./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/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 faea21126d1b7451c89543ab57ac45d6b42bc205 .......................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 12:00:57,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:00:57,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:00:57,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:00:57,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:00:57,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:00:57,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:00:57,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:00:57,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:00:57,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:00:57,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:00:57,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:00:57,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:00:57,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:00:57,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:00:57,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:00:57,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:00:57,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:00:57,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:00:57,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:00:57,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:00:57,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:00:57,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:00:57,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:00:57,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:00:57,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:00:57,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:00:57,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:00:57,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:00:57,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:00:57,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:00:57,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:00:57,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:00:57,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:00:57,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:00:57,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:00:57,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:00:57,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:00:57,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:00:57,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:00:57,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:00:57,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 12:00:57,986 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:00:57,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:00:57,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:00:57,987 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:00:57,987 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:00:57,987 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:00:57,988 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:00:57,988 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:00:57,988 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:00:57,988 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:00:57,988 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:00:57,988 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:00:57,988 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:00:57,988 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:00:57,988 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:00:57,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:00:57,989 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:00:57,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:00:57,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:00:57,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:00:57,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:00:57,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:00:57,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:00:57,990 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:00:57,990 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:00:57,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:00:57,990 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:00:57,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:00:57,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:00:57,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:00:57,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:00:57,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:00:57,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:00:57,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:00:57,991 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:00:57,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:00:57,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:00:57,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:00:57,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:00:57,992 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_64befbee-6579-44c9-b648-01a708b0c3df/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faea21126d1b7451c89543ab57ac45d6b42bc205 [2020-12-09 12:00:58,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:00:58,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:00:58,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:00:58,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:00:58,204 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:00:58,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c [2020-12-09 12:00:58,249 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/data/a26370eba/2633966e55334ad7818564404b1183b2/FLAGa570a416a [2020-12-09 12:00:58,623 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:00:58,623 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c [2020-12-09 12:00:58,629 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/data/a26370eba/2633966e55334ad7818564404b1183b2/FLAGa570a416a [2020-12-09 12:00:58,641 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/data/a26370eba/2633966e55334ad7818564404b1183b2 [2020-12-09 12:00:58,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:00:58,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:00:58,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:00:58,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:00:58,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:00:58,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138cc63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58, skipping insertion in model container [2020-12-09 12:00:58,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:00:58,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:00:58,768 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c[458,471] [2020-12-09 12:00:58,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:00:58,791 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:00:58,801 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c[458,471] [2020-12-09 12:00:58,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:00:58,818 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:00:58,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58 WrapperNode [2020-12-09 12:00:58,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:00:58,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:00:58,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:00:58,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:00:58,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:00:58,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:00:58,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:00:58,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:00:58,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (1/1) ... [2020-12-09 12:00:58,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:00:58,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:00:58,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:00:58,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:00:58,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:00:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:00:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:00:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:00:58,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:00:59,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:00:59,111 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 12:00:59,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:00:59 BoogieIcfgContainer [2020-12-09 12:00:59,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:00:59,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:00:59,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:00:59,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:00:59,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:00:58" (1/3) ... [2020-12-09 12:00:59,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208744cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:00:59, skipping insertion in model container [2020-12-09 12:00:59,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:00:58" (2/3) ... [2020-12-09 12:00:59,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208744cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:00:59, skipping insertion in model container [2020-12-09 12:00:59,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:00:59" (3/3) ... [2020-12-09 12:00:59,121 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound1.c [2020-12-09 12:00:59,134 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:00:59,137 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 12:00:59,148 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 12:00:59,167 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:00:59,167 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:00:59,167 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:00:59,167 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:00:59,167 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:00:59,167 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:00:59,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:00:59,168 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:00:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-09 12:00:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 12:00:59,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:00:59,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 12:00:59,184 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:00:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:00:59,189 INFO L82 PathProgramCache]: Analyzing trace with hash 81490399, now seen corresponding path program 1 times [2020-12-09 12:00:59,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:00:59,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230298451] [2020-12-09 12:00:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:00:59,288 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:00:59,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575644945] [2020-12-09 12:00:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:00:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:00:59,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 12:00:59,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:00:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:00:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:01:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:01:55,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230298451] [2020-12-09 12:01:55,540 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:01:55,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575644945] [2020-12-09 12:01:55,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:01:55,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 12:01:55,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645190384] [2020-12-09 12:01:55,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:01:55,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:01:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:01:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2020-12-09 12:01:55,559 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2020-12-09 12:02:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:02:21,894 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-12-09 12:02:21,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 12:02:21,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 12:02:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:02:21,901 INFO L225 Difference]: With dead ends: 51 [2020-12-09 12:02:21,901 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 12:02:21,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.4s TimeCoverageRelationStatistics Valid=23, Invalid=30, Unknown=3, NotChecked=0, Total=56 [2020-12-09 12:02:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 12:02:21,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-12-09 12:02:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 12:02:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-09 12:02:21,933 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 5 [2020-12-09 12:02:21,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:02:21,933 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-09 12:02:21,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:02:21,933 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-09 12:02:21,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 12:02:21,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:02:21,934 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:02:22,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 12:02:22,137 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:02:22,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:02:22,139 INFO L82 PathProgramCache]: Analyzing trace with hash 908273882, now seen corresponding path program 1 times [2020-12-09 12:02:22,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:02:22,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077547941] [2020-12-09 12:02:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:02:22,154 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:02:22,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549617691] [2020-12-09 12:02:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:02:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:02:22,180 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:02:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:02:22,188 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:02:22,206 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 12:02:22,206 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:02:22,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:02:22,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:02:22 BoogieIcfgContainer [2020-12-09 12:02:22,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:02:22,462 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:02:22,462 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:02:22,462 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:02:22,463 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:00:59" (3/4) ... [2020-12-09 12:02:22,464 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 12:02:22,493 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_64befbee-6579-44c9-b648-01a708b0c3df/bin/utaipan/witness.graphml [2020-12-09 12:02:22,493 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:02:22,495 INFO L168 Benchmark]: Toolchain (without parser) took 83848.81 ms. Allocated memory is still 96.5 MB. Free memory was 56.9 MB in the beginning and 50.9 MB in the end (delta: 6.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:02:22,495 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 73.0 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:02:22,495 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.15 ms. Allocated memory is still 96.5 MB. Free memory was 56.7 MB in the beginning and 73.0 MB in the end (delta: -16.3 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:02:22,496 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.11 ms. Allocated memory is still 96.5 MB. Free memory was 73.0 MB in the beginning and 71.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:02:22,496 INFO L168 Benchmark]: Boogie Preprocessor took 18.18 ms. Allocated memory is still 96.5 MB. Free memory was 71.6 MB in the beginning and 70.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:02:22,497 INFO L168 Benchmark]: RCFGBuilder took 249.27 ms. Allocated memory is still 96.5 MB. Free memory was 70.6 MB in the beginning and 67.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 12:02:22,497 INFO L168 Benchmark]: TraceAbstraction took 83346.82 ms. Allocated memory is still 96.5 MB. Free memory was 67.3 MB in the beginning and 53.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-12-09 12:02:22,497 INFO L168 Benchmark]: Witness Printer took 31.22 ms. Allocated memory is still 96.5 MB. Free memory was 53.0 MB in the beginning and 50.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:02:22,500 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 96.5 MB. Free memory was 73.1 MB in the beginning and 73.0 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 172.15 ms. Allocated memory is still 96.5 MB. Free memory was 56.7 MB in the beginning and 73.0 MB in the end (delta: -16.3 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.11 ms. Allocated memory is still 96.5 MB. Free memory was 73.0 MB in the beginning and 71.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.18 ms. Allocated memory is still 96.5 MB. Free memory was 71.6 MB in the beginning and 70.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 249.27 ms. Allocated memory is still 96.5 MB. Free memory was 70.6 MB in the beginning and 67.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 83346.82 ms. Allocated memory is still 96.5 MB. Free memory was 67.3 MB in the beginning and 53.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * Witness Printer took 31.22 ms. Allocated memory is still 96.5 MB. Free memory was 53.0 MB in the beginning and 50.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<1 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND FALSE !(counter++<1) [L10] COND TRUE !(cond) VAL [counter=2] [L12] reach_error() VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 83.2s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 26.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 25 SDslu, 43 SDs, 0 SdLazy, 30 SolverSat, 12 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 56.2s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 244 SizeOfPredicates, 3 NumberOfNonLiveVariables, 53 ConjunctsInSsa, 10 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 incorrect! Received shutdown request...