./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/freire2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P --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 9d48d3286a6f586125e0a7b49e6e6eb72f0f43db8d452bf9a67ba40cbad4d2bf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:09:56,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:09:56,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:09:56,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:09:56,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:09:56,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:09:56,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:09:56,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:09:56,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:09:56,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:09:56,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:09:56,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:09:56,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:09:56,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:09:56,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:09:56,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:09:56,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:09:56,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:09:56,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:09:56,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:09:56,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:09:56,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:09:56,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:09:56,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:09:56,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:09:56,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:09:56,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:09:56,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:09:56,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:09:56,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:09:56,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:09:56,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:09:56,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:09:56,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:09:56,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:09:56,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:09:56,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:09:56,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:09:56,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:09:56,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:09:56,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:09:56,892 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:09:56,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:09:56,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:09:56,922 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:09:56,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:09:56,923 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:09:56,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:09:56,924 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:09:56,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:09:56,924 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:09:56,924 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:09:56,925 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:09:56,925 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:09:56,925 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:09:56,925 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:09:56,926 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:09:56,926 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:09:56,926 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:09:56,926 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:09:56,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:09:56,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:09:56,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:09:56,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:09:56,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:09:56,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:09:56,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:09:56,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:09:56,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:09:56,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:09:56,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:09:56,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:09:56,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:09:56,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:09:56,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:09:56,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:09:56,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:09:56,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:09:56,932 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:09:56,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:09:56,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:09:56,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:09:56,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:09:56,933 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_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d48d3286a6f586125e0a7b49e6e6eb72f0f43db8d452bf9a67ba40cbad4d2bf [2021-11-21 01:09:57,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:09:57,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:09:57,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:09:57,256 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:09:57,257 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:09:57,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench/freire2.c [2021-11-21 01:09:57,340 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/data/9ce451c69/19fd9f7708314bdfbe0ac7bcbf5fe94e/FLAG0ebe566a8 [2021-11-21 01:09:57,793 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:09:57,794 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/sv-benchmarks/c/nla-digbench/freire2.c [2021-11-21 01:09:57,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/data/9ce451c69/19fd9f7708314bdfbe0ac7bcbf5fe94e/FLAG0ebe566a8 [2021-11-21 01:09:58,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/data/9ce451c69/19fd9f7708314bdfbe0ac7bcbf5fe94e [2021-11-21 01:09:58,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:09:58,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:09:58,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:09:58,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:09:58,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:09:58,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa8ae7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58, skipping insertion in model container [2021-11-21 01:09:58,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:09:58,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:09:58,427 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2021-11-21 01:09:58,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:09:58,483 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:09:58,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2021-11-21 01:09:58,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:09:58,543 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:09:58,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58 WrapperNode [2021-11-21 01:09:58,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:09:58,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:09:58,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:09:58,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:09:58,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,603 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2021-11-21 01:09:58,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:09:58,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:09:58,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:09:58,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:09:58,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:09:58,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:09:58,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:09:58,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:09:58,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (1/1) ... [2021-11-21 01:09:58,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:09:58,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:09:58,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:09:58,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:09:58,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:09:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:09:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:09:58,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:09:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:09:58,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:09:58,810 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:09:58,812 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:09:58,925 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:09:58,942 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:09:58,942 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:09:58,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:09:58 BoogieIcfgContainer [2021-11-21 01:09:58,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:09:58,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:09:58,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:09:58,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:09:58,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:09:58" (1/3) ... [2021-11-21 01:09:58,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5696f16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:09:58, skipping insertion in model container [2021-11-21 01:09:58,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:58" (2/3) ... [2021-11-21 01:09:58,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5696f16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:09:58, skipping insertion in model container [2021-11-21 01:09:58,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:09:58" (3/3) ... [2021-11-21 01:09:58,956 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2.c [2021-11-21 01:09:58,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:09:58,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:09:59,019 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:09:59,028 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:09:59,028 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:09:59,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:09:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:09:59,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:59,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:09:59,054 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:59,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:59,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1836971371, now seen corresponding path program 1 times [2021-11-21 01:09:59,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:59,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216127724] [2021-11-21 01:09:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:59,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:59,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:59,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216127724] [2021-11-21 01:09:59,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216127724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:09:59,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:09:59,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:09:59,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978055321] [2021-11-21 01:09:59,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:09:59,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:09:59,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:09:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:09:59,253 INFO L87 Difference]: Start difference. First operand has 17 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:59,286 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2021-11-21 01:09:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:09:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:09:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:59,299 INFO L225 Difference]: With dead ends: 33 [2021-11-21 01:09:59,299 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 01:09:59,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:09:59,308 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:09:59,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:09:59,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 01:09:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-21 01:09:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:09:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2021-11-21 01:09:59,352 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 6 [2021-11-21 01:09:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:59,353 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2021-11-21 01:09:59,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2021-11-21 01:09:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:09:59,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:59,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:09:59,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:09:59,355 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1878708562, now seen corresponding path program 1 times [2021-11-21 01:09:59,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:59,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020054219] [2021-11-21 01:09:59,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:59,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:59,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:09:59,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275369625] [2021-11-21 01:09:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:59,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:09:59,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:09:59,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:09:59,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:09:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:09:59,502 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:09:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:09:59,531 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:09:59,532 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:09:59,534 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:09:59,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:09:59,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:09:59,761 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-21 01:09:59,764 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:09:59,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:09:59 BoogieIcfgContainer [2021-11-21 01:09:59,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:09:59,788 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:09:59,788 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:09:59,788 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:09:59,789 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:09:58" (3/4) ... [2021-11-21 01:09:59,803 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 01:09:59,803 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:09:59,804 INFO L158 Benchmark]: Toolchain (without parser) took 1610.04ms. Allocated memory is still 102.8MB. Free memory was 61.9MB in the beginning and 39.7MB in the end (delta: 22.1MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. [2021-11-21 01:09:59,805 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 102.8MB. Free memory is still 77.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:09:59,814 INFO L158 Benchmark]: CACSL2BoogieTranslator took 348.77ms. Allocated memory is still 102.8MB. Free memory was 61.7MB in the beginning and 77.4MB in the end (delta: -15.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:09:59,817 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.37ms. Allocated memory is still 102.8MB. Free memory was 77.4MB in the beginning and 76.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:09:59,819 INFO L158 Benchmark]: Boogie Preprocessor took 35.42ms. Allocated memory is still 102.8MB. Free memory was 75.8MB in the beginning and 74.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:09:59,820 INFO L158 Benchmark]: RCFGBuilder took 304.35ms. Allocated memory is still 102.8MB. Free memory was 74.5MB in the beginning and 64.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:09:59,821 INFO L158 Benchmark]: TraceAbstraction took 839.40ms. Allocated memory is still 102.8MB. Free memory was 64.5MB in the beginning and 40.2MB in the end (delta: 24.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-21 01:09:59,823 INFO L158 Benchmark]: Witness Printer took 15.47ms. Allocated memory is still 102.8MB. Free memory was 40.1MB in the beginning and 39.7MB in the end (delta: 419.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:09:59,826 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 102.8MB. Free memory is still 77.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 348.77ms. Allocated memory is still 102.8MB. Free memory was 61.7MB in the beginning and 77.4MB in the end (delta: -15.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.37ms. Allocated memory is still 102.8MB. Free memory was 77.4MB in the beginning and 76.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.42ms. Allocated memory is still 102.8MB. Free memory was 75.8MB in the beginning and 74.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 304.35ms. Allocated memory is still 102.8MB. Free memory was 74.5MB in the beginning and 64.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 839.40ms. Allocated memory is still 102.8MB. Free memory was 64.5MB in the beginning and 40.2MB in the end (delta: 24.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 15.47ms. Allocated memory is still 102.8MB. Free memory was 40.1MB in the beginning and 39.7MB in the end (delta: 419.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 VAL [a=2, r=1, s=13/4, x=2] [L32] COND TRUE 1 VAL [a=2, r=1, s=13/4, x=2] [L33] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 20 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2 IncrementalHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 20 mSDtfsCounter, 2 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2021-11-21 01:09:59,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/freire2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P --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 9d48d3286a6f586125e0a7b49e6e6eb72f0f43db8d452bf9a67ba40cbad4d2bf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:10:02,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:10:02,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:10:02,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:10:02,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:10:02,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:10:02,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:10:02,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:10:02,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:10:02,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:10:02,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:10:02,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:10:02,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:10:02,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:10:02,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:10:02,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:10:02,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:10:02,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:10:02,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:10:02,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:10:02,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:10:02,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:10:02,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:10:02,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:10:02,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:10:02,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:10:02,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:10:02,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:10:02,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:10:02,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:10:02,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:10:02,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:10:02,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:10:02,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:10:02,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:10:02,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:10:02,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:10:02,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:10:02,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:10:02,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:10:02,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:10:02,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 01:10:02,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:10:02,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:10:02,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:10:02,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:10:02,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:10:02,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:10:02,765 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:10:02,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:10:02,766 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:10:02,766 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:10:02,767 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:10:02,767 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:10:02,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:10:02,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:10:02,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:10:02,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:10:02,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:10:02,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:10:02,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:10:02,770 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:10:02,771 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:10:02,771 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:10:02,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:10:02,772 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:10:02,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:10:02,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:10:02,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:10:02,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:10:02,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:10:02,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:10:02,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:10:02,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:10:02,774 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:10:02,774 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:10:02,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:10:02,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:10:02,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:10:02,775 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_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d48d3286a6f586125e0a7b49e6e6eb72f0f43db8d452bf9a67ba40cbad4d2bf [2021-11-21 01:10:03,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:10:03,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:10:03,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:10:03,212 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:10:03,213 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:10:03,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench/freire2.c [2021-11-21 01:10:03,301 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/data/a71aced12/546df37fb9a144a6acd9bbc4bbb0407f/FLAGd97004bc3 [2021-11-21 01:10:03,942 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:10:03,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/sv-benchmarks/c/nla-digbench/freire2.c [2021-11-21 01:10:03,954 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/data/a71aced12/546df37fb9a144a6acd9bbc4bbb0407f/FLAGd97004bc3 [2021-11-21 01:10:04,305 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/data/a71aced12/546df37fb9a144a6acd9bbc4bbb0407f [2021-11-21 01:10:04,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:10:04,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:10:04,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:10:04,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:10:04,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:10:04,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653c8887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04, skipping insertion in model container [2021-11-21 01:10:04,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:10:04,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:10:04,505 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2021-11-21 01:10:04,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:10:04,540 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:10:04,554 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2021-11-21 01:10:04,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:10:04,580 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:10:04,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04 WrapperNode [2021-11-21 01:10:04,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:10:04,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:10:04,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:10:04,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:10:04,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,618 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2021-11-21 01:10:04,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:10:04,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:10:04,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:10:04,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:10:04,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:10:04,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:10:04,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:10:04,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:10:04,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (1/1) ... [2021-11-21 01:10:04,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:10:04,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:10:04,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:10:04,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:10:04,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:10:04,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:10:04,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:10:04,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:10:04,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:10:04,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:10:04,813 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:10:04,815 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:10:07,256 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:10:07,263 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:10:07,263 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:10:07,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:10:07 BoogieIcfgContainer [2021-11-21 01:10:07,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:10:07,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:10:07,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:10:07,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:10:07,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:10:04" (1/3) ... [2021-11-21 01:10:07,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a8b5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:10:07, skipping insertion in model container [2021-11-21 01:10:07,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:04" (2/3) ... [2021-11-21 01:10:07,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a8b5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:10:07, skipping insertion in model container [2021-11-21 01:10:07,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:10:07" (3/3) ... [2021-11-21 01:10:07,287 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2.c [2021-11-21 01:10:07,292 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:10:07,293 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:10:07,360 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:10:07,373 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:10:07,373 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:10:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:10:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:10:07,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:07,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:07,421 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:07,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1820892643, now seen corresponding path program 1 times [2021-11-21 01:10:07,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:10:07,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569542304] [2021-11-21 01:10:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:07,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:10:07,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:10:07,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:10:07,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:10:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:07,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:10:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:10:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:07,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:10:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:07,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:10:07,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569542304] [2021-11-21 01:10:07,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569542304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:10:07,667 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:10:07,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:10:07,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791818446] [2021-11-21 01:10:07,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:07,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:10:07,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:10:07,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:10:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:10:07,702 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:07,721 INFO L93 Difference]: Finished difference Result 38 states and 60 transitions. [2021-11-21 01:10:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:10:07,723 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:10:07,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:07,730 INFO L225 Difference]: With dead ends: 38 [2021-11-21 01:10:07,730 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 01:10:07,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:10:07,738 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:07,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:10:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 01:10:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-21 01:10:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:10:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-11-21 01:10:07,774 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 7 [2021-11-21 01:10:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:07,775 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-11-21 01:10:07,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:07,775 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-11-21 01:10:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:10:07,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:07,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:07,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:10:07,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:10:07,990 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:07,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:07,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1811478687, now seen corresponding path program 1 times [2021-11-21 01:10:07,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:10:07,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232023514] [2021-11-21 01:10:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:07,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:10:07,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:10:07,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:10:08,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:10:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:08,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:10:08,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:10:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:08,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:10:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:15,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:10:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232023514] [2021-11-21 01:10:15,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232023514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:10:15,997 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:10:15,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-21 01:10:15,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660392856] [2021-11-21 01:10:15,998 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:15,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:10:16,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:10:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:10:16,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:10:16,001 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:18,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:25,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:27,683 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:29,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:32,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:35,123 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:37,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:38,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:40,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:42,681 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:46,270 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:48,275 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:50,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:52,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:10:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:52,604 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-11-21 01:10:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:10:52,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:10:52,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:52,720 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:10:52,720 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 01:10:52,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:10:52,723 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:52,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 91 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 32.8s Time] [2021-11-21 01:10:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 01:10:52,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-11-21 01:10:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 01:10:52,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-21 01:10:52,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 7 [2021-11-21 01:10:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:52,738 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-21 01:10:52,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:52,738 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-21 01:10:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:10:52,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:52,739 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:52,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:10:52,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:10:52,941 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:52,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:52,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1549807104, now seen corresponding path program 1 times [2021-11-21 01:10:52,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:10:52,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908775012] [2021-11-21 01:10:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:52,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:10:52,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:10:52,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:10:52,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:10:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:54,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:10:54,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:10:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:56,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:11:03,077 WARN L838 $PredicateComparison]: unable to prove that (= (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvneg (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (_ bv6 32)) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from false [2021-11-21 01:11:05,113 WARN L860 $PredicateComparison]: unable to prove that (= (bvadd (bvmul (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvneg (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (_ bv6 32)) |c_ULTIMATE.start_main_~r~0#1|)) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from true [2021-11-21 01:11:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:28,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:11:28,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908775012] [2021-11-21 01:11:28,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908775012] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:11:28,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:11:28,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2021-11-21 01:11:28,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933901437] [2021-11-21 01:11:28,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:28,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:11:28,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:11:28,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:11:28,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=56, Unknown=2, NotChecked=14, Total=90 [2021-11-21 01:11:28,781 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:11:32,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:11:35,888 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:11:38,243 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:11:38,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:38,243 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-21 01:11:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:11:38,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-21 01:11:38,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:38,363 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:11:38,364 INFO L226 Difference]: Without dead ends: 27 [2021-11-21 01:11:38,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=22, Invalid=70, Unknown=2, NotChecked=16, Total=110 [2021-11-21 01:11:38,366 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:38,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 58 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 3 Unknown, 30 Unchecked, 7.7s Time] [2021-11-21 01:11:38,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-21 01:11:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-21 01:11:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 01:11:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-11-21 01:11:38,379 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 12 [2021-11-21 01:11:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:38,379 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-11-21 01:11:38,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:11:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-11-21 01:11:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:11:38,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:38,381 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:38,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:11:38,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:11:38,598 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash 888915199, now seen corresponding path program 1 times [2021-11-21 01:11:38,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:11:38,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295560197] [2021-11-21 01:11:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:38,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:11:38,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:11:38,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:11:38,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:11:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:11:45,553 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:11:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:11:47,150 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-21 01:11:47,150 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:11:47,152 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:11:47,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:11:47,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:11:47,358 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-21 01:11:47,361 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:11:47,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:11:47 BoogieIcfgContainer [2021-11-21 01:11:47,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:11:47,391 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:11:47,391 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:11:47,391 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:11:47,392 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:10:07" (3/4) ... [2021-11-21 01:11:47,394 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-21 01:11:47,455 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 01:11:47,455 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:11:47,456 INFO L158 Benchmark]: Toolchain (without parser) took 103147.90ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 26.4MB in the beginning and 31.1MB in the end (delta: -4.7MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2021-11-21 01:11:47,457 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 50.3MB. Free memory was 31.4MB in the beginning and 31.3MB in the end (delta: 38.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:11:47,457 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.82ms. Allocated memory is still 50.3MB. Free memory was 26.2MB in the beginning and 28.3MB in the end (delta: -2.1MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2021-11-21 01:11:47,458 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.12ms. Allocated memory is still 50.3MB. Free memory was 28.3MB in the beginning and 26.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:11:47,458 INFO L158 Benchmark]: Boogie Preprocessor took 27.48ms. Allocated memory is still 50.3MB. Free memory was 26.6MB in the beginning and 25.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:11:47,460 INFO L158 Benchmark]: RCFGBuilder took 2618.61ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 25.4MB in the beginning and 37.3MB in the end (delta: -11.9MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2021-11-21 01:11:47,464 INFO L158 Benchmark]: TraceAbstraction took 100122.44ms. Allocated memory is still 60.8MB. Free memory was 36.7MB in the beginning and 33.1MB in the end (delta: 3.6MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. [2021-11-21 01:11:47,465 INFO L158 Benchmark]: Witness Printer took 64.75ms. Allocated memory is still 60.8MB. Free memory was 33.1MB in the beginning and 31.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:11:47,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 50.3MB. Free memory was 31.4MB in the beginning and 31.3MB in the end (delta: 38.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.82ms. Allocated memory is still 50.3MB. Free memory was 26.2MB in the beginning and 28.3MB in the end (delta: -2.1MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.12ms. Allocated memory is still 50.3MB. Free memory was 28.3MB in the beginning and 26.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.48ms. Allocated memory is still 50.3MB. Free memory was 26.6MB in the beginning and 25.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 2618.61ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 25.4MB in the beginning and 37.3MB in the end (delta: -11.9MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * TraceAbstraction took 100122.44ms. Allocated memory is still 60.8MB. Free memory was 36.7MB in the beginning and 33.1MB in the end (delta: 3.6MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. * Witness Printer took 64.75ms. Allocated memory is still 60.8MB. Free memory was 33.1MB in the beginning and 31.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 VAL [a=0.10416666666666682, r=1, s=3.25, x=0.10416666666666682] [L32] COND TRUE 1 VAL [a=0.10416666666666682, r=1, s=3.25, x=0.10416666666666682] [L33] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L33] RET __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [a=0.10416666666666682, r=1, s=3.25, x=0.10416666666666682] [L34] CALL __VERIFIER_assert(((4*r*r*r - 6*r*r + 3*r) + (int)(4*x - 4*a)) == 1) VAL [\old(cond)=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L34] RET __VERIFIER_assert(((4*r*r*r - 6*r*r + 3*r) + (int)(4*x - 4*a)) == 1) VAL [a=0.10416666666666682, r=1, s=3.25, x=0.10416666666666682] [L35] CALL __VERIFIER_assert((int)(8*r*s - 24*a + 16*r - 12*s + 24*x - 3 == 0)) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 100.0s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 46.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 16 mSolverCounterUnknown, 24 SdHoareTripleChecker+Valid, 40.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 174 SdHoareTripleChecker+Invalid, 40.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 30 IncrementalHoareTripleChecker+Unchecked, 113 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 30 IncrementalHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 61 mSDtfsCounter, 30 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 29.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=2, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 8.2s SatisfiabilityAnalysisTime, 42.7s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 46 ConstructedInterpolants, 1 QuantifiedInterpolants, 284 SizeOfPredicates, 5 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 2/4 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! [2021-11-21 01:11:47,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_833c0dfe-74c6-4ac0-a0f8-38fff0d60c9e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE