./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/square_4.i --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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/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 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:58:35,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:58:35,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:58:35,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:58:35,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:58:35,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:58:35,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:58:35,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:58:35,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:58:35,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:58:35,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:58:35,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:58:35,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:58:35,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:58:35,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:58:35,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:58:35,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:58:35,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:58:35,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:58:35,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:58:35,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:58:35,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:58:35,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:58:35,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:58:35,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:58:35,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:58:35,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:58:35,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:58:35,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:58:35,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:58:35,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:58:35,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:58:35,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:58:35,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:58:35,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:58:35,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:58:35,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:58:35,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:58:35,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:58:35,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:58:35,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:58:35,557 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:58:35,599 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:58:35,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:58:35,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:58:35,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:58:35,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:58:35,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:58:35,610 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:58:35,610 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:58:35,610 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:58:35,611 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:58:35,612 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:58:35,612 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:58:35,613 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:58:35,613 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:58:35,613 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:58:35,613 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:58:35,614 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:58:35,614 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:58:35,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:58:35,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:58:35,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:58:35,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:58:35,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:58:35,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:58:35,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:58:35,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:58:35,618 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:58:35,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:58:35,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:58:35,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:58:35,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:58:35,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:58:35,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:58:35,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:58:35,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:58:35,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:58:35,621 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:58:35,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:58:35,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:58:35,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:58:35,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:58:35,622 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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 [2021-11-21 00:58:35,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:58:35,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:58:35,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:58:35,937 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:58:35,937 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:58:35,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/floats-cdfpl/square_4.i [2021-11-21 00:58:36,018 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/data/9edb34162/918a8e3233b340168d8a7c3cb6620146/FLAG8ab0a86ad [2021-11-21 00:58:36,553 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:58:36,554 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/sv-benchmarks/c/floats-cdfpl/square_4.i [2021-11-21 00:58:36,565 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/data/9edb34162/918a8e3233b340168d8a7c3cb6620146/FLAG8ab0a86ad [2021-11-21 00:58:36,901 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/data/9edb34162/918a8e3233b340168d8a7c3cb6620146 [2021-11-21 00:58:36,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:58:36,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:58:36,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:58:36,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:58:36,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:58:36,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476e41b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36, skipping insertion in model container [2021-11-21 00:58:36,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:58:36,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:58:37,139 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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2021-11-21 00:58:37,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:58:37,152 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:58:37,172 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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2021-11-21 00:58:37,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:58:37,190 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:58:37,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37 WrapperNode [2021-11-21 00:58:37,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:58:37,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:58:37,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:58:37,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:58:37,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (1/1) ... [2021-11-21 00:58:37,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (1/1) ... [2021-11-21 00:58:37,227 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2021-11-21 00:58:37,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:58:37,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:58:37,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:58:37,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:58:37,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (1/1) ... [2021-11-21 00:58:37,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (1/1) ... [2021-11-21 00:58:37,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (1/1) ... [2021-11-21 00:58:37,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (1/1) ... [2021-11-21 00:58:37,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (1/1) ... [2021-11-21 00:58:37,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (1/1) ... [2021-11-21 00:58:37,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (1/1) ... [2021-11-21 00:58:37,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:58:37,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:58:37,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:58:37,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:58:37,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (1/1) ... [2021-11-21 00:58:37,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:58:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:37,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:58:37,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:58:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:58:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:58:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:58:37,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:58:37,427 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:58:37,428 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:58:37,542 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:58:37,593 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:58:37,593 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:58:37,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:58:37 BoogieIcfgContainer [2021-11-21 00:58:37,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:58:37,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:58:37,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:58:37,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:58:37,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:58:36" (1/3) ... [2021-11-21 00:58:37,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ab8577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:58:37, skipping insertion in model container [2021-11-21 00:58:37,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:37" (2/3) ... [2021-11-21 00:58:37,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ab8577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:58:37, skipping insertion in model container [2021-11-21 00:58:37,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:58:37" (3/3) ... [2021-11-21 00:58:37,606 INFO L111 eAbstractionObserver]: Analyzing ICFG square_4.i [2021-11-21 00:58:37,612 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:58:37,612 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:58:37,674 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:58:37,684 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 00:58:37,685 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:58:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:58:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 00:58:37,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:37,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 00:58:37,716 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash 56123, now seen corresponding path program 1 times [2021-11-21 00:58:37,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:37,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820682712] [2021-11-21 00:58:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:37,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:58:37,852 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:58:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:58:37,898 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:58:37,900 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:58:37,902 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:58:37,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:58:37,913 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-21 00:58:37,916 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:58:37,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:58:37 BoogieIcfgContainer [2021-11-21 00:58:37,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:58:37,947 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:58:37,947 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:58:37,948 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:58:37,949 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:58:37" (3/4) ... [2021-11-21 00:58:37,952 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 00:58:37,953 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:58:37,955 INFO L158 Benchmark]: Toolchain (without parser) took 1048.22ms. Allocated memory is still 96.5MB. Free memory was 61.0MB in the beginning and 47.0MB in the end (delta: 14.1MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2021-11-21 00:58:37,956 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 96.5MB. Free memory was 66.0MB in the beginning and 65.9MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:58:37,958 INFO L158 Benchmark]: CACSL2BoogieTranslator took 283.78ms. Allocated memory is still 96.5MB. Free memory was 60.7MB in the beginning and 71.9MB in the end (delta: -11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:58:37,959 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.30ms. Allocated memory is still 96.5MB. Free memory was 71.9MB in the beginning and 70.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:58:37,960 INFO L158 Benchmark]: Boogie Preprocessor took 35.06ms. Allocated memory is still 96.5MB. Free memory was 70.4MB in the beginning and 69.4MB in the end (delta: 964.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:58:37,966 INFO L158 Benchmark]: RCFGBuilder took 330.31ms. Allocated memory is still 96.5MB. Free memory was 69.4MB in the beginning and 60.2MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:58:37,968 INFO L158 Benchmark]: TraceAbstraction took 345.75ms. Allocated memory is still 96.5MB. Free memory was 59.8MB in the beginning and 47.3MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 00:58:37,970 INFO L158 Benchmark]: Witness Printer took 5.76ms. Allocated memory is still 96.5MB. Free memory was 47.3MB in the beginning and 47.0MB in the end (delta: 361.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:58:37,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 96.5MB. Free memory was 66.0MB in the beginning and 65.9MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 283.78ms. Allocated memory is still 96.5MB. Free memory was 60.7MB in the beginning and 71.9MB in the end (delta: -11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.30ms. Allocated memory is still 96.5MB. Free memory was 71.9MB in the beginning and 70.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.06ms. Allocated memory is still 96.5MB. Free memory was 70.4MB in the beginning and 69.4MB in the end (delta: 964.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 330.31ms. Allocated memory is still 96.5MB. Free memory was 69.4MB in the beginning and 60.2MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 345.75ms. Allocated memory is still 96.5MB. Free memory was 59.8MB in the beginning and 47.3MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 5.76ms. Allocated memory is still 96.5MB. Free memory was 47.3MB in the beginning and 47.0MB in the end (delta: 361.5kB). There was no memory consumed. 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: 38]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L29] float IN = __VERIFIER_nondet_float(); [L30] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L24] COND FALSE !(!cond) [L30] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L32] float x = IN; [L34-L35] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L37] COND TRUE !(result >= 0.0f && result < 1.39844f) VAL [IN=49, x=49] [L38] reach_error() VAL [IN=49, x=49] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-21 00:58:38,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/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 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:58:40,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:58:40,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:58:40,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:58:40,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:58:40,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:58:40,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:58:40,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:58:40,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:58:40,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:58:40,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:58:40,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:58:40,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:58:40,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:58:40,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:58:40,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:58:40,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:58:40,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:58:40,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:58:40,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:58:40,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:58:40,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:58:40,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:58:40,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:58:40,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:58:40,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:58:40,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:58:40,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:58:40,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:58:40,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:58:40,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:58:40,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:58:40,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:58:40,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:58:40,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:58:40,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:58:40,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:58:40,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:58:40,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:58:40,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:58:40,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:58:40,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:58:40,688 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:58:40,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:58:40,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:58:40,689 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:58:40,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:58:40,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:58:40,691 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:58:40,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:58:40,691 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:58:40,691 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:58:40,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:58:40,693 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:58:40,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:58:40,694 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:58:40,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:58:40,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:58:40,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:58:40,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:58:40,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:58:40,696 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:58:40,696 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:58:40,696 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:58:40,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:58:40,696 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:58:40,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:58:40,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:58:40,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:58:40,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:58:40,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:58:40,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:58:40,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:58:40,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:58:40,698 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:58:40,699 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:58:40,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:58:40,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:58:40,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:58:40,700 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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 [2021-11-21 00:58:41,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:58:41,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:58:41,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:58:41,115 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:58:41,116 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:58:41,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/floats-cdfpl/square_4.i [2021-11-21 00:58:41,198 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/data/0bfff0e47/4c33c254227140039c95a2aabe78adc0/FLAG620cff334 [2021-11-21 00:58:41,792 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:58:41,793 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/sv-benchmarks/c/floats-cdfpl/square_4.i [2021-11-21 00:58:41,800 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/data/0bfff0e47/4c33c254227140039c95a2aabe78adc0/FLAG620cff334 [2021-11-21 00:58:42,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/data/0bfff0e47/4c33c254227140039c95a2aabe78adc0 [2021-11-21 00:58:42,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:58:42,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:58:42,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:58:42,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:58:42,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:58:42,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f497691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42, skipping insertion in model container [2021-11-21 00:58:42,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:58:42,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:58:42,393 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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2021-11-21 00:58:42,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:58:42,414 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:58:42,433 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_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2021-11-21 00:58:42,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:58:42,448 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:58:42,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42 WrapperNode [2021-11-21 00:58:42,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:58:42,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:58:42,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:58:42,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:58:42,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,482 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2021-11-21 00:58:42,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:58:42,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:58:42,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:58:42,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:58:42,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:58:42,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:58:42,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:58:42,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:58:42,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (1/1) ... [2021-11-21 00:58:42,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:58:42,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:42,564 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:58:42,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:58:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:58:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:58:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:58:42,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:58:42,703 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:58:42,705 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:58:44,905 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:58:44,911 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:58:44,912 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:58:44,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:58:44 BoogieIcfgContainer [2021-11-21 00:58:44,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:58:44,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:58:44,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:58:44,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:58:44,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:58:42" (1/3) ... [2021-11-21 00:58:44,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5b7801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:58:44, skipping insertion in model container [2021-11-21 00:58:44,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:42" (2/3) ... [2021-11-21 00:58:44,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5b7801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:58:44, skipping insertion in model container [2021-11-21 00:58:44,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:58:44" (3/3) ... [2021-11-21 00:58:44,923 INFO L111 eAbstractionObserver]: Analyzing ICFG square_4.i [2021-11-21 00:58:44,929 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:58:44,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:58:44,977 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:58:44,985 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 00:58:44,991 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:58:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:58:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:58:45,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:45,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:58:45,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:45,026 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-11-21 00:58:45,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:58:45,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951328134] [2021-11-21 00:58:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:45,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:58:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:58:45,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:58:45,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:58:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:45,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:58:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:45,851 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 00:58:45,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:58:45,879 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 00:58:45,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:58:45,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951328134] [2021-11-21 00:58:45,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951328134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:58:45,881 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:58:45,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:58:45,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616115572] [2021-11-21 00:58:45,885 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:58:45,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:58:45,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:58:45,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:58:45,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:58:45,921 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:58:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:45,935 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-21 00:58:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:58:45,937 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 00:58:45,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:45,945 INFO L225 Difference]: With dead ends: 19 [2021-11-21 00:58:45,945 INFO L226 Difference]: Without dead ends: 7 [2021-11-21 00:58:45,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 00:58:45,952 INFO L933 BasicCegarLoop]: 10 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, 10 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 00:58:45,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:58:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-21 00:58:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-21 00:58:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:58:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-11-21 00:58:45,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-11-21 00:58:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:45,984 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-11-21 00:58:45,984 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:58:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-11-21 00:58:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:58:45,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:45,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:58:46,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:46,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:58:46,190 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:46,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-11-21 00:58:46,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:58:46,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743997584] [2021-11-21 00:58:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:46,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:58:46,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:58:46,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:58:46,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2b42b8e-0ba6-44e4-a94f-8d148d1922d9/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process