./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 dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:36:46,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:36:46,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:36:46,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:36:46,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:36:46,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:36:46,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:36:46,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:36:46,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:36:46,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:36:46,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:36:46,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:36:46,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:36:46,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:36:46,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:36:46,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:36:46,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:36:46,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:36:46,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:36:46,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:36:46,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:36:46,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:36:46,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:36:46,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:36:46,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:36:46,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:36:46,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:36:46,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:36:46,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:36:46,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:36:46,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:36:46,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:36:46,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:36:46,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:36:46,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:36:46,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:36:46,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:36:46,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:36:46,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:36:46,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:36:46,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:36:46,716 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:36:46,742 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:36:46,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:36:46,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:36:46,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:36:46,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:36:46,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:36:46,748 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:36:46,748 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:36:46,748 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:36:46,748 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:36:46,748 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:36:46,749 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:36:46,749 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:36:46,750 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:36:46,750 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:36:46,750 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:36:46,750 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:36:46,751 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:36:46,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:36:46,752 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:36:46,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:36:46,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:36:46,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:36:46,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:36:46,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:36:46,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:36:46,754 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:36:46,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:36:46,755 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:36:46,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:36:46,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:36:46,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:36:46,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:46,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:36:46,756 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:36:46,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:36:46,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:36:46,758 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:36:46,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:36:46,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:36:46,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:36:46,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 [2022-10-17 17:36:47,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:36:47,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:36:47,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:36:47,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:36:47,132 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:36:47,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/floats-cdfpl/square_4.i [2022-10-17 17:36:47,201 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/data/616bf42fe/52333fba558b463495aa834c5c3de8a7/FLAGa81d50ea4 [2022-10-17 17:36:47,685 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:36:47,686 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/sv-benchmarks/c/floats-cdfpl/square_4.i [2022-10-17 17:36:47,693 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/data/616bf42fe/52333fba558b463495aa834c5c3de8a7/FLAGa81d50ea4 [2022-10-17 17:36:48,070 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/data/616bf42fe/52333fba558b463495aa834c5c3de8a7 [2022-10-17 17:36:48,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:36:48,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:36:48,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:48,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:36:48,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:36:48,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@781785b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48, skipping insertion in model container [2022-10-17 17:36:48,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:36:48,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:36:48,359 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_82780cfc-1991-45fa-98a5-d2dc6457ce3b/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2022-10-17 17:36:48,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:48,371 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:36:48,386 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_82780cfc-1991-45fa-98a5-d2dc6457ce3b/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2022-10-17 17:36:48,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:48,400 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:36:48,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48 WrapperNode [2022-10-17 17:36:48,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:48,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:48,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:36:48,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:36:48,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,433 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2022-10-17 17:36:48,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:48,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:36:48,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:36:48,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:36:48,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,452 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:36:48,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:36:48,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:36:48,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:36:48,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (1/1) ... [2022-10-17 17:36:48,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:48,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:48,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:36:48,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:36:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:36:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:36:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:36:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:36:48,605 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:36:48,607 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:36:48,735 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:36:48,801 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:36:48,801 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:36:48,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:48 BoogieIcfgContainer [2022-10-17 17:36:48,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:36:48,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:36:48,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:36:48,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:36:48,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:36:48" (1/3) ... [2022-10-17 17:36:48,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795f1ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:48, skipping insertion in model container [2022-10-17 17:36:48,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:48" (2/3) ... [2022-10-17 17:36:48,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795f1ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:48, skipping insertion in model container [2022-10-17 17:36:48,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:48" (3/3) ... [2022-10-17 17:36:48,822 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4.i [2022-10-17 17:36:48,848 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:36:48,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:36:48,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:36:48,932 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@57c4df2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:36:48,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:36:48,938 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) [2022-10-17 17:36:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 17:36:48,944 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:48,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 17:36:48,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:48,951 INFO L85 PathProgramCache]: Analyzing trace with hash 56123, now seen corresponding path program 1 times [2022-10-17 17:36:48,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:48,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208872261] [2022-10-17 17:36:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:36:49,065 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:36:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:36:49,102 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:36:49,104 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:36:49,105 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 17:36:49,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:36:49,112 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 17:36:49,116 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 17:36:49,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 05:36:49 BoogieIcfgContainer [2022-10-17 17:36:49,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 17:36:49,146 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 17:36:49,146 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 17:36:49,146 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 17:36:49,147 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:48" (3/4) ... [2022-10-17 17:36:49,151 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-10-17 17:36:49,151 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 17:36:49,154 INFO L158 Benchmark]: Toolchain (without parser) took 1075.63ms. Allocated memory is still 92.3MB. Free memory was 56.0MB in the beginning and 41.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2022-10-17 17:36:49,155 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:36:49,156 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.81ms. Allocated memory is still 92.3MB. Free memory was 55.7MB in the beginning and 68.2MB in the end (delta: -12.4MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2022-10-17 17:36:49,157 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.25ms. Allocated memory is still 92.3MB. Free memory was 68.2MB in the beginning and 66.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:36:49,158 INFO L158 Benchmark]: Boogie Preprocessor took 20.11ms. Allocated memory is still 92.3MB. Free memory was 66.7MB in the beginning and 65.7MB in the end (delta: 922.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:36:49,164 INFO L158 Benchmark]: RCFGBuilder took 349.10ms. Allocated memory is still 92.3MB. Free memory was 65.7MB in the beginning and 55.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-10-17 17:36:49,165 INFO L158 Benchmark]: TraceAbstraction took 336.16ms. Allocated memory is still 92.3MB. Free memory was 54.9MB in the beginning and 41.6MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-10-17 17:36:49,167 INFO L158 Benchmark]: Witness Printer took 6.00ms. Allocated memory is still 92.3MB. Free memory was 41.6MB in the beginning and 41.3MB in the end (delta: 250.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:36:49,176 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 319.81ms. Allocated memory is still 92.3MB. Free memory was 55.7MB in the beginning and 68.2MB in the end (delta: -12.4MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.25ms. Allocated memory is still 92.3MB. Free memory was 68.2MB in the beginning and 66.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.11ms. Allocated memory is still 92.3MB. Free memory was 66.7MB in the beginning and 65.7MB in the end (delta: 922.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 349.10ms. Allocated memory is still 92.3MB. Free memory was 65.7MB in the beginning and 55.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 336.16ms. Allocated memory is still 92.3MB. Free memory was 54.9MB in the beginning and 41.6MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 6.00ms. Allocated memory is still 92.3MB. Free memory was 41.6MB in the beginning and 41.3MB in the end (delta: 250.3kB). 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=53, x=53] [L37] COND TRUE !(result >= 0.0f && result < 1.39844f) VAL [IN=53, x=53] [L38] reach_error() VAL [IN=53, x=53] - 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, 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 [2022-10-17 17:36:49,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/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_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:36:51,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:36:51,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:36:51,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:36:51,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:36:51,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:36:51,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:36:51,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:36:51,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:36:51,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:36:51,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:36:51,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:36:51,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:36:51,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:36:51,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:36:51,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:36:51,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:36:51,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:36:51,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:36:51,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:36:51,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:36:51,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:36:51,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:36:51,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:36:51,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:36:51,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:36:51,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:36:51,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:36:51,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:36:51,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:36:51,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:36:51,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:36:51,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:36:51,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:36:51,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:36:51,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:36:51,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:36:51,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:36:51,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:36:51,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:36:51,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:36:51,867 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-10-17 17:36:51,917 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:36:51,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:36:51,918 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:36:51,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:36:51,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:36:51,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:36:51,921 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:36:51,921 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:36:51,921 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:36:51,921 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:36:51,922 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:36:51,923 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:36:51,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:36:51,925 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:36:51,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:36:51,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:36:51,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:36:51,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:36:51,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:36:51,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:36:51,926 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 17:36:51,926 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 17:36:51,927 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:36:51,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:36:51,927 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:36:51,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:36:51,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:36:51,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 17:36:51,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:36:51,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:51,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:36:51,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:36:51,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:36:51,930 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-10-17 17:36:51,930 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 17:36:51,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:36:51,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:36:51,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 17:36:51,931 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_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 [2022-10-17 17:36:52,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:36:52,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:36:52,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:36:52,366 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:36:52,367 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:36:52,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/floats-cdfpl/square_4.i [2022-10-17 17:36:52,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/data/b87f1b6db/1e123f6daf6144fc8b5c027a3c36d0d5/FLAG2186039e3 [2022-10-17 17:36:52,937 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:36:52,938 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/sv-benchmarks/c/floats-cdfpl/square_4.i [2022-10-17 17:36:52,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/data/b87f1b6db/1e123f6daf6144fc8b5c027a3c36d0d5/FLAG2186039e3 [2022-10-17 17:36:53,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/data/b87f1b6db/1e123f6daf6144fc8b5c027a3c36d0d5 [2022-10-17 17:36:53,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:36:53,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:36:53,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:53,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:36:53,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:36:53,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ac607d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53, skipping insertion in model container [2022-10-17 17:36:53,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:36:53,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:36:53,621 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_82780cfc-1991-45fa-98a5-d2dc6457ce3b/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2022-10-17 17:36:53,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:53,638 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:36:53,655 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_82780cfc-1991-45fa-98a5-d2dc6457ce3b/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2022-10-17 17:36:53,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:53,675 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:36:53,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53 WrapperNode [2022-10-17 17:36:53,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:53,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:53,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:36:53,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:36:53,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,710 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2022-10-17 17:36:53,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:53,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:36:53,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:36:53,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:36:53,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,734 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:36:53,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:36:53,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:36:53,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:36:53,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (1/1) ... [2022-10-17 17:36:53,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:53,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:53,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:36:53,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:36:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:36:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-10-17 17:36:53,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:36:53,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:36:53,890 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:36:53,892 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:36:56,102 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:36:56,108 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:36:56,108 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:36:56,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:56 BoogieIcfgContainer [2022-10-17 17:36:56,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:36:56,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:36:56,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:36:56,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:36:56,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:36:53" (1/3) ... [2022-10-17 17:36:56,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb8cb96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:56, skipping insertion in model container [2022-10-17 17:36:56,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:53" (2/3) ... [2022-10-17 17:36:56,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb8cb96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:56, skipping insertion in model container [2022-10-17 17:36:56,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:56" (3/3) ... [2022-10-17 17:36:56,120 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4.i [2022-10-17 17:36:56,147 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:36:56,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:36:56,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:36:56,200 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@435197be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:36:56,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:36:56,205 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) [2022-10-17 17:36:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 17:36:56,212 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:56,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 17:36:56,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:56,219 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2022-10-17 17:36:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:36:56,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094228305] [2022-10-17 17:36:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:56,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:36:56,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:36:56,240 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:36:56,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 17:36:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:57,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 17:36:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:57,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:36:57,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:36:57,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094228305] [2022-10-17 17:36:57,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094228305] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:57,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:57,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:36:57,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596724363] [2022-10-17 17:36:57,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:57,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:36:57,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:36:57,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:36:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:36:57,090 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) [2022-10-17 17:36:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:57,105 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-10-17 17:36:57,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:36:57,107 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 [2022-10-17 17:36:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:57,115 INFO L225 Difference]: With dead ends: 19 [2022-10-17 17:36:57,116 INFO L226 Difference]: Without dead ends: 7 [2022-10-17 17:36:57,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:36:57,124 INFO L413 NwaCegarLoop]: 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 [2022-10-17 17:36:57,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:36:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-10-17 17:36:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-10-17 17:36:57,158 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) [2022-10-17 17:36:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-10-17 17:36:57,160 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2022-10-17 17:36:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:57,161 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-10-17 17:36:57,161 INFO L496 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) [2022-10-17 17:36:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-10-17 17:36:57,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 17:36:57,162 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:57,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 17:36:57,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:36:57,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:36:57,364 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2022-10-17 17:36:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:36:57,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589257859] [2022-10-17 17:36:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:57,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:36:57,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:36:57,378 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:36:57,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82780cfc-1991-45fa-98a5-d2dc6457ce3b/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process