:07:47,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:07:47,148 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:07:47,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:07:47,244 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:07:50,926 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:07:50,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:07:50,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 8, 8] total 62 [2020-11-22 13:07:50,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584847606] [2020-11-22 13:07:50,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-22 13:07:50,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:50,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-22 13:07:50,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1556, Invalid=3000, Unknown=0, NotChecked=0, Total=4556 [2020-11-22 13:07:50,930 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 63 states. [2020-11-22 13:07:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:59,329 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2020-11-22 13:07:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-11-22 13:07:59,329 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 235 [2020-11-22 13:07:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:59,332 INFO L225 Difference]: With dead ends: 243 [2020-11-22 13:07:59,332 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:07:59,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 637 SyntacticMatches, 47 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16506 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=12307, Invalid=32425, Unknown=0, NotChecked=0, Total=44732 [2020-11-22 13:07:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:07:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:07:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:07:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:07:59,345 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 235 [2020-11-22 13:07:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:59,345 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:07:59,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-22 13:07:59,346 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:07:59,346 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:07:59,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-11-22 13:07:59,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:07:59,661 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 209 [2020-11-22 13:08:00,220 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 30 [2020-11-22 13:08:00,223 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-11-22 13:08:00,223 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:08:00,223 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2020-11-22 13:08:00,223 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-22 13:08:00,223 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-11-22 13:08:00,223 INFO L270 CegarLoopResult]: At program point L17-2(lines 17 20) the Hoare annotation is: (let ((.cse0 (<= 24 ULTIMATE.start_main_~y~0))) (or (and (<= 23 ULTIMATE.start_main_~y~0) (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648)) (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~y~0 2147483624)) (<= ULTIMATE.start_main_~y~0 23)) (and (<= ULTIMATE.start_main_~y~0 24) (<= ULTIMATE.start_main_~x~0 2147483624) .cse0) (and (<= ULTIMATE.start_main_~y~0 (+ (div (+ (* ULTIMATE.start_main_~x~0 (- 1)) 2147483648) 2) 1)) (<= ULTIMATE.start_main_~y~0 2147483646) .cse0))) [2020-11-22 13:08:00,224 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-11-22 13:08:00,224 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2020-11-22 13:08:00,224 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:08:00,224 INFO L274 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-11-22 13:08:00,224 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-11-22 13:08:00,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:08:00 BoogieIcfgContainer [2020-11-22 13:08:00,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:08:00,250 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:08:00,250 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:08:00,250 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:08:00,251 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:34" (3/4) ... [2020-11-22 13:08:00,255 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:08:00,266 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-22 13:08:00,266 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 13:08:00,267 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:08:00,300 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5d68a109-044c-4e86-8733-3d35b241cea5/bin/utaipan/witness.graphml [2020-11-22 13:08:00,300 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:08:00,303 INFO L168 Benchmark]: Toolchain (without parser) took 26597.19 ms. Allocated memory was 96.5 MB in the beginning and 249.6 MB in the end (delta: 153.1 MB). Free memory was 58.3 MB in the beginning and 147.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 63.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:00,304 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 74.6 MB in the beginning and 74.6 MB in the end (delta: 50.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:08:00,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.40 ms. Allocated memory is still 96.5 MB. Free memory was 58.1 MB in the beginning and 74.1 MB in the end (delta: -16.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:00,306 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.17 ms. Allocated memory is still 96.5 MB. Free memory was 74.1 MB in the beginning and 72.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:08:00,307 INFO L168 Benchmark]: Boogie Preprocessor took 21.85 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.8 MB in the end (delta: 863.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:08:00,307 INFO L168 Benchmark]: RCFGBuilder took 408.78 ms. Allocated memory is still 96.5 MB. Free memory was 71.8 MB in the beginning and 61.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:00,310 INFO L168 Benchmark]: TraceAbstraction took 25863.47 ms. Allocated memory was 96.5 MB in the beginning and 249.6 MB in the end (delta: 153.1 MB). Free memory was 61.3 MB in the beginning and 149.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 143.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:00,311 INFO L168 Benchmark]: Witness Printer took 50.33 ms. Allocated memory is still 249.6 MB. Free memory was 149.2 MB in the beginning and 147.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:00,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 74.6 MB in the beginning and 74.6 MB in the end (delta: 50.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 206.40 ms. Allocated memory is still 96.5 MB. Free memory was 58.1 MB in the beginning and 74.1 MB in the end (delta: -16.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.17 ms. Allocated memory is still 96.5 MB. Free memory was 74.1 MB in the beginning and 72.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.85 ms. Allocated memory is still 96.5 MB. Free memory was 72.7 MB in the beginning and 71.8 MB in the end (delta: 863.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 408.78 ms. Allocated memory is still 96.5 MB. Free memory was 71.8 MB in the beginning and 61.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25863.47 ms. Allocated memory was 96.5 MB in the beginning and 249.6 MB in the end (delta: 153.1 MB). Free memory was 61.3 MB in the beginning and 149.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 143.1 MB. Max. memory is 16.1 GB. * Witness Printer took 50.33 ms. Allocated memory is still 249.6 MB. Free memory was 149.2 MB in the beginning and 147.1 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: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: 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 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((23 <= y && 0 <= x + 2147483648) && x <= y + 2147483624) && y <= 23) || ((y <= 24 && x <= 2147483624) && 24 <= y)) || ((y <= (x * -1 + 2147483648) / 2 + 1 && y <= 2147483646) && 24 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.1s, OverallIterations: 10, TraceHistogramMax: 47, AutomataDifference: 10.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 384 SDslu, 83 SDs, 0 SdLazy, 739 SolverSat, 217 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1164 SyntacticMatches, 91 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19193 ImplicationChecksByTransitivity, 18.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=236occurred in iteration=9, 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, 10 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 49 NumberOfFragments, 46 HoareAnnotationTreeSize, 1 FomulaSimplifications, 810 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 1761 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 927 NumberOfCodeBlocks, 717 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1360 ConstructedInterpolants, 0 QuantifiedInterpolants, 455104 SizeOfPredicates, 6 NumberOfNonLiveVariables, 478 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 24 InterpolantComputations, 4 PerfectInterpolantSequences, 10678/20766 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: OVERALL_TIME[ms]: 411, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 24, TOOLS_POST_TIME[ms]: 31, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 24, TOOLS_QUANTIFIERELIM_TIME[ms]: 15, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 3, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 39, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 4, DOMAIN_JOIN_TIME[ms]: 130, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 144, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 6, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME[ms]: 40, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 180, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 180, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 6, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 9, DAG_COMPRESSION_PROCESSED_NODES: 77, DAG_COMPRESSION_RETAINED_NODES: 27, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...