./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested6.i --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_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested6.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/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 b3a725921be8310e882457f7f33c9ff7dbee0bc2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 07:40:26,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:40:26,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:40:26,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:40:26,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:40:26,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:40:26,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:40:26,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:40:26,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:40:26,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:40:26,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:40:26,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:40:26,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:40:26,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:40:26,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:40:26,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:40:26,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:40:26,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:40:26,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:40:26,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:40:26,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:40:26,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:40:26,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:40:26,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:40:26,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:40:26,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:40:26,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:40:26,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:40:26,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:40:26,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:40:26,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:40:26,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:40:26,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:40:26,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:40:26,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:40:26,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:40:26,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:40:26,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:40:26,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:40:26,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:40:26,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:40:26,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:40:26,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:40:26,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:40:26,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:40:26,985 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:40:26,986 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:40:26,986 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:40:26,986 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:40:26,987 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:40:26,987 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:40:26,987 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:40:26,988 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:40:26,988 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:40:26,988 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:40:26,989 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:40:26,989 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:40:26,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:40:26,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:40:26,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:40:26,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:40:26,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:40:26,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:40:26,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:40:26,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:40:26,993 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:40:26,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:40:26,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:40:26,994 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:40:26,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:40:26,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:40:26,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:40:26,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:40:26,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:40:26,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:40:26,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:40:26,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:40:26,998 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:40:26,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:40:26,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:40:26,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:40:26,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:40:26,999 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_6be7e7b9-695c-4f97-af95-86d1a384f87c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2020-11-28 07:40:27,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:40:27,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:40:27,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:40:27,386 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:40:27,386 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:40:27,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/../../sv-benchmarks/c/loop-invgen/nested6.i [2020-11-28 07:40:27,468 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/data/a3b5f7a62/e8da6cc7b5d748d79a02c47c3f37144e/FLAG13134bb5a [2020-11-28 07:40:28,091 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:40:28,092 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/sv-benchmarks/c/loop-invgen/nested6.i [2020-11-28 07:40:28,105 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/data/a3b5f7a62/e8da6cc7b5d748d79a02c47c3f37144e/FLAG13134bb5a [2020-11-28 07:40:28,463 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/data/a3b5f7a62/e8da6cc7b5d748d79a02c47c3f37144e [2020-11-28 07:40:28,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:40:28,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:40:28,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:40:28,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:40:28,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:40:28,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dcafcfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28, skipping insertion in model container [2020-11-28 07:40:28,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:40:28,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:40:28,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:40:28,755 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:40:28,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:40:28,842 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:40:28,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28 WrapperNode [2020-11-28 07:40:28,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:40:28,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:40:28,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:40:28,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:40:28,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:40:28,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:40:28,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:40:28,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:40:28,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... [2020-11-28 07:40:28,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:40:28,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:40:28,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:40:28,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:40:28,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/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 07:40:29,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:40:29,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:40:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:40:29,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:40:29,538 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:40:29,538 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-28 07:40:29,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:29 BoogieIcfgContainer [2020-11-28 07:40:29,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:40:29,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:40:29,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:40:29,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:40:29,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:40:28" (1/3) ... [2020-11-28 07:40:29,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11561ef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:40:29, skipping insertion in model container [2020-11-28 07:40:29,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:28" (2/3) ... [2020-11-28 07:40:29,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11561ef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:40:29, skipping insertion in model container [2020-11-28 07:40:29,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:29" (3/3) ... [2020-11-28 07:40:29,550 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-11-28 07:40:29,563 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:40:29,569 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-28 07:40:29,583 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 07:40:29,631 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:40:29,633 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:40:29,634 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:40:29,634 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:40:29,634 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:40:29,634 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:40:29,634 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:40:29,635 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:40:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-28 07:40:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:40:29,660 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:29,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:29,661 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:29,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1292836131, now seen corresponding path program 1 times [2020-11-28 07:40:29,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:29,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932106123] [2020-11-28 07:40:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:29,972 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 07:40:29,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932106123] [2020-11-28 07:40:29,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:29,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:40:29,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915900327] [2020-11-28 07:40:29,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:40:29,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:40:30,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:30,007 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-11-28 07:40:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:30,142 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2020-11-28 07:40:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:40:30,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-28 07:40:30,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:30,155 INFO L225 Difference]: With dead ends: 58 [2020-11-28 07:40:30,156 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 07:40:30,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:40:30,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 07:40:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2020-11-28 07:40:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:40:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-28 07:40:30,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2020-11-28 07:40:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:30,205 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-28 07:40:30,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:40:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-28 07:40:30,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:40:30,207 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:30,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:30,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:40:30,208 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:30,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:30,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1390427206, now seen corresponding path program 1 times [2020-11-28 07:40:30,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:30,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062620508] [2020-11-28 07:40:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:30,320 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 07:40:30,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062620508] [2020-11-28 07:40:30,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:30,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:40:30,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020076154] [2020-11-28 07:40:30,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:40:30,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:30,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:40:30,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:40:30,325 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2020-11-28 07:40:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:30,589 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-11-28 07:40:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:40:30,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 07:40:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:30,592 INFO L225 Difference]: With dead ends: 35 [2020-11-28 07:40:30,592 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 07:40:30,593 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 [2020-11-28 07:40:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 07:40:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2020-11-28 07:40:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 07:40:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-11-28 07:40:30,600 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2020-11-28 07:40:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:30,600 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-11-28 07:40:30,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:40:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-11-28 07:40:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:40:30,601 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:30,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:30,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:40:30,602 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1135190110, now seen corresponding path program 1 times [2020-11-28 07:40:30,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:30,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111724156] [2020-11-28 07:40:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:30,748 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 07:40:30,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111724156] [2020-11-28 07:40:30,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:30,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:40:30,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90062249] [2020-11-28 07:40:30,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:40:30,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:30,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:40:30,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:30,751 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 4 states. [2020-11-28 07:40:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:30,877 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-11-28 07:40:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:40:30,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 07:40:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:30,880 INFO L225 Difference]: With dead ends: 34 [2020-11-28 07:40:30,880 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 07:40:30,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:40:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 07:40:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-11-28 07:40:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 07:40:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-11-28 07:40:30,906 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 11 [2020-11-28 07:40:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:30,907 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-11-28 07:40:30,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:40:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-11-28 07:40:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:40:30,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:30,908 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:30,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:40:30,909 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:30,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1097272303, now seen corresponding path program 1 times [2020-11-28 07:40:30,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:30,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569987064] [2020-11-28 07:40:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:31,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569987064] [2020-11-28 07:40:31,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582835947] [2020-11-28 07:40:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/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 07:40:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:31,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:40:31,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:31,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:31,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:40:31,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 9 [2020-11-28 07:40:31,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128599651] [2020-11-28 07:40:31,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:40:31,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:31,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:40:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:40:31,404 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2020-11-28 07:40:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:31,732 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2020-11-28 07:40:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 07:40:31,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-28 07:40:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:31,734 INFO L225 Difference]: With dead ends: 77 [2020-11-28 07:40:31,735 INFO L226 Difference]: Without dead ends: 57 [2020-11-28 07:40:31,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:40:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-28 07:40:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 26. [2020-11-28 07:40:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 07:40:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-11-28 07:40:31,755 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2020-11-28 07:40:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:31,755 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-11-28 07:40:31,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:40:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-11-28 07:40:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 07:40:31,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:31,759 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:31,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:40:31,980 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:31,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:31,980 INFO L82 PathProgramCache]: Analyzing trace with hash -462283700, now seen corresponding path program 1 times [2020-11-28 07:40:31,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:31,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235547502] [2020-11-28 07:40:31,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:32,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235547502] [2020-11-28 07:40:32,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64104965] [2020-11-28 07:40:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:40:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:32,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:40:32,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:32,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:32,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1590316214] [2020-11-28 07:40:32,288 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-28 07:40:32,288 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:40:32,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:40:32,302 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:40:32,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:40:32,839 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:40:32,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:40:32,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2020-11-28 07:40:32,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822611074] [2020-11-28 07:40:32,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 07:40:32,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:32,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 07:40:32,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:40:32,843 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 11 states. [2020-11-28 07:40:33,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:33,606 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-11-28 07:40:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-28 07:40:33,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-11-28 07:40:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:33,607 INFO L225 Difference]: With dead ends: 69 [2020-11-28 07:40:33,607 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:40:33,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-11-28 07:40:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:40:33,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:40:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:40:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:40:33,609 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-11-28 07:40:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:33,610 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:40:33,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 07:40:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:40:33,610 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:40:33,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:40:33,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:40:34,030 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2020-11-28 07:40:34,141 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 19 [2020-11-28 07:40:34,296 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-11-28 07:40:34,465 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 22 [2020-11-28 07:40:34,587 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,587 INFO L270 CegarLoopResult]: At program point L36-2(lines 36 38) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse1 (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0)) (.cse2 (<= .cse0 ULTIMATE.start_main_~k~0))) (or (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= .cse0 ULTIMATE.start_main_~j~0) .cse1 (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0) .cse2) (and (= ULTIMATE.start_main_~i~0 0) (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~j~0) .cse1 .cse2)))) [2020-11-28 07:40:34,587 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:40:34,587 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-11-28 07:40:34,587 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,587 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,588 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,588 INFO L274 CegarLoopResult]: For program point L12-4(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,588 INFO L274 CegarLoopResult]: For program point L12-6(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,588 INFO L274 CegarLoopResult]: For program point L12-7(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,588 INFO L274 CegarLoopResult]: For program point L12-8(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,588 INFO L274 CegarLoopResult]: For program point L12-10(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,588 INFO L274 CegarLoopResult]: For program point L12-11(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,588 INFO L274 CegarLoopResult]: For program point L29(lines 29 32) no Hoare annotation was computed. [2020-11-28 07:40:34,588 INFO L277 CegarLoopResult]: At program point L46(lines 24 48) the Hoare annotation is: true [2020-11-28 07:40:34,589 INFO L277 CegarLoopResult]: At program point L47(lines 24 48) the Hoare annotation is: true [2020-11-28 07:40:34,589 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,589 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:40:34,589 INFO L270 CegarLoopResult]: At program point L33-3(lines 33 45) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0)) (.cse1 (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0))) (or (and (= ULTIMATE.start_main_~i~0 0) .cse0 .cse1) (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) .cse0 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~j~0) .cse1))) [2020-11-28 07:40:34,589 INFO L270 CegarLoopResult]: At program point L34-2(lines 34 44) the Hoare annotation is: (let ((.cse0 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) (.cse1 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0)) (.cse2 (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0))) (or (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) .cse0 .cse1 .cse2) (let ((.cse3 (+ (div (+ ULTIMATE.start_main_~j~0 (- 1)) 2) 1))) (and (<= .cse3 0) .cse0 .cse1 (= ULTIMATE.start_main_~i~0 0) .cse2 (< .cse3 ULTIMATE.start_main_~n~0))))) [2020-11-28 07:40:34,590 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:40:34,590 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-28 07:40:34,590 INFO L270 CegarLoopResult]: At program point L18-2(lines 1 48) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_main_~i~0))) (and (<= .cse0 ULTIMATE.start_main_~j~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= (+ ULTIMATE.start_main_~k~0 1) ULTIMATE.start_main_~n~0) (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0) (<= .cse0 ULTIMATE.start_main_~k~0))) [2020-11-28 07:40:34,590 INFO L274 CegarLoopResult]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2020-11-28 07:40:34,590 INFO L270 CegarLoopResult]: At program point L18-5(lines 17 22) the Hoare annotation is: (and (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0) (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0) (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0)) [2020-11-28 07:40:34,591 INFO L274 CegarLoopResult]: For program point L18-6(lines 18 20) no Hoare annotation was computed. [2020-11-28 07:40:34,591 INFO L270 CegarLoopResult]: At program point L18-8(lines 1 48) the Hoare annotation is: (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0) (<= (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~n~0) (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~n~0)) [2020-11-28 07:40:34,591 INFO L274 CegarLoopResult]: For program point L35(lines 35 43) no Hoare annotation was computed. [2020-11-28 07:40:34,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:40:34 BoogieIcfgContainer [2020-11-28 07:40:34,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:40:34,632 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:40:34,632 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:40:34,632 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:40:34,632 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:29" (3/4) ... [2020-11-28 07:40:34,635 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:40:34,649 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-28 07:40:34,649 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-28 07:40:34,650 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:40:34,650 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:40:34,720 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6be7e7b9-695c-4f97-af95-86d1a384f87c/bin/utaipan/witness.graphml [2020-11-28 07:40:34,721 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:40:34,722 INFO L168 Benchmark]: Toolchain (without parser) took 6252.78 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 62.5 MB in the beginning and 90.4 MB in the end (delta: -27.9 MB). Peak memory consumption was 736.8 kB. Max. memory is 16.1 GB. [2020-11-28 07:40:34,722 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 69.2 MB. Free memory is still 34.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:40:34,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.88 ms. Allocated memory is still 92.3 MB. Free memory was 62.5 MB in the beginning and 68.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:34,723 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.13 ms. Allocated memory is still 92.3 MB. Free memory was 68.8 MB in the beginning and 67.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:40:34,724 INFO L168 Benchmark]: Boogie Preprocessor took 51.83 ms. Allocated memory is still 92.3 MB. Free memory was 67.2 MB in the beginning and 66.2 MB in the end (delta: 939.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:40:34,724 INFO L168 Benchmark]: RCFGBuilder took 590.30 ms. Allocated memory is still 92.3 MB. Free memory was 65.9 MB in the beginning and 48.1 MB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:34,724 INFO L168 Benchmark]: TraceAbstraction took 5088.70 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 47.5 MB in the beginning and 93.6 MB in the end (delta: -46.1 MB). Peak memory consumption was 47.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:34,725 INFO L168 Benchmark]: Witness Printer took 89.27 ms. Allocated memory is still 121.6 MB. Free memory was 93.6 MB in the beginning and 90.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:34,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 69.2 MB. Free memory is still 34.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 369.88 ms. Allocated memory is still 92.3 MB. Free memory was 62.5 MB in the beginning and 68.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.13 ms. Allocated memory is still 92.3 MB. Free memory was 68.8 MB in the beginning and 67.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.83 ms. Allocated memory is still 92.3 MB. Free memory was 67.2 MB in the beginning and 66.2 MB in the end (delta: 939.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 590.30 ms. Allocated memory is still 92.3 MB. Free memory was 65.9 MB in the beginning and 48.1 MB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5088.70 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 47.5 MB in the beginning and 93.6 MB in the end (delta: -46.1 MB). Peak memory consumption was 47.7 MB. Max. memory is 16.1 GB. * Witness Printer took 89.27 ms. Allocated memory is still 121.6 MB. Free memory was 93.6 MB in the beginning and 90.4 MB in the end (delta: 3.1 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: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: (((!(0 == cond) && 2 * i <= j) && n <= k) && j + 1 <= n) && k <= n - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: (((2 * i <= j && !(0 == cond)) && k + 1 <= n) && j + 1 <= n) && 2 * i <= k - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((!(0 == cond) && 2 * i <= j) && n <= k) && k <= n) || ((((((j + -1) / 2 + 1 <= 0 && 2 * i <= j) && n <= k) && i == 0) && k <= n) && (j + -1) / 2 + 1 < n) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((!(0 == cond) && 2 * i <= j) && j + 1 <= n) && k <= n) && 2 * i <= k) || (((i == 0 && k <= j) && j + 1 <= n) && 2 * i <= k) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((2 * i <= j && !(0 == cond)) && n <= k) && j + 1 <= n) && k <= n - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((i == 0 && n <= k) && k <= n) || (((!(0 == cond) && n <= k) && n <= j) && k <= n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 76 SDtfs, 185 SDslu, 90 SDs, 0 SdLazy, 295 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 47 NumberOfFragments, 185 HoareAnnotationTreeSize, 8 FomulaSimplifications, 6411 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2398 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 120 ConstructedInterpolants, 1 QuantifiedInterpolants, 5058 SizeOfPredicates, 9 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 8/15 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...