./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/freire2.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_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/freire2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/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 20d32d2c3ebf4b6346bc2a38a0b1f36e05f930cf ........................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/freire2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/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 20d32d2c3ebf4b6346bc2a38a0b1f36e05f930cf ............................................................................................................................................................................................................................................................................................................................................. 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 20:46:03,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:46:03,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:46:03,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:46:03,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:46:03,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:46:03,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:46:03,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:46:03,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:46:03,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:46:03,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:46:03,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:46:03,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:46:03,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:46:03,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:46:03,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:46:03,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:46:03,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:46:03,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:46:03,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:46:03,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:46:03,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:46:03,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:46:03,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:46:03,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:46:03,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:46:03,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:46:03,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:46:03,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:46:03,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:46:03,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:46:03,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:46:03,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:46:04,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:46:04,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:46:04,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:46:04,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:46:04,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:46:04,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:46:04,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:46:04,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:46:04,004 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 20:46:04,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:46:04,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:46:04,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:46:04,028 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:46:04,028 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:46:04,028 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:46:04,028 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:46:04,028 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:46:04,029 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:46:04,029 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:46:04,029 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:46:04,029 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:46:04,029 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:46:04,030 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:46:04,030 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:46:04,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:46:04,031 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:46:04,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:46:04,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:46:04,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:46:04,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:46:04,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:46:04,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:46:04,032 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:46:04,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:46:04,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:46:04,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:46:04,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:46:04,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:46:04,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:46:04,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:46:04,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:46:04,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:46:04,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:46:04,034 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:46:04,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:46:04,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:46:04,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:46:04,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:46:04,035 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_f9638eb0-c3f8-46d6-8d09-23d8062625db/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20d32d2c3ebf4b6346bc2a38a0b1f36e05f930cf [2020-12-09 20:46:04,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:46:04,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:46:04,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:46:04,249 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:46:04,249 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:46:04,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/../../sv-benchmarks/c/nla-digbench/freire2.c [2020-12-09 20:46:04,291 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/data/902ed5105/c15b5c44bc9c462da9131fa42d62e8b2/FLAG7b0623ce0 [2020-12-09 20:46:04,652 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:46:04,652 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/sv-benchmarks/c/nla-digbench/freire2.c [2020-12-09 20:46:04,657 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/data/902ed5105/c15b5c44bc9c462da9131fa42d62e8b2/FLAG7b0623ce0 [2020-12-09 20:46:04,666 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/data/902ed5105/c15b5c44bc9c462da9131fa42d62e8b2 [2020-12-09 20:46:04,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:46:04,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:46:04,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:46:04,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:46:04,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:46:04,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2455d275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04, skipping insertion in model container [2020-12-09 20:46:04,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:46:04,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:46:04,785 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_f9638eb0-c3f8-46d6-8d09-23d8062625db/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2020-12-09 20:46:04,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:46:04,808 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:46:04,817 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_f9638eb0-c3f8-46d6-8d09-23d8062625db/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2020-12-09 20:46:04,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:46:04,834 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:46:04,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04 WrapperNode [2020-12-09 20:46:04,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:46:04,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:46:04,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:46:04,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:46:04,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:46:04,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:46:04,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:46:04,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:46:04,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (1/1) ... [2020-12-09 20:46:04,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:46:04,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:46:04,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:46:04,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:46:04,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/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 20:46:04,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:46:04,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:46:04,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:46:04,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:46:05,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:46:05,148 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-09 20:46:05,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:46:05 BoogieIcfgContainer [2020-12-09 20:46:05,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:46:05,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:46:05,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:46:05,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:46:05,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:46:04" (1/3) ... [2020-12-09 20:46:05,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fbd94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:46:05, skipping insertion in model container [2020-12-09 20:46:05,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:04" (2/3) ... [2020-12-09 20:46:05,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fbd94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:46:05, skipping insertion in model container [2020-12-09 20:46:05,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:46:05" (3/3) ... [2020-12-09 20:46:05,155 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2.c [2020-12-09 20:46:05,165 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:46:05,167 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 20:46:05,174 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 20:46:05,191 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:46:05,191 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:46:05,192 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:46:05,192 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:46:05,192 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:46:05,192 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:46:05,192 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:46:05,192 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:46:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-09 20:46:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 20:46:05,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:46:05,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 20:46:05,206 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:46:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:46:05,210 INFO L82 PathProgramCache]: Analyzing trace with hash 3585941, now seen corresponding path program 1 times [2020-12-09 20:46:05,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:46:05,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889552899] [2020-12-09 20:46:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:46:05,281 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:46:05,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552596029] [2020-12-09 20:46:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/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 20:46:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:46:05,336 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:46:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:46:05,348 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:46:05,371 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 20:46:05,372 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:46:05,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 20:46:05,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:46:05 BoogieIcfgContainer [2020-12-09 20:46:05,587 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:46:05,587 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:46:05,587 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:46:05,588 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:46:05,588 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:46:05" (3/4) ... [2020-12-09 20:46:05,590 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 20:46:05,590 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:46:05,592 INFO L168 Benchmark]: Toolchain (without parser) took 922.14 ms. Allocated memory is still 102.8 MB. Free memory was 80.4 MB in the beginning and 51.5 MB in the end (delta: 28.9 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2020-12-09 20:46:05,593 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 67.1 MB. Free memory was 42.6 MB in the beginning and 42.6 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:46:05,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.02 ms. Allocated memory is still 102.8 MB. Free memory was 80.0 MB in the beginning and 69.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:46:05,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.37 ms. Allocated memory is still 102.8 MB. Free memory was 69.6 MB in the beginning and 67.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:46:05,595 INFO L168 Benchmark]: Boogie Preprocessor took 17.83 ms. Allocated memory is still 102.8 MB. Free memory was 67.9 MB in the beginning and 66.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:46:05,595 INFO L168 Benchmark]: RCFGBuilder took 270.18 ms. Allocated memory is still 102.8 MB. Free memory was 66.7 MB in the beginning and 69.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 20:46:05,596 INFO L168 Benchmark]: TraceAbstraction took 436.08 ms. Allocated memory is still 102.8 MB. Free memory was 69.7 MB in the beginning and 51.5 MB in the end (delta: 18.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 20:46:05,596 INFO L168 Benchmark]: Witness Printer took 3.23 ms. Allocated memory is still 102.8 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:46:05,600 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 67.1 MB. Free memory was 42.6 MB in the beginning and 42.6 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 165.02 ms. Allocated memory is still 102.8 MB. Free memory was 80.0 MB in the beginning and 69.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.37 ms. Allocated memory is still 102.8 MB. Free memory was 69.6 MB in the beginning and 67.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.83 ms. Allocated memory is still 102.8 MB. Free memory was 67.9 MB in the beginning and 66.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 270.18 ms. Allocated memory is still 102.8 MB. Free memory was 66.7 MB in the beginning and 69.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 436.08 ms. Allocated memory is still 102.8 MB. Free memory was 69.7 MB in the beginning and 51.5 MB in the end (delta: 18.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Witness Printer took 3.23 ms. Allocated memory is still 102.8 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] x = a [L29] s = 3.25 [L30] r = 1 [L32] COND TRUE 1 [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:46:07,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:46:07,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:46:07,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:46:07,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:46:07,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:46:07,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:46:07,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:46:07,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:46:07,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:46:07,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:46:07,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:46:07,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:46:07,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:46:07,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:46:07,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:46:07,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:46:07,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:46:07,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:46:07,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:46:07,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:46:07,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:46:07,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:46:07,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:46:07,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:46:07,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:46:07,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:46:07,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:46:07,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:46:07,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:46:07,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:46:07,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:46:07,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:46:07,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:46:07,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:46:07,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:46:07,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:46:07,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:46:07,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:46:07,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:46:07,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:46:07,189 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 20:46:07,215 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:46:07,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:46:07,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:46:07,216 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:46:07,216 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:46:07,216 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:46:07,217 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:46:07,217 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:46:07,217 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:46:07,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:46:07,218 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:46:07,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:46:07,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:46:07,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:46:07,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:46:07,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:46:07,218 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:46:07,219 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 20:46:07,219 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 20:46:07,219 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:46:07,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:46:07,219 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:46:07,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:46:07,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:46:07,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 20:46:07,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:46:07,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:46:07,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:46:07,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:46:07,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:46:07,220 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 20:46:07,221 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 20:46:07,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:46:07,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:46:07,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:46:07,221 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_f9638eb0-c3f8-46d6-8d09-23d8062625db/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20d32d2c3ebf4b6346bc2a38a0b1f36e05f930cf [2020-12-09 20:46:07,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:46:07,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:46:07,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:46:07,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:46:07,460 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:46:07,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/../../sv-benchmarks/c/nla-digbench/freire2.c [2020-12-09 20:46:07,502 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/data/bca7aa85e/af4834df9c134f998de13163445a953d/FLAG7aeafcd33 [2020-12-09 20:46:07,861 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:46:07,862 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/sv-benchmarks/c/nla-digbench/freire2.c [2020-12-09 20:46:07,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/data/bca7aa85e/af4834df9c134f998de13163445a953d/FLAG7aeafcd33 [2020-12-09 20:46:07,875 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/data/bca7aa85e/af4834df9c134f998de13163445a953d [2020-12-09 20:46:07,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:46:07,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:46:07,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:46:07,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:46:07,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:46:07,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:46:07" (1/1) ... [2020-12-09 20:46:07,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64829328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:07, skipping insertion in model container [2020-12-09 20:46:07,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:46:07" (1/1) ... [2020-12-09 20:46:07,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:46:07,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:46:07,994 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_f9638eb0-c3f8-46d6-8d09-23d8062625db/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2020-12-09 20:46:08,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:46:08,029 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:46:08,044 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_f9638eb0-c3f8-46d6-8d09-23d8062625db/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2020-12-09 20:46:08,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:46:08,070 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:46:08,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08 WrapperNode [2020-12-09 20:46:08,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:46:08,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:46:08,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:46:08,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:46:08,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (1/1) ... [2020-12-09 20:46:08,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (1/1) ... [2020-12-09 20:46:08,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:46:08,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:46:08,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:46:08,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:46:08,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (1/1) ... [2020-12-09 20:46:08,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (1/1) ... [2020-12-09 20:46:08,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (1/1) ... [2020-12-09 20:46:08,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (1/1) ... [2020-12-09 20:46:08,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (1/1) ... [2020-12-09 20:46:08,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (1/1) ... [2020-12-09 20:46:08,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (1/1) ... [2020-12-09 20:46:08,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:46:08,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:46:08,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:46:08,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:46:08,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/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 20:46:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 20:46:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:46:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:46:08,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:46:22,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:46:22,112 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-09 20:46:22,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:46:22 BoogieIcfgContainer [2020-12-09 20:46:22,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:46:22,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:46:22,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:46:22,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:46:22,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:46:07" (1/3) ... [2020-12-09 20:46:22,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550e0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:46:22, skipping insertion in model container [2020-12-09 20:46:22,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:46:08" (2/3) ... [2020-12-09 20:46:22,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550e0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:46:22, skipping insertion in model container [2020-12-09 20:46:22,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:46:22" (3/3) ... [2020-12-09 20:46:22,120 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2.c [2020-12-09 20:46:22,130 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:46:22,132 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 20:46:22,140 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 20:46:22,156 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:46:22,156 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:46:22,156 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:46:22,156 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:46:22,156 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:46:22,156 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:46:22,156 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:46:22,156 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:46:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-12-09 20:46:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:46:22,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:46:22,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:46:22,169 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:46:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:46:22,173 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2020-12-09 20:46:22,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:46:22,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334603543] [2020-12-09 20:46:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 20:46:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:46:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:46:22,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:46:22,491 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 20:46:22,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:46:22,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334603543] [2020-12-09 20:46:22,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:46:22,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:46:22,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648425160] [2020-12-09 20:46:22,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:46:22,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:46:22,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:46:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:46:22,508 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-12-09 20:46:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:46:44,079 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-12-09 20:46:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:46:44,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-09 20:46:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:46:44,087 INFO L225 Difference]: With dead ends: 63 [2020-12-09 20:46:44,088 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 20:46:44,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:46:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 20:46:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-09 20:46:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 20:46:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-09 20:46:44,116 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 5 [2020-12-09 20:46:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:46:44,116 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-09 20:46:44,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:46:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-09 20:46:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:46:44,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:46:44,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:46:44,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 20:46:44,320 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:46:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:46:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1810815341, now seen corresponding path program 1 times [2020-12-09 20:46:44,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:46:44,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691249702] [2020-12-09 20:46:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 20:46:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:46:45,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:46:45,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:46:45,441 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-09 20:47:04,074 WARN L197 SmtUtils]: Spent 6.72 s on a formula simplification. DAG size of input: 18 DAG size of output: 7 [2020-12-09 20:47:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:47:04,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:47:04,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691249702] [2020-12-09 20:47:04,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:47:04,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:47:04,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955056988] [2020-12-09 20:47:04,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:47:04,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:47:04,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:47:04,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=10, Unknown=2, NotChecked=0, Total=20 [2020-12-09 20:47:04,081 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 5 states. [2020-12-09 20:47:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:47:28,922 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-09 20:47:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:47:28,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 20:47:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:47:28,924 INFO L225 Difference]: With dead ends: 32 [2020-12-09 20:47:28,924 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 20:47:28,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=13, Invalid=15, Unknown=2, NotChecked=0, Total=30 [2020-12-09 20:47:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 20:47:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-09 20:47:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 20:47:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-09 20:47:28,930 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 7 [2020-12-09 20:47:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:47:28,930 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-09 20:47:28,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:47:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-09 20:47:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:47:28,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:47:28,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:47:29,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 20:47:29,132 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:47:29,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:47:29,134 INFO L82 PathProgramCache]: Analyzing trace with hash 731943696, now seen corresponding path program 1 times [2020-12-09 20:47:29,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:47:29,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960445201] [2020-12-09 20:47:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 20:47:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:47:30,527 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:48:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:48:10,474 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:48:10,690 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 20:48:10,690 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:48:10,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 20:48:10,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:48:10 BoogieIcfgContainer [2020-12-09 20:48:10,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:48:10,914 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:48:10,914 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:48:10,914 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:48:10,914 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:46:22" (3/4) ... [2020-12-09 20:48:10,915 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 20:48:10,940 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f9638eb0-c3f8-46d6-8d09-23d8062625db/bin/utaipan/witness.graphml [2020-12-09 20:48:10,940 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:48:10,941 INFO L168 Benchmark]: Toolchain (without parser) took 123062.44 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 36.0 MB in the beginning and 35.9 MB in the end (delta: 75.5 kB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2020-12-09 20:48:10,941 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 39.1 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:48:10,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.46 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 39.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 20:48:10,942 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.55 ms. Allocated memory is still 56.6 MB. Free memory was 38.8 MB in the beginning and 37.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:48:10,942 INFO L168 Benchmark]: Boogie Preprocessor took 24.17 ms. Allocated memory is still 56.6 MB. Free memory was 37.2 MB in the beginning and 35.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:48:10,943 INFO L168 Benchmark]: RCFGBuilder took 13988.85 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 35.7 MB in the beginning and 56.5 MB in the end (delta: -20.8 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:48:10,943 INFO L168 Benchmark]: TraceAbstraction took 108798.38 ms. Allocated memory is still 77.6 MB. Free memory was 55.9 MB in the beginning and 37.9 MB in the end (delta: 18.0 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. [2020-12-09 20:48:10,944 INFO L168 Benchmark]: Witness Printer took 26.50 ms. Allocated memory is still 77.6 MB. Free memory was 37.9 MB in the beginning and 35.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:48:10,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 39.1 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.46 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 39.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.55 ms. Allocated memory is still 56.6 MB. Free memory was 38.8 MB in the beginning and 37.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.17 ms. Allocated memory is still 56.6 MB. Free memory was 37.2 MB in the beginning and 35.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 13988.85 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 35.7 MB in the beginning and 56.5 MB in the end (delta: -20.8 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 108798.38 ms. Allocated memory is still 77.6 MB. Free memory was 55.9 MB in the beginning and 37.9 MB in the end (delta: 18.0 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. * Witness Printer took 26.50 ms. Allocated memory is still 77.6 MB. Free memory was 37.9 MB in the beginning and 35.9 MB in the end (delta: 2.0 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: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] x = a [L29] s = 3.25 [L30] r = 1 [L32] COND TRUE 1 [L17] COND FALSE !(!(cond)) [L17] COND FALSE !(!(cond)) [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 108.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 46.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 28 SDslu, 34 SDs, 0 SdLazy, 76 SolverSat, 8 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 45.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 19.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 342 SizeOfPredicates, 10 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 12 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...