./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/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 93b306e815c818938e90cb4a568cb4e679b069e8 ....................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:43:20,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:43:20,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:43:20,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:43:20,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:43:20,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:43:20,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:43:20,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:43:20,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:43:20,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:43:20,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:43:20,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:43:20,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:43:20,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:43:20,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:43:20,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:43:20,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:43:20,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:43:20,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:43:20,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:43:20,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:43:20,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:43:20,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:43:20,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:43:20,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:43:20,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:43:20,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:43:20,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:43:20,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:43:20,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:43:20,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:43:20,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:43:20,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:43:20,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:43:20,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:43:20,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:43:20,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:43:20,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:43:20,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:43:20,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:43:20,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:43:20,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:43:21,004 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:43:21,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:43:21,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:43:21,009 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:43:21,009 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:43:21,009 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:43:21,010 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:43:21,010 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:43:21,010 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:43:21,010 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:43:21,018 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:43:21,019 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:43:21,019 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:43:21,019 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:43:21,019 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:43:21,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:43:21,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:43:21,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:43:21,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:43:21,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:43:21,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:43:21,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:43:21,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:43:21,022 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:43:21,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:43:21,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:43:21,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:43:21,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:43:21,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:43:21,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:43:21,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:43:21,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:43:21,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:43:21,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:43:21,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:43:21,027 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:43:21,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:43:21,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:43:21,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:43:21,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:43:21,028 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_977fdd35-ac08-45d5-b797-b8406ab8be60/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93b306e815c818938e90cb4a568cb4e679b069e8 [2020-11-28 07:43:21,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:43:21,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:43:21,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:43:21,421 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:43:21,422 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:43:21,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound2.c [2020-11-28 07:43:21,488 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/data/47f355cde/936745d167764f4e8dc116d30a3da2bf/FLAGcd4dbd417 [2020-11-28 07:43:21,933 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:43:21,934 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound2.c [2020-11-28 07:43:21,955 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/data/47f355cde/936745d167764f4e8dc116d30a3da2bf/FLAGcd4dbd417 [2020-11-28 07:43:22,337 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/data/47f355cde/936745d167764f4e8dc116d30a3da2bf [2020-11-28 07:43:22,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:43:22,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:43:22,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:43:22,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:43:22,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:43:22,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dbff7c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22, skipping insertion in model container [2020-11-28 07:43:22,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:43:22,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:43:22,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:43:22,691 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:43:22,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:43:22,756 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:43:22,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22 WrapperNode [2020-11-28 07:43:22,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:43:22,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:43:22,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:43:22,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:43:22,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:43:22,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:43:22,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:43:22,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:43:22,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:43:22,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:43:22,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:43:22,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:43:22,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/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 [2020-11-28 07:43:22,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:43:22,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:43:22,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:43:22,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:43:23,333 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:43:23,333 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 07:43:23,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:23 BoogieIcfgContainer [2020-11-28 07:43:23,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:43:23,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:43:23,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:43:23,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:43:23,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:43:22" (1/3) ... [2020-11-28 07:43:23,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2396d2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:23, skipping insertion in model container [2020-11-28 07:43:23,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22" (2/3) ... [2020-11-28 07:43:23,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2396d2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:23, skipping insertion in model container [2020-11-28 07:43:23,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:23" (3/3) ... [2020-11-28 07:43:23,360 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound2.c [2020-11-28 07:43:23,393 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:43:23,397 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 07:43:23,415 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 07:43:23,442 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:43:23,442 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:43:23,443 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:43:23,443 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:43:23,443 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:43:23,443 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:43:23,443 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:43:23,443 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:43:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-28 07:43:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:43:23,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:23,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:43:23,466 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash 73178710, now seen corresponding path program 1 times [2020-11-28 07:43:23,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:23,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389202972] [2020-11-28 07:43:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:23,587 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:43:23,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706584160] [2020-11-28 07:43:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:43:23,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:23,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:23,839 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:43:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:23,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389202972] [2020-11-28 07:43:23,868 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:43:23,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706584160] [2020-11-28 07:43:23,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:23,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:43:23,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782133579] [2020-11-28 07:43:23,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:43:23,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:23,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:43:23,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:43:23,905 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 5 states. [2020-11-28 07:43:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:24,051 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2020-11-28 07:43:24,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:43:24,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-28 07:43:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:24,061 INFO L225 Difference]: With dead ends: 30 [2020-11-28 07:43:24,062 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:43:24,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:43:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:43:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:43:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:43:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:43:24,099 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2020-11-28 07:43:24,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:24,099 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:43:24,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:43:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:43:24,100 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:43:24,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 07:43:24,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:43:24,459 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:43:24,459 INFO L274 CegarLoopResult]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2020-11-28 07:43:24,459 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:43:24,460 INFO L270 CegarLoopResult]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~x~0 0) (= ULTIMATE.start_main_~y~0 0)) (and (= (+ ULTIMATE.start_main_~y~0 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (* 2 ULTIMATE.start_main_~x~0)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond))) [2020-11-28 07:43:24,460 INFO L274 CegarLoopResult]: For program point L27-4(lines 27 36) no Hoare annotation was computed. [2020-11-28 07:43:24,460 INFO L274 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-11-28 07:43:24,460 INFO L274 CegarLoopResult]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2020-11-28 07:43:24,460 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:43:24,461 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:43:24,461 INFO L274 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-11-28 07:43:24,461 INFO L270 CegarLoopResult]: At program point L10-1(lines 30 31) the Hoare annotation is: (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (* ULTIMATE.start_main_~x~0 2) (+ (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0))) [2020-11-28 07:43:24,461 INFO L274 CegarLoopResult]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2020-11-28 07:43:24,462 INFO L270 CegarLoopResult]: At program point L10-3(lines 9 15) the Hoare annotation is: (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (* ULTIMATE.start_main_~x~0 2) (+ (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0))) [2020-11-28 07:43:24,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:43:24 BoogieIcfgContainer [2020-11-28 07:43:24,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:43:24,503 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:43:24,503 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:43:24,503 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:43:24,504 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:23" (3/4) ... [2020-11-28 07:43:24,511 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:43:24,527 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:43:24,528 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 07:43:24,529 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:43:24,529 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:43:24,583 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_977fdd35-ac08-45d5-b797-b8406ab8be60/bin/utaipan/witness.graphml [2020-11-28 07:43:24,583 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:43:24,585 INFO L168 Benchmark]: Toolchain (without parser) took 2241.91 ms. Allocated memory is still 98.6 MB. Free memory was 78.2 MB in the beginning and 58.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:24,586 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 79.7 MB. Free memory is still 54.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:43:24,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.79 ms. Allocated memory is still 98.6 MB. Free memory was 78.0 MB in the beginning and 71.8 MB in the end (delta: 6.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:24,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.47 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 70.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:24,588 INFO L168 Benchmark]: Boogie Preprocessor took 26.60 ms. Allocated memory is still 98.6 MB. Free memory was 70.3 MB in the beginning and 69.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:43:24,588 INFO L168 Benchmark]: RCFGBuilder took 487.34 ms. Allocated memory is still 98.6 MB. Free memory was 69.2 MB in the beginning and 55.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:24,589 INFO L168 Benchmark]: TraceAbstraction took 1164.85 ms. Allocated memory is still 98.6 MB. Free memory was 55.1 MB in the beginning and 60.8 MB in the end (delta: -5.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:43:24,590 INFO L168 Benchmark]: Witness Printer took 80.26 ms. Allocated memory is still 98.6 MB. Free memory was 60.8 MB in the beginning and 58.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:24,593 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 79.7 MB. Free memory is still 54.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 410.79 ms. Allocated memory is still 98.6 MB. Free memory was 78.0 MB in the beginning and 71.8 MB in the end (delta: 6.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.47 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 70.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.60 ms. Allocated memory is still 98.6 MB. Free memory was 70.3 MB in the beginning and 69.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 487.34 ms. Allocated memory is still 98.6 MB. Free memory was 69.2 MB in the beginning and 55.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1164.85 ms. Allocated memory is still 98.6 MB. Free memory was 55.1 MB in the beginning and 60.8 MB in the end (delta: -5.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 80.26 ms. Allocated memory is still 98.6 MB. Free memory was 60.8 MB in the beginning and 58.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 <= cond && x * 2 == y * y + y - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (x == 0 && y == 0) || (y + y * y == 2 * x && 1 <= cond) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 <= cond && x * 2 == y * y + y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 SDtfs, 22 SDslu, 7 SDs, 0 SdLazy, 12 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 9 NumberOfFragments, 47 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 22 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 SizeOfPredicates, 4 NumberOfNonLiveVariables, 53 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...