./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V --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 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:09:37,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:09:37,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:09:37,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:09:37,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:09:37,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:09:37,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:09:37,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:09:37,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:09:37,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:09:37,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:09:37,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:09:37,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:09:37,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:09:37,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:09:37,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:09:37,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:09:37,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:09:37,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:09:37,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:09:37,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:09:37,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:09:37,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:09:37,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:09:37,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:09:37,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:09:37,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:09:37,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:09:37,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:09:37,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:09:37,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:09:37,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:09:37,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:09:37,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:09:37,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:09:37,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:09:37,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:09:37,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:09:37,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:09:37,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:09:37,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:09:37,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:09:37,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:09:37,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:09:37,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:09:37,751 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:09:37,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:09:37,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:09:37,753 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:09:37,753 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:09:37,753 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:09:37,754 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:09:37,755 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:09:37,755 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:09:37,755 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:09:37,756 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:09:37,756 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:09:37,756 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:09:37,756 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:09:37,757 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:09:37,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:09:37,758 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:09:37,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:09:37,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:09:37,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:09:37,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:09:37,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:09:37,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:09:37,759 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:09:37,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:09:37,760 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:09:37,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:09:37,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:09:37,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:09:37,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:09:37,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:09:37,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:09:37,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:09:37,762 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:09:37,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:09:37,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:09:37,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:09:37,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:09:37,763 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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b [2021-11-23 03:09:38,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:09:38,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:09:38,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:09:38,103 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:09:38,103 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:09:38,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c [2021-11-23 03:09:38,187 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/data/ae5383516/f87fe6c82bfe47fbada2e14442a8f1f3/FLAG0aa5434c2 [2021-11-23 03:09:38,705 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:09:38,706 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c [2021-11-23 03:09:38,717 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/data/ae5383516/f87fe6c82bfe47fbada2e14442a8f1f3/FLAG0aa5434c2 [2021-11-23 03:09:39,018 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/data/ae5383516/f87fe6c82bfe47fbada2e14442a8f1f3 [2021-11-23 03:09:39,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:09:39,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:09:39,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:09:39,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:09:39,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:09:39,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60d9fb59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39, skipping insertion in model container [2021-11-23 03:09:39,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:09:39,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:09:39,365 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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2021-11-23 03:09:39,371 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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2021-11-23 03:09:39,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:09:39,427 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:09:39,445 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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2021-11-23 03:09:39,447 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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2021-11-23 03:09:39,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:09:39,497 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:09:39,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39 WrapperNode [2021-11-23 03:09:39,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:09:39,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:09:39,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:09:39,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:09:39,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,583 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 169 [2021-11-23 03:09:39,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:09:39,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:09:39,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:09:39,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:09:39,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:09:39,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:09:39,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:09:39,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:09:39,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (1/1) ... [2021-11-23 03:09:39,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:09:39,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:39,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:09:39,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:09:39,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:09:39,759 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-23 03:09:39,759 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-23 03:09:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:09:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:09:39,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:09:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:09:39,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:09:39,844 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:09:39,846 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:09:40,285 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:09:40,456 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:09:40,464 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:09:40,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:09:40 BoogieIcfgContainer [2021-11-23 03:09:40,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:09:40,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:09:40,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:09:40,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:09:40,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:09:39" (1/3) ... [2021-11-23 03:09:40,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe9c939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:09:40, skipping insertion in model container [2021-11-23 03:09:40,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:39" (2/3) ... [2021-11-23 03:09:40,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe9c939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:09:40, skipping insertion in model container [2021-11-23 03:09:40,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:09:40" (3/3) ... [2021-11-23 03:09:40,484 INFO L111 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_1-2a.c.cil.c [2021-11-23 03:09:40,493 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:09:40,493 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 03:09:40,571 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:09:40,582 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 [2021-11-23 03:09:40,582 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 03:09:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 42 states have internal predecessors, (59), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 03:09:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:09:40,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:40,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:09:40,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:40,633 INFO L85 PathProgramCache]: Analyzing trace with hash 9849864, now seen corresponding path program 1 times [2021-11-23 03:09:40,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:40,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394569657] [2021-11-23 03:09:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:40,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:09:40,855 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:09:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:09:40,904 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:09:40,906 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:09:40,908 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-23 03:09:40,912 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-23 03:09:40,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:09:40,918 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-23 03:09:40,922 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:09:40,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:09:40 BoogieIcfgContainer [2021-11-23 03:09:40,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:09:40,953 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:09:40,954 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:09:40,954 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:09:40,955 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:09:40" (3/4) ... [2021-11-23 03:09:40,958 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 03:09:40,958 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:09:40,961 INFO L158 Benchmark]: Toolchain (without parser) took 1936.43ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 62.0MB in the beginning and 99.7MB in the end (delta: -37.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:09:40,962 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 96.5MB. Free memory was 65.8MB in the beginning and 65.7MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:09:40,965 INFO L158 Benchmark]: CACSL2BoogieTranslator took 473.19ms. Allocated memory is still 96.5MB. Free memory was 61.6MB in the beginning and 69.3MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:09:40,966 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.48ms. Allocated memory is still 96.5MB. Free memory was 69.3MB in the beginning and 67.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:09:40,972 INFO L158 Benchmark]: Boogie Preprocessor took 83.33ms. Allocated memory is still 96.5MB. Free memory was 67.3MB in the beginning and 65.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:09:40,973 INFO L158 Benchmark]: RCFGBuilder took 798.74ms. Allocated memory is still 96.5MB. Free memory was 65.6MB in the beginning and 43.5MB in the end (delta: 22.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-23 03:09:40,974 INFO L158 Benchmark]: TraceAbstraction took 478.77ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 43.1MB in the beginning and 100.3MB in the end (delta: -57.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:09:40,975 INFO L158 Benchmark]: Witness Printer took 5.35ms. Allocated memory is still 127.9MB. Free memory is still 99.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:09:40,984 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 96.5MB. Free memory was 65.8MB in the beginning and 65.7MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 473.19ms. Allocated memory is still 96.5MB. Free memory was 61.6MB in the beginning and 69.3MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 84.48ms. Allocated memory is still 96.5MB. Free memory was 69.3MB in the beginning and 67.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 83.33ms. Allocated memory is still 96.5MB. Free memory was 67.3MB in the beginning and 65.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 798.74ms. Allocated memory is still 96.5MB. Free memory was 65.6MB in the beginning and 43.5MB in the end (delta: 22.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 478.77ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 43.1MB in the beginning and 100.3MB in the end (delta: -57.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.35ms. Allocated memory is still 127.9MB. Free memory is still 99.7MB. 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: 48]: 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 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] 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] [L47] COND TRUE !(result >= 0.0f && result < 1.39844f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, 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=51occurred 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, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 03:09:41,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V --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 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:09:43,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:09:43,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:09:43,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:09:43,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:09:43,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:09:43,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:09:43,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:09:43,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:09:43,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:09:43,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:09:43,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:09:43,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:09:43,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:09:43,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:09:43,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:09:43,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:09:43,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:09:43,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:09:43,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:09:43,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:09:43,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:09:43,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:09:43,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:09:43,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:09:43,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:09:43,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:09:43,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:09:43,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:09:43,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:09:43,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:09:43,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:09:43,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:09:43,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:09:43,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:09:43,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:09:43,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:09:43,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:09:43,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:09:43,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:09:43,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:09:43,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 03:09:43,906 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:09:43,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:09:43,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:09:43,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:09:43,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:09:43,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:09:43,907 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:09:43,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:09:43,908 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:09:43,908 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:09:43,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:09:43,908 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:09:43,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:09:43,910 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:09:43,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:09:43,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:09:43,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:09:43,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:09:43,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:09:43,911 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:09:43,911 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:09:43,911 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:09:43,911 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:09:43,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:09:43,911 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:09:43,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:09:43,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:09:43,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:09:43,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:09:43,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:09:43,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:09:43,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:09:43,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:09:43,913 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:09:43,913 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:09:43,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:09:43,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:09:43,913 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:09:43,914 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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b [2021-11-23 03:09:44,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:09:44,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:09:44,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:09:44,390 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:09:44,391 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:09:44,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c [2021-11-23 03:09:44,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/data/0b3a6b118/7027c650285941f8af7eccde12119274/FLAG458d903e9 [2021-11-23 03:09:45,159 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:09:45,161 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c [2021-11-23 03:09:45,176 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/data/0b3a6b118/7027c650285941f8af7eccde12119274/FLAG458d903e9 [2021-11-23 03:09:45,447 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/data/0b3a6b118/7027c650285941f8af7eccde12119274 [2021-11-23 03:09:45,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:09:45,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:09:45,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:09:45,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:09:45,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:09:45,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d51b76d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45, skipping insertion in model container [2021-11-23 03:09:45,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:09:45,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:09:45,759 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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2021-11-23 03:09:45,768 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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2021-11-23 03:09:45,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:09:45,868 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:09:45,901 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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2021-11-23 03:09:45,907 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_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2021-11-23 03:09:45,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:09:45,989 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:09:45,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45 WrapperNode [2021-11-23 03:09:45,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:09:45,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:09:45,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:09:45,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:09:46,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:46,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:46,070 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 165 [2021-11-23 03:09:46,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:09:46,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:09:46,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:09:46,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:09:46,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:46,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:46,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:46,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:46,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:46,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:46,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:46,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:09:46,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:09:46,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:09:46,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:09:46,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:46,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:09:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:46,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:09:46,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:09:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:09:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 03:09:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-23 03:09:46,251 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-23 03:09:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:09:46,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:09:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:09:46,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:09:46,332 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:09:46,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:09:48,969 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:09:48,978 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:09:48,978 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:09:48,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:09:48 BoogieIcfgContainer [2021-11-23 03:09:48,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:09:48,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:09:48,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:09:48,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:09:48,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:09:45" (1/3) ... [2021-11-23 03:09:48,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13120ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:09:48, skipping insertion in model container [2021-11-23 03:09:48,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (2/3) ... [2021-11-23 03:09:48,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13120ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:09:48, skipping insertion in model container [2021-11-23 03:09:48,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:09:48" (3/3) ... [2021-11-23 03:09:48,990 INFO L111 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_1-2a.c.cil.c [2021-11-23 03:09:48,996 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:09:48,997 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 03:09:49,060 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:09:49,068 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 [2021-11-23 03:09:49,068 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 03:09:49,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 03:09:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:09:49,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:49,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:49,094 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:49,100 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-23 03:09:49,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:09:49,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112127367] [2021-11-23 03:09:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:49,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:09:49,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:09:49,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:09:49,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:09:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 03:09:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:49,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:49,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:09:49,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112127367] [2021-11-23 03:09:49,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112127367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:09:49,733 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:09:49,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 03:09:49,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412368233] [2021-11-23 03:09:49,736 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:49,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:09:49,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:09:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:09:49,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:09:49,790 INFO L87 Difference]: Start difference. First operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-23 03:09:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:49,847 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2021-11-23 03:09:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:09:49,850 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-23 03:09:49,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:49,883 INFO L225 Difference]: With dead ends: 157 [2021-11-23 03:09:49,883 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 03:09:49,888 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 [2021-11-23 03:09:49,892 INFO L933 BasicCegarLoop]: 116 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, 116 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 [2021-11-23 03:09:49,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:09:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 03:09:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-23 03:09:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 65 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 03:09:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2021-11-23 03:09:49,958 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 7 [2021-11-23 03:09:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:49,959 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2021-11-23 03:09:49,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-23 03:09:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2021-11-23 03:09:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:09:49,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:49,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:49,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:50,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:09:50,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-23 03:09:50,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:09:50,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285588627] [2021-11-23 03:09:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:50,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:09:50,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:09:50,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:09:50,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1fb9f0d-103f-467e-a8f1-bbba548d6a41/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process