./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7862960b0aa057ac19174563f251d134d1269c2b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 10:50:03,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:50:03,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:50:03,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:50:03,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:50:03,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:50:03,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:50:03,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:50:03,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:50:03,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:50:03,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:50:03,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:50:03,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:50:03,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:50:03,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:50:03,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:50:03,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:50:03,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:50:03,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:50:03,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:50:03,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:50:03,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:50:03,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:50:03,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:50:03,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:50:03,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:50:03,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:50:03,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:50:03,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:50:03,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:50:03,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:50:03,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:50:03,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:50:03,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:50:03,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:50:03,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:50:03,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:50:03,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:50:03,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:50:03,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:50:03,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:50:03,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:50:03,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:50:03,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:50:03,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:50:03,599 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:50:03,599 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:50:03,599 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:50:03,599 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:50:03,600 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:50:03,600 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:50:03,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:50:03,600 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:50:03,600 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:50:03,600 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:50:03,600 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:50:03,600 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:50:03,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:50:03,601 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:50:03,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:50:03,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:50:03,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:50:03,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:50:03,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:50:03,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:50:03,602 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:50:03,602 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:50:03,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:50:03,602 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:50:03,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:50:03,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:50:03,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:50:03,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:50:03,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:50:03,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:50:03,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:50:03,603 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:50:03,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:50:03,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:50:03,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:50:03,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:50:03,603 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_1d894f44-bea0-47c9-bd0a-de4d061bf284/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7862960b0aa057ac19174563f251d134d1269c2b [2020-12-09 10:50:03,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:50:03,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:50:03,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:50:03,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:50:03,817 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:50:03,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-12-09 10:50:03,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/data/d9e496f1f/33eab5c9591944388cf7bf241cff5551/FLAGd4e67bf71 [2020-12-09 10:50:04,213 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:50:04,213 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-12-09 10:50:04,218 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/data/d9e496f1f/33eab5c9591944388cf7bf241cff5551/FLAGd4e67bf71 [2020-12-09 10:50:04,231 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/data/d9e496f1f/33eab5c9591944388cf7bf241cff5551 [2020-12-09 10:50:04,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:50:04,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:50:04,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:50:04,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:50:04,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:50:04,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6bcab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04, skipping insertion in model container [2020-12-09 10:50:04,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:50:04,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:50:04,368 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2020-12-09 10:50:04,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:50:04,392 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:50:04,401 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2020-12-09 10:50:04,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:50:04,422 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:50:04,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04 WrapperNode [2020-12-09 10:50:04,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:50:04,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:50:04,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:50:04,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:50:04,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:50:04,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:50:04,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:50:04,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:50:04,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (1/1) ... [2020-12-09 10:50:04,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:50:04,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:50:04,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:50:04,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:50:04,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/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 [2020-12-09 10:50:04,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:50:04,531 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-12-09 10:50:04,531 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-12-09 10:50:04,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:50:04,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 10:50:04,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:50:04,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:50:04,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 10:50:04,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 10:50:04,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:50:04,855 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-09 10:50:04,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:50:04 BoogieIcfgContainer [2020-12-09 10:50:04,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:50:04,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:50:04,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:50:04,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:50:04,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:50:04" (1/3) ... [2020-12-09 10:50:04,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f088f69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:50:04, skipping insertion in model container [2020-12-09 10:50:04,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:50:04" (2/3) ... [2020-12-09 10:50:04,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f088f69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:50:04, skipping insertion in model container [2020-12-09 10:50:04,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:50:04" (3/3) ... [2020-12-09 10:50:04,864 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-12-09 10:50:04,877 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:50:04,880 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 10:50:04,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 10:50:04,903 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:50:04,904 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:50:04,904 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:50:04,904 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:50:04,904 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:50:04,904 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:50:04,904 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:50:04,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:50:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 10:50:04,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 10:50:04,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:50:04,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 10:50:04,918 INFO L429 AbstractCegarLoop]: === Iteration 1 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:50:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:50:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1322549321, now seen corresponding path program 1 times [2020-12-09 10:50:04,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:50:04,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539232924] [2020-12-09 10:50:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:50:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:50:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:50:05,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539232924] [2020-12-09 10:50:05,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:50:05,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 10:50:05,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161725428] [2020-12-09 10:50:05,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:50:05,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:50:05,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:50:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:50:05,092 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-12-09 10:50:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:50:05,175 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-12-09 10:50:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 10:50:05,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 10:50:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:50:05,181 INFO L225 Difference]: With dead ends: 50 [2020-12-09 10:50:05,182 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 10:50:05,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 10:50:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 10:50:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-12-09 10:50:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 10:50:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-09 10:50:05,209 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2020-12-09 10:50:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:50:05,210 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-09 10:50:05,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:50:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-09 10:50:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 10:50:05,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:50:05,211 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:50:05,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:50:05,211 INFO L429 AbstractCegarLoop]: === Iteration 2 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:50:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:50:05,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1638230465, now seen corresponding path program 1 times [2020-12-09 10:50:05,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:50:05,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133450221] [2020-12-09 10:50:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:50:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:50:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:50:05,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133450221] [2020-12-09 10:50:05,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492530263] [2020-12-09 10:50:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:50:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:50:05,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 10:50:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:50:05,497 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-09 10:50:05,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,503 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-09 10:50:05,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,535 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 10:50:05,535 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2020-12-09 10:50:05,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 10:50:05,554 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 10:50:05,562 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 10:50:05,562 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2020-12-09 10:50:05,565 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,570 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 10:50:05,580 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 10:50:05,582 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 10:50:05,582 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:59, output treesize:29 [2020-12-09 10:50:05,618 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,622 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 10:50:05,628 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 10:50:05,668 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 10:50:05,673 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 10:50:05,677 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 10:50:05,712 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-09 10:50:05,715 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,716 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,726 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 10:50:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:50:05,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:50:05,770 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:50:05,771 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:50:05,773 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:50:05,778 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:50:05,779 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:50:05,781 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:50:05,787 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 1] term [2020-12-09 10:50:05,787 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:50:05,795 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 10:50:05,797 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2020-12-09 10:50:05,799 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 10:50:05,806 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 10:50:05,806 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2020-12-09 10:50:05,808 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 10:50:05,837 INFO L625 ElimStorePlain]: treesize reduction 20, result has 69.2 percent of original size [2020-12-09 10:50:05,843 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 10:50:05,843 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2020-12-09 10:50:05,845 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:50:05,846 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-09 10:50:05,858 INFO L625 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2020-12-09 10:50:05,859 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-12-09 10:50:05,859 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:97, output treesize:22 [2020-12-09 10:50:05,899 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-12-09 10:50:05,900 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:50:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:50:05,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [505126681] [2020-12-09 10:50:05,920 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 10:50:05,920 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:50:05,924 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 10:50:05,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:50:05,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 16 [2020-12-09 10:50:05,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246152050] [2020-12-09 10:50:05,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 10:50:05,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:50:05,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 10:50:05,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-09 10:50:05,927 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2020-12-09 10:50:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:50:06,216 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-12-09 10:50:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 10:50:06,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 11 [2020-12-09 10:50:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:50:06,217 INFO L225 Difference]: With dead ends: 27 [2020-12-09 10:50:06,217 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 10:50:06,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2020-12-09 10:50:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 10:50:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-12-09 10:50:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 10:50:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-09 10:50:06,223 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2020-12-09 10:50:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:50:06,223 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-09 10:50:06,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 10:50:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-09 10:50:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 10:50:06,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:50:06,224 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:50:06,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 10:50:06,427 INFO L429 AbstractCegarLoop]: === Iteration 3 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:50:06,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:50:06,428 INFO L82 PathProgramCache]: Analyzing trace with hash 811476224, now seen corresponding path program 1 times [2020-12-09 10:50:06,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:50:06,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672376342] [2020-12-09 10:50:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:50:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:50:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:50:06,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672376342] [2020-12-09 10:50:06,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795728692] [2020-12-09 10:50:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/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 [2020-12-09 10:50:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:50:06,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 10:50:06,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:50:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:50:06,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:50:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:50:36,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679324244] [2020-12-09 10:50:36,845 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 10:50:36,845 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:50:36,845 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 10:50:36,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:50:36,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2020-12-09 10:50:36,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825694984] [2020-12-09 10:50:36,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 10:50:36,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:50:36,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 10:50:36,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=170, Unknown=15, NotChecked=0, Total=240 [2020-12-09 10:50:36,848 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 16 states. [2020-12-09 10:50:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:50:36,943 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-12-09 10:50:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 10:50:36,944 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-12-09 10:50:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:50:36,945 INFO L225 Difference]: With dead ends: 23 [2020-12-09 10:50:36,945 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 10:50:36,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=81, Invalid=210, Unknown=15, NotChecked=0, Total=306 [2020-12-09 10:50:36,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 10:50:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 10:50:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 10:50:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 10:50:36,946 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-12-09 10:50:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:50:36,947 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 10:50:36,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 10:50:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 10:50:36,947 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 10:50:37,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:50:37,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 10:50:37,315 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-12-09 10:50:37,326 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 10:50:37,326 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 10:50:37,326 INFO L258 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (= (select |#memory_int| ULTIMATE.start_main_~a~0.base) ((as const (Array Int Int)) 0)) [2020-12-09 10:50:37,326 INFO L265 CegarLoopResult]: At program point L46-1(line 46) the Hoare annotation is: true [2020-12-09 10:50:37,326 INFO L265 CegarLoopResult]: At program point checkENTRY(lines 16 39) the Hoare annotation is: true [2020-12-09 10:50:37,326 INFO L262 CegarLoopResult]: For program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2020-12-09 10:50:37,326 INFO L258 CegarLoopResult]: At program point L25-2(lines 25 26) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (and (= check___VERIFIER_assert_~cond 1) (<= 0 check_~x) (<= (+ check_~y 1) check_~n) (= (select |#memory_int| check_~a.base) .cse0) (or (and (not (= (+ (* check_~y 4) 4) (* check_~x 4))) (<= (+ check_~y 2) check_~n)) (<= 1 check_~x))) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse0)))) [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point L11-4(line 11) no Hoare annotation was computed. [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point checkFINAL(lines 16 39) no Hoare annotation was computed. [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point checkErr1ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point checkEXIT(lines 16 39) no Hoare annotation was computed. [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-12-09 10:50:37,327 INFO L262 CegarLoopResult]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-12-09 10:50:37,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:50:37 BoogieIcfgContainer [2020-12-09 10:50:37,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:50:37,333 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:50:37,333 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:50:37,334 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:50:37,334 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:50:04" (3/4) ... [2020-12-09 10:50:37,336 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 10:50:37,339 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2020-12-09 10:50:37,343 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-12-09 10:50:37,344 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 10:50:37,344 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 10:50:37,344 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 10:50:37,376 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1d894f44-bea0-47c9-bd0a-de4d061bf284/bin/utaipan/witness.graphml [2020-12-09 10:50:37,376 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:50:37,378 INFO L168 Benchmark]: Toolchain (without parser) took 33142.44 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 56.6 MB in the beginning and 70.9 MB in the end (delta: -14.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2020-12-09 10:50:37,378 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 96.5 MB. Free memory is still 72.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:50:37,378 INFO L168 Benchmark]: CACSL2BoogieTranslator took 186.48 ms. Allocated memory is still 96.5 MB. Free memory was 56.5 MB in the beginning and 70.6 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:50:37,379 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.84 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 68.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:50:37,379 INFO L168 Benchmark]: Boogie Preprocessor took 21.07 ms. Allocated memory is still 96.5 MB. Free memory was 68.6 MB in the beginning and 67.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:50:37,380 INFO L168 Benchmark]: RCFGBuilder took 383.43 ms. Allocated memory is still 96.5 MB. Free memory was 67.5 MB in the beginning and 56.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:50:37,380 INFO L168 Benchmark]: TraceAbstraction took 32474.60 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 55.9 MB in the beginning and 74.1 MB in the end (delta: -18.1 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2020-12-09 10:50:37,380 INFO L168 Benchmark]: Witness Printer took 43.27 ms. Allocated memory is still 130.0 MB. Free memory was 74.1 MB in the beginning and 70.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:50:37,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 96.5 MB. Free memory is still 72.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 186.48 ms. Allocated memory is still 96.5 MB. Free memory was 56.5 MB in the beginning and 70.6 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.84 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 68.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.07 ms. Allocated memory is still 96.5 MB. Free memory was 68.6 MB in the beginning and 67.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 383.43 ms. Allocated memory is still 96.5 MB. Free memory was 67.5 MB in the beginning and 56.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 32474.60 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 55.9 MB in the beginning and 74.1 MB in the end (delta: -18.1 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. * Witness Printer took 43.27 ms. Allocated memory is still 130.0 MB. Free memory was 74.1 MB in the beginning and 70.9 MB in the end (delta: 3.1 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: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32.2s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 123 SDslu, 90 SDs, 0 SdLazy, 140 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 30.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 64 HoareAnnotationTreeSize, 10 FomulaSimplifications, 48 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 309 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 30.9s InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 74 ConstructedInterpolants, 11 QuantifiedInterpolants, 7381 SizeOfPredicates, 43 NumberOfNonLiveVariables, 266 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 4/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...