./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH --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 f807884dfe796c964ede5317ceef5bdc8dc93cb7b5e0611cc0dc63f2d13b17a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:47:50,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:47:50,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:47:50,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:47:50,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:47:50,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:47:50,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:47:50,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:47:51,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:47:51,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:47:51,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:47:51,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:47:51,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:47:51,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:47:51,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:47:51,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:47:51,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:47:51,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:47:51,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:47:51,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:47:51,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:47:51,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:47:51,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:47:51,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:47:51,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:47:51,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:47:51,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:47:51,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:47:51,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:47:51,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:47:51,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:47:51,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:47:51,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:47:51,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:47:51,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:47:51,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:47:51,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:47:51,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:47:51,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:47:51,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:47:51,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:47:51,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:47:51,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:47:51,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:47:51,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:47:51,125 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:47:51,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:47:51,126 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:47:51,126 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:47:51,127 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:47:51,134 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:47:51,134 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:47:51,135 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:47:51,136 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:47:51,136 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:47:51,136 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:47:51,137 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:47:51,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:47:51,138 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:47:51,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:47:51,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:47:51,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:47:51,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:47:51,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:47:51,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:47:51,140 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:47:51,140 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:47:51,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:47:51,140 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:47:51,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:47:51,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:47:51,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:47:51,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:47:51,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:47:51,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:47:51,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:47:51,144 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:47:51,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:47:51,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:47:51,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:47:51,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:47:51,146 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_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f807884dfe796c964ede5317ceef5bdc8dc93cb7b5e0611cc0dc63f2d13b17a0 [2021-11-03 03:47:51,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:47:51,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:47:51,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:47:51,469 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:47:51,470 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:47:51,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c [2021-11-03 03:47:51,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/data/34118f99e/e457cd72d8ce4e5a9b5060c00ed13861/FLAG372e66e38 [2021-11-03 03:47:52,018 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:47:52,022 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c [2021-11-03 03:47:52,042 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/data/34118f99e/e457cd72d8ce4e5a9b5060c00ed13861/FLAG372e66e38 [2021-11-03 03:47:52,373 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/data/34118f99e/e457cd72d8ce4e5a9b5060c00ed13861 [2021-11-03 03:47:52,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:47:52,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:47:52,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:47:52,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:47:52,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:47:52,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e09898a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52, skipping insertion in model container [2021-11-03 03:47:52,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:47:52,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:47:52,640 WARN L228 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_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c[2006,2019] [2021-11-03 03:47:52,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:47:52,656 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:47:52,681 WARN L228 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_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c[2006,2019] [2021-11-03 03:47:52,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:47:52,698 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:47:52,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52 WrapperNode [2021-11-03 03:47:52,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:47:52,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:47:52,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:47:52,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:47:52,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:47:52,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:47:52,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:47:52,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:47:52,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:47:52,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:47:52,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:47:52,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:47:52,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (1/1) ... [2021-11-03 03:47:52,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:47:52,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:47:52,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:47:52,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:47:52,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:47:52,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:47:52,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-03 03:47:52,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 03:47:52,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-03 03:47:52,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:47:52,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:47:52,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 03:47:52,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:47:53,270 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:47:53,270 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 03:47:53,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:53 BoogieIcfgContainer [2021-11-03 03:47:53,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:47:53,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:47:53,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:47:53,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:47:53,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:52" (1/3) ... [2021-11-03 03:47:53,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb77589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:53, skipping insertion in model container [2021-11-03 03:47:53,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:52" (2/3) ... [2021-11-03 03:47:53,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb77589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:53, skipping insertion in model container [2021-11-03 03:47:53,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:53" (3/3) ... [2021-11-03 03:47:53,282 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_Newton.c.p+cfa-reducer.c [2021-11-03 03:47:53,288 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:47:53,289 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:47:53,342 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:47:53,350 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 [2021-11-03 03:47:53,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:47:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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) [2021-11-03 03:47:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 03:47:53,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:53,372 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:53,373 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:47:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:53,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1934553295, now seen corresponding path program 1 times [2021-11-03 03:47:53,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:47:53,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379840052] [2021-11-03 03:47:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:53,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:47:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:47:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:53,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:47:53,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379840052] [2021-11-03 03:47:53,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379840052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:47:53,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:47:53,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:47:53,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631879620] [2021-11-03 03:47:53,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:47:53,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:47:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:47:53,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:47:53,645 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-03 03:47:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:53,747 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2021-11-03 03:47:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:47:53,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-03 03:47:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:53,759 INFO L225 Difference]: With dead ends: 45 [2021-11-03 03:47:53,779 INFO L226 Difference]: Without dead ends: 32 [2021-11-03 03:47:53,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:47:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-03 03:47:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2021-11-03 03:47:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 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) [2021-11-03 03:47:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-03 03:47:53,832 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 10 [2021-11-03 03:47:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:53,833 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-03 03:47:53,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-03 03:47:53,834 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-03 03:47:53,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 03:47:53,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:53,835 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:53,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:47:53,836 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:47:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1483588724, now seen corresponding path program 1 times [2021-11-03 03:47:53,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:47:53,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838721223] [2021-11-03 03:47:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:53,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:47:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:47:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:53,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:47:53,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838721223] [2021-11-03 03:47:53,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838721223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:47:53,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:47:53,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 03:47:53,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676275501] [2021-11-03 03:47:53,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:47:53,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:47:53,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:47:53,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:47:53,980 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-03 03:47:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:54,072 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-11-03 03:47:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:47:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-03 03:47:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:54,074 INFO L225 Difference]: With dead ends: 43 [2021-11-03 03:47:54,074 INFO L226 Difference]: Without dead ends: 36 [2021-11-03 03:47:54,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:47:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-03 03:47:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 19. [2021-11-03 03:47:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2021-11-03 03:47:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-11-03 03:47:54,082 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 14 [2021-11-03 03:47:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:54,083 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-11-03 03:47:54,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-03 03:47:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-11-03 03:47:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 03:47:54,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:54,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:54,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 03:47:54,085 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:47:54,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2029187665, now seen corresponding path program 1 times [2021-11-03 03:47:54,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:47:54,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074030098] [2021-11-03 03:47:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:54,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:47:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:47:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 03:47:54,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:47:54,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074030098] [2021-11-03 03:47:54,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074030098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:47:54,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:47:54,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 03:47:54,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070287008] [2021-11-03 03:47:54,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:47:54,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:47:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:47:54,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:47:54,188 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-03 03:47:54,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:54,244 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-11-03 03:47:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:47:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-03 03:47:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:54,246 INFO L225 Difference]: With dead ends: 40 [2021-11-03 03:47:54,247 INFO L226 Difference]: Without dead ends: 34 [2021-11-03 03:47:54,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:47:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-03 03:47:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 19. [2021-11-03 03:47:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2021-11-03 03:47:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-03 03:47:54,254 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 14 [2021-11-03 03:47:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:54,255 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-03 03:47:54,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-03 03:47:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-03 03:47:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 03:47:54,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:54,256 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:54,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 03:47:54,257 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:47:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2046198326, now seen corresponding path program 1 times [2021-11-03 03:47:54,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:47:54,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113801109] [2021-11-03 03:47:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:54,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:47:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 03:47:54,285 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 03:47:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 03:47:54,350 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 03:47:54,351 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 03:47:54,352 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 03:47:54,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 03:47:54,358 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-03 03:47:54,361 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 03:47:54,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:47:54 BoogieIcfgContainer [2021-11-03 03:47:54,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 03:47:54,420 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 03:47:54,420 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 03:47:54,420 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 03:47:54,423 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:53" (3/4) ... [2021-11-03 03:47:54,427 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 03:47:54,427 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 03:47:54,436 INFO L168 Benchmark]: Toolchain (without parser) took 2051.21 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 49.0 MB in the beginning and 62.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2021-11-03 03:47:54,437 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory is still 65.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:47:54,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.43 ms. Allocated memory is still 90.2 MB. Free memory was 48.9 MB in the beginning and 64.4 MB in the end (delta: -15.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-03 03:47:54,440 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.81 ms. Allocated memory is still 90.2 MB. Free memory was 64.4 MB in the beginning and 62.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:47:54,441 INFO L168 Benchmark]: Boogie Preprocessor took 26.71 ms. Allocated memory is still 90.2 MB. Free memory was 62.7 MB in the beginning and 61.7 MB in the end (delta: 992.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:47:54,442 INFO L168 Benchmark]: RCFGBuilder took 503.63 ms. Allocated memory is still 90.2 MB. Free memory was 61.4 MB in the beginning and 49.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 03:47:54,445 INFO L168 Benchmark]: TraceAbstraction took 1144.69 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 48.8 MB in the beginning and 62.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-11-03 03:47:54,447 INFO L168 Benchmark]: Witness Printer took 6.96 ms. Allocated memory is still 109.1 MB. Free memory is still 62.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:47:54,452 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory is still 65.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 321.43 ms. Allocated memory is still 90.2 MB. Free memory was 48.9 MB in the beginning and 64.4 MB in the end (delta: -15.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.81 ms. Allocated memory is still 90.2 MB. Free memory was 64.4 MB in the beginning and 62.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.71 ms. Allocated memory is still 90.2 MB. Free memory was 62.7 MB in the beginning and 61.7 MB in the end (delta: 992.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 503.63 ms. Allocated memory is still 90.2 MB. Free memory was 61.4 MB in the beginning and 49.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1144.69 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 48.8 MB in the beginning and 62.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * Witness Printer took 6.96 ms. Allocated memory is still 109.1 MB. Free memory is still 62.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * 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: 96]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 45, overapproximation of someBinaryArithmeticDOUBLEoperation at line 53, overapproximation of someBinaryDOUBLEComparisonOperation at line 83, overapproximation of to_real at line 46. Possible FailurePath: [L1] int __return_main; [L17] double __return_104; [L20] double main__a; [L21] double main__r; [L22] main__a = __VERIFIER_nondet_double() [L23] int main____CPAchecker_TMP_0; VAL [__return_104=0, __return_main=0] [L24] COND TRUE main__a >= 20.0 VAL [__return_104=0, __return_main=0] [L26] COND TRUE main__a <= 30.0 [L28] main____CPAchecker_TMP_0 = 1 VAL [__return_104=0, __return_main=0] [L30] COND TRUE main____CPAchecker_TMP_0 != 0 [L33] double __tmp_1; [L34] __tmp_1 = main__a [L35] double inv__A; [L36] inv__A = __tmp_1 [L37] double inv__xi; [L38] double inv__xsi; [L39] double inv__temp; [L40] signed int inv__cond; [L41] signed int inv__exp; [L42] union double_int inv__A_u; [L43] union double_int inv__xi_u; [L44] inv__A_u.d = inv__A [L45] EXPR inv__A_u.i [L45] inv__exp = ((signed int)(((inv__A_u.i) & 2146435072) >> 20)) - 1023 [L46] inv__xi_u.d = 1 [L47] inv__xi_u.i = (1023 - inv__exp) << 20 [L48] EXPR inv__xi_u.d [L48] inv__xi = inv__xi_u.d [L49] inv__cond = 1 VAL [__return_104=0, __return_main=0] [L51] COND TRUE !(inv__cond == 0) [L53] inv__xsi = (2 * inv__xi) - ((inv__A * inv__xi) * inv__xi) [L54] inv__temp = inv__xsi - inv__xi [L55] int inv____CPAchecker_TMP_0; VAL [__return_104=0, __return_main=0] [L56] COND FALSE !(inv__temp > 1.0E-10) VAL [__return_104=0, __return_main=0] [L67] COND FALSE !(inv__temp < -1.0E-10) [L73] inv____CPAchecker_TMP_0 = 0 VAL [__return_104=0, __return_main=0] [L61] inv__cond = inv____CPAchecker_TMP_0 [L62] inv__xi = inv__xsi VAL [__return_104=0, __return_main=0] [L51] COND FALSE !(!(inv__cond == 0)) [L80] __return_104 = inv__xi [L81] main__r = __return_104 [L82] int main____CPAchecker_TMP_1; VAL [__return_104=2145386501, __return_main=0] [L83] COND FALSE !(main__r >= 0) VAL [__return_104=2145386501, __return_main=0] [L108] main____CPAchecker_TMP_1 = 0 VAL [__return_104=2145386501, __return_main=0] [L90] int __tmp_2; [L91] __tmp_2 = main____CPAchecker_TMP_1 [L92] int __VERIFIER_assert__cond; [L93] __VERIFIER_assert__cond = __tmp_2 VAL [__return_104=2145386501, __return_main=0] [L94] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_104=2145386501, __return_main=0] [L96] reach_error() VAL [__return_104=2145386501, __return_main=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 82 SDslu, 138 SDs, 0 SdLazy, 44 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 46 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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 [2021-11-03 03:47:54,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/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_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH --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 f807884dfe796c964ede5317ceef5bdc8dc93cb7b5e0611cc0dc63f2d13b17a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:47:57,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:47:57,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:47:57,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:47:57,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:47:57,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:47:57,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:47:57,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:47:57,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:47:57,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:47:57,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:47:57,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:47:57,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:47:57,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:47:57,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:47:57,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:47:57,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:47:57,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:47:57,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:47:57,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:47:57,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:47:57,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:47:57,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:47:57,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:47:57,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:47:57,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:47:57,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:47:57,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:47:57,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:47:57,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:47:57,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:47:57,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:47:57,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:47:57,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:47:57,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:47:57,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:47:57,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:47:57,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:47:57,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:47:57,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:47:57,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:47:57,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 03:47:57,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:47:57,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:47:57,381 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:47:57,381 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:47:57,382 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:47:57,382 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:47:57,382 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:47:57,383 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:47:57,383 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:47:57,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:47:57,384 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:47:57,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:47:57,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:47:57,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:47:57,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:47:57,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:47:57,386 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:47:57,386 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:47:57,386 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:47:57,386 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:47:57,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:47:57,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:47:57,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:47:57,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:47:57,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:47:57,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:47:57,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:47:57,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:47:57,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:47:57,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:47:57,389 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:47:57,390 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:47:57,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:47:57,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:47:57,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:47:57,391 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_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f807884dfe796c964ede5317ceef5bdc8dc93cb7b5e0611cc0dc63f2d13b17a0 [2021-11-03 03:47:57,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:47:57,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:47:57,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:47:57,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:47:57,885 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:47:57,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c [2021-11-03 03:47:57,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/data/c5ff04edf/d629b335eeeb4a46bcb5148d664da67b/FLAG489162253 [2021-11-03 03:47:58,515 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:47:58,516 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c [2021-11-03 03:47:58,524 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/data/c5ff04edf/d629b335eeeb4a46bcb5148d664da67b/FLAG489162253 [2021-11-03 03:47:58,873 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/data/c5ff04edf/d629b335eeeb4a46bcb5148d664da67b [2021-11-03 03:47:58,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:47:58,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:47:58,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:47:58,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:47:58,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:47:58,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:58" (1/1) ... [2021-11-03 03:47:58,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e446f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:58, skipping insertion in model container [2021-11-03 03:47:58,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:58" (1/1) ... [2021-11-03 03:47:58,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:47:58,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:47:59,174 WARN L228 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_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c[2006,2019] [2021-11-03 03:47:59,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:47:59,194 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:47:59,223 WARN L228 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_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c[2006,2019] [2021-11-03 03:47:59,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:47:59,269 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:47:59,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59 WrapperNode [2021-11-03 03:47:59,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:47:59,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:47:59,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:47:59,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:47:59,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:47:59,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:47:59,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:47:59,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:47:59,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:47:59,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:47:59,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:47:59,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:47:59,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (1/1) ... [2021-11-03 03:47:59,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:47:59,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:47:59,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:47:59,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:47:59,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-11-03 03:47:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-11-03 03:47:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:47:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:47:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 03:47:59,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:47:59,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:47:59,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:47:59,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 03:48:00,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:48:00,795 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 03:48:00,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:48:00 BoogieIcfgContainer [2021-11-03 03:48:00,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:48:00,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:48:00,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:48:00,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:48:00,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:58" (1/3) ... [2021-11-03 03:48:00,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b53d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:48:00, skipping insertion in model container [2021-11-03 03:48:00,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:59" (2/3) ... [2021-11-03 03:48:00,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b53d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:48:00, skipping insertion in model container [2021-11-03 03:48:00,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:48:00" (3/3) ... [2021-11-03 03:48:00,813 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_Newton.c.p+cfa-reducer.c [2021-11-03 03:48:00,820 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:48:00,820 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:48:00,892 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:48:00,906 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 [2021-11-03 03:48:00,906 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:48:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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) [2021-11-03 03:48:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 03:48:00,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:00,957 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:48:00,958 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:48:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:00,965 INFO L85 PathProgramCache]: Analyzing trace with hash -938930996, now seen corresponding path program 1 times [2021-11-03 03:48:00,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:48:00,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947302146] [2021-11-03 03:48:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:00,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:48:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:48:00,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:48:01,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:48:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:48:01,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:01,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:01,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:48:01,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947302146] [2021-11-03 03:48:01,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947302146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:48:01,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:48:01,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:48:01,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520215082] [2021-11-03 03:48:01,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:48:01,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:48:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:48:01,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:48:01,498 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-11-03 03:48:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:04,010 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-11-03 03:48:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:48:04,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 11 [2021-11-03 03:48:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:04,022 INFO L225 Difference]: With dead ends: 32 [2021-11-03 03:48:04,023 INFO L226 Difference]: Without dead ends: 19 [2021-11-03 03:48:04,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:48:04,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-03 03:48:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-03 03:48:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2021-11-03 03:48:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-11-03 03:48:04,064 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 11 [2021-11-03 03:48:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:04,064 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-11-03 03:48:04,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-11-03 03:48:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-11-03 03:48:04,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 03:48:04,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:04,066 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:48:04,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:04,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:48:04,277 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:48:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1250925041, now seen corresponding path program 1 times [2021-11-03 03:48:04,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:48:04,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877949009] [2021-11-03 03:48:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:04,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:48:04,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:48:04,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:48:04,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:48:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:05,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:48:05,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:05,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:05,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:48:05,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877949009] [2021-11-03 03:48:05,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877949009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:48:05,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:48:05,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:48:05,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291759306] [2021-11-03 03:48:05,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:48:05,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:48:05,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:48:05,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:48:05,521 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-11-03 03:48:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:08,047 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-11-03 03:48:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:48:08,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 15 [2021-11-03 03:48:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:08,049 INFO L225 Difference]: With dead ends: 28 [2021-11-03 03:48:08,050 INFO L226 Difference]: Without dead ends: 21 [2021-11-03 03:48:08,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:48:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-03 03:48:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-03 03:48:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2021-11-03 03:48:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-11-03 03:48:08,057 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 15 [2021-11-03 03:48:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:08,057 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-11-03 03:48:08,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-11-03 03:48:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2021-11-03 03:48:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 03:48:08,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:08,059 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:48:08,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:08,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:48:08,260 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:48:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1796523982, now seen corresponding path program 1 times [2021-11-03 03:48:08,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:48:08,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063623307] [2021-11-03 03:48:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:08,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:48:08,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:48:08,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:48:08,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:48:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:48:09,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 03:48:09,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 03:48:09,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:48:09,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063623307] [2021-11-03 03:48:09,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063623307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:48:09,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:48:09,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:48:09,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144541110] [2021-11-03 03:48:09,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:48:09,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:48:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:48:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:48:09,398 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-11-03 03:48:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:09,532 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-11-03 03:48:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:48:09,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 15 [2021-11-03 03:48:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:09,534 INFO L225 Difference]: With dead ends: 24 [2021-11-03 03:48:09,534 INFO L226 Difference]: Without dead ends: 20 [2021-11-03 03:48:09,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:48:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-03 03:48:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-03 03:48:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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) [2021-11-03 03:48:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-03 03:48:09,540 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2021-11-03 03:48:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:09,541 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-03 03:48:09,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-11-03 03:48:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-03 03:48:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 03:48:09,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:09,544 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:48:09,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:09,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:48:09,756 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:48:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1813534643, now seen corresponding path program 1 times [2021-11-03 03:48:09,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:48:09,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820670534] [2021-11-03 03:48:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:09,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:48:09,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:48:09,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:48:09,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:48:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:10,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 03:48:10,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:11,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 246 [2021-11-03 03:48:11,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:48:11,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 246 [2021-11-03 03:48:11,358 INFO L354 Elim1Store]: treesize reduction 20, result has 23.1 percent of original size [2021-11-03 03:48:11,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 333 [2021-11-03 03:48:11,515 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-03 03:48:11,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 333 [2021-11-03 03:49:05,134 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 64)) (v_skolemized_v_prenex_1_3 (_ BitVec 64))) (let ((.cse1 (fp ((_ extract 63 63) v_skolemized_v_prenex_1_3) ((_ extract 62 52) v_skolemized_v_prenex_1_3) ((_ extract 51 0) v_skolemized_v_prenex_1_3))) (.cse0 (let ((.cse2 (concat ((_ extract 63 32) |v_skolemized_q#valueAsBitvector_3|) (bvshl (bvadd (_ bv1023 32) (bvneg (bvadd (bvashr (bvand (_ bv2146435072 32) ((_ extract 31 0) v_skolemized_v_prenex_1_3)) (_ bv20 32)) (_ bv4294966273 32)))) (_ bv20 32))))) (fp ((_ extract 63 63) .cse2) ((_ extract 62 52) .cse2) ((_ extract 51 0) .cse2))))) (and (= (fp.sub c_currentRoundingMode c_ULTIMATE.start_main_~inv__xsi~0 .cse0) c_ULTIMATE.start_main_~inv__temp~0) (fp.leq .cse1 ((_ to_fp 11 53) c_currentRoundingMode 30.0)) (fp.geq .cse1 ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= (fp ((_ extract 63 63) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 62 52) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 51 0) |v_skolemized_q#valueAsBitvector_3|)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32))) (= c_ULTIMATE.start_main_~inv__xsi~0 (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) .cse0) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode .cse1 .cse0) .cse0)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-03 03:50:50,241 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 64)) (v_skolemized_v_prenex_1_3 (_ BitVec 64))) (let ((.cse1 (fp ((_ extract 63 63) v_skolemized_v_prenex_1_3) ((_ extract 62 52) v_skolemized_v_prenex_1_3) ((_ extract 51 0) v_skolemized_v_prenex_1_3))) (.cse0 (let ((.cse2 (concat ((_ extract 63 32) |v_skolemized_q#valueAsBitvector_3|) (bvshl (bvadd (_ bv1023 32) (bvneg (bvadd (bvashr (bvand (_ bv2146435072 32) ((_ extract 31 0) v_skolemized_v_prenex_1_3)) (_ bv20 32)) (_ bv4294966273 32)))) (_ bv20 32))))) (fp ((_ extract 63 63) .cse2) ((_ extract 62 52) .cse2) ((_ extract 51 0) .cse2))))) (and (not (fp.lt (fp.sub c_currentRoundingMode c_ULTIMATE.start_main_~inv__xsi~0 .cse0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10000000000.0))))) (fp.leq .cse1 ((_ to_fp 11 53) c_currentRoundingMode 30.0)) (fp.geq .cse1 ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= (fp ((_ extract 63 63) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 62 52) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 51 0) |v_skolemized_q#valueAsBitvector_3|)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32))) (= c_ULTIMATE.start_main_~inv__xsi~0 (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) .cse0) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode .cse1 .cse0) .cse0)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-03 03:51:43,990 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 64)) (v_skolemized_v_prenex_1_3 (_ BitVec 64))) (let ((.cse1 (let ((.cse2 (concat ((_ extract 63 32) |v_skolemized_q#valueAsBitvector_3|) (bvshl (bvadd (_ bv1023 32) (bvneg (bvadd (bvashr (bvand (_ bv2146435072 32) ((_ extract 31 0) v_skolemized_v_prenex_1_3)) (_ bv20 32)) (_ bv4294966273 32)))) (_ bv20 32))))) (fp ((_ extract 63 63) .cse2) ((_ extract 62 52) .cse2) ((_ extract 51 0) .cse2)))) (.cse0 (fp ((_ extract 63 63) v_skolemized_v_prenex_1_3) ((_ extract 62 52) v_skolemized_v_prenex_1_3) ((_ extract 51 0) v_skolemized_v_prenex_1_3)))) (and (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 30.0)) (= (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) .cse1) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 .cse1) .cse1)) c_ULTIMATE.start_main_~inv__xi~0) (not (fp.lt (fp.sub c_currentRoundingMode c_ULTIMATE.start_main_~inv__xi~0 .cse1) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10000000000.0))))) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= (fp ((_ extract 63 63) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 62 52) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 51 0) |v_skolemized_q#valueAsBitvector_3|)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-03 03:52:37,989 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 64)) (v_skolemized_v_prenex_1_3 (_ BitVec 64))) (let ((.cse0 (fp ((_ extract 63 63) v_skolemized_v_prenex_1_3) ((_ extract 62 52) v_skolemized_v_prenex_1_3) ((_ extract 51 0) v_skolemized_v_prenex_1_3))) (.cse2 (let ((.cse3 (concat ((_ extract 63 32) |v_skolemized_q#valueAsBitvector_3|) (bvshl (bvadd (_ bv1023 32) (bvneg (bvadd (bvashr (bvand (_ bv2146435072 32) ((_ extract 31 0) v_skolemized_v_prenex_1_3)) (_ bv20 32)) (_ bv4294966273 32)))) (_ bv20 32))))) (fp ((_ extract 63 63) .cse3) ((_ extract 62 52) .cse3) ((_ extract 51 0) .cse3))))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) .cse2) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 .cse2) .cse2)))) (and (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 30.0)) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 20.0)) (= .cse1 c_ULTIMATE.start_main_~main__r~0) (= (fp ((_ extract 63 63) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 62 52) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 51 0) |v_skolemized_q#valueAsBitvector_3|)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32))) (not (fp.lt (fp.sub c_currentRoundingMode .cse1 .cse2) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10000000000.0)))))))))) is different from false [2021-11-03 03:53:34,078 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 64)) (v_skolemized_v_prenex_1_3 (_ BitVec 64))) (let ((.cse2 (fp ((_ extract 63 63) v_skolemized_v_prenex_1_3) ((_ extract 62 52) v_skolemized_v_prenex_1_3) ((_ extract 51 0) v_skolemized_v_prenex_1_3))) (.cse1 (let ((.cse3 (concat ((_ extract 63 32) |v_skolemized_q#valueAsBitvector_3|) (bvshl (bvadd (_ bv1023 32) (bvneg (bvadd (bvashr (bvand (_ bv2146435072 32) ((_ extract 31 0) v_skolemized_v_prenex_1_3)) (_ bv20 32)) (_ bv4294966273 32)))) (_ bv20 32))))) (fp ((_ extract 63 63) .cse3) ((_ extract 62 52) .cse3) ((_ extract 51 0) .cse3))))) (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) .cse1) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 .cse1) .cse1)))) (and (not (fp.lt (fp.sub roundNearestTiesToEven .cse0 .cse1) (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10000000000.0))))) (fp.leq .cse2 ((_ to_fp 11 53) roundNearestTiesToEven 30.0)) (fp.geq .cse2 ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (= (fp ((_ extract 63 63) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 62 52) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 51 0) |v_skolemized_q#valueAsBitvector_3|)) ((_ to_fp 11 53) roundNearestTiesToEven (_ bv1 32))) (not (fp.geq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))))) is different from false [2021-11-03 03:53:36,155 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 64)) (v_skolemized_v_prenex_1_3 (_ BitVec 64))) (let ((.cse2 (fp ((_ extract 63 63) v_skolemized_v_prenex_1_3) ((_ extract 62 52) v_skolemized_v_prenex_1_3) ((_ extract 51 0) v_skolemized_v_prenex_1_3))) (.cse1 (let ((.cse3 (concat ((_ extract 63 32) |v_skolemized_q#valueAsBitvector_3|) (bvshl (bvadd (_ bv1023 32) (bvneg (bvadd (bvashr (bvand (_ bv2146435072 32) ((_ extract 31 0) v_skolemized_v_prenex_1_3)) (_ bv20 32)) (_ bv4294966273 32)))) (_ bv20 32))))) (fp ((_ extract 63 63) .cse3) ((_ extract 62 52) .cse3) ((_ extract 51 0) .cse3))))) (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) .cse1) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 .cse1) .cse1)))) (and (not (fp.lt (fp.sub roundNearestTiesToEven .cse0 .cse1) (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 10000000000.0))))) (fp.leq .cse2 ((_ to_fp 11 53) roundNearestTiesToEven 30.0)) (fp.geq .cse2 ((_ to_fp 11 53) roundNearestTiesToEven 20.0)) (= (fp ((_ extract 63 63) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 62 52) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 51 0) |v_skolemized_q#valueAsBitvector_3|)) ((_ to_fp 11 53) roundNearestTiesToEven (_ bv1 32))) (not (fp.geq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))))) is different from true [2021-11-03 03:56:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-03 03:56:19,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:56:30,633 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~inv__xi~0) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode c_ULTIMATE.start_main_~inv__A~0 c_ULTIMATE.start_main_~inv__xi~0) c_ULTIMATE.start_main_~inv__xi~0)))) (or (fp.lt (fp.sub c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~inv__xi~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10000000000.0)))) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))) is different from false [2021-11-03 03:56:32,787 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~inv__xi~0) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode c_ULTIMATE.start_main_~inv__A~0 c_ULTIMATE.start_main_~inv__xi~0) c_ULTIMATE.start_main_~inv__xi~0)))) (or (fp.lt (fp.sub c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~inv__xi~0) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10000000000.0)))) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))) is different from true [2021-11-03 03:56:37,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:37,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1913 treesize of output 1530 [2021-11-03 03:56:49,901 WARN L207 SmtUtils]: Spent 12.50 s on a formula simplification that was a NOOP. DAG size: 8 [2021-11-03 03:56:49,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:49,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1530 treesize of output 1494 [2021-11-03 03:57:24,466 WARN L207 SmtUtils]: Spent 34.53 s on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-11-03 03:57:24,467 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-11-03 03:57:24,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 2041 treesize of output 2047 [2021-11-03 03:58:08,489 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-03 03:58:08,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 11 [2021-11-03 03:59:11,053 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 64)) (v_skolemized_v_prenex_1_3 (_ BitVec 64))) (let ((.cse1 (let ((.cse2 (concat ((_ extract 63 32) |v_skolemized_q#valueAsBitvector_3|) (bvshl (bvadd (_ bv1023 32) (bvneg (bvadd (bvashr (bvand (_ bv2146435072 32) ((_ extract 31 0) v_skolemized_v_prenex_1_3)) (_ bv20 32)) (_ bv4294966273 32)))) (_ bv20 32))))) (fp ((_ extract 63 63) .cse2) ((_ extract 62 52) .cse2) ((_ extract 51 0) .cse2))))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) .cse1) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode c_ULTIMATE.start_main_~main__a~0 .cse1) .cse1)))) (or (fp.lt (fp.sub c_currentRoundingMode .cse0 .cse1) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10000000000.0)))) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (= (fp ((_ extract 63 63) v_skolemized_v_prenex_1_3) ((_ extract 62 52) v_skolemized_v_prenex_1_3) ((_ extract 51 0) v_skolemized_v_prenex_1_3)) c_ULTIMATE.start_main_~main__a~0)) (not (= (fp ((_ extract 63 63) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 62 52) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 51 0) |v_skolemized_q#valueAsBitvector_3|)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32)))))))) is different from true [2021-11-03 03:59:57,696 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 64)) (v_skolemized_v_prenex_1_3 (_ BitVec 64))) (let ((.cse1 (let ((.cse2 (concat ((_ extract 63 32) |v_skolemized_q#valueAsBitvector_3|) (bvshl (bvadd (_ bv1023 32) (bvneg (bvadd (bvashr (bvand (_ bv2146435072 32) ((_ extract 31 0) v_skolemized_v_prenex_1_3)) (_ bv20 32)) (_ bv4294966273 32)))) (_ bv20 32))))) (fp ((_ extract 63 63) .cse2) ((_ extract 62 52) .cse2) ((_ extract 51 0) .cse2))))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) .cse1) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode c_ULTIMATE.start_main_~main__a~0 .cse1) .cse1)))) (or (fp.lt (fp.sub c_currentRoundingMode .cse0 .cse1) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10000000000.0)))) (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (= (fp ((_ extract 63 63) v_skolemized_v_prenex_1_3) ((_ extract 62 52) v_skolemized_v_prenex_1_3) ((_ extract 51 0) v_skolemized_v_prenex_1_3)) c_ULTIMATE.start_main_~main__a~0)) (not (= (fp ((_ extract 63 63) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 62 52) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 51 0) |v_skolemized_q#valueAsBitvector_3|)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32)))))))) (not (fp.leq c_ULTIMATE.start_main_~main__a~0 ((_ to_fp 11 53) c_currentRoundingMode 30.0)))) is different from true [2021-11-03 04:00:53,159 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 64)) (v_skolemized_v_prenex_1_3 (_ BitVec 64))) (let ((.cse0 (fp ((_ extract 63 63) v_skolemized_v_prenex_1_3) ((_ extract 62 52) v_skolemized_v_prenex_1_3) ((_ extract 51 0) v_skolemized_v_prenex_1_3))) (.cse2 (let ((.cse3 (concat ((_ extract 63 32) |v_skolemized_q#valueAsBitvector_3|) (bvshl (bvadd (_ bv1023 32) (bvneg (bvadd (bvashr (bvand (_ bv2146435072 32) ((_ extract 31 0) v_skolemized_v_prenex_1_3)) (_ bv20 32)) (_ bv4294966273 32)))) (_ bv20 32))))) (fp ((_ extract 63 63) .cse3) ((_ extract 62 52) .cse3) ((_ extract 51 0) .cse3))))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) .cse2) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 .cse2) .cse2)))) (or (not (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 20.0))) (fp.lt (fp.sub c_currentRoundingMode .cse1 .cse2) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10000000000.0)))) (not (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 30.0))) (not (= (fp ((_ extract 63 63) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 62 52) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 51 0) |v_skolemized_q#valueAsBitvector_3|)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32)))) (fp.geq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from false [2021-11-03 04:00:55,298 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_skolemized_q#valueAsBitvector_3| (_ BitVec 64)) (v_skolemized_v_prenex_1_3 (_ BitVec 64))) (let ((.cse0 (fp ((_ extract 63 63) v_skolemized_v_prenex_1_3) ((_ extract 62 52) v_skolemized_v_prenex_1_3) ((_ extract 51 0) v_skolemized_v_prenex_1_3))) (.cse2 (let ((.cse3 (concat ((_ extract 63 32) |v_skolemized_q#valueAsBitvector_3|) (bvshl (bvadd (_ bv1023 32) (bvneg (bvadd (bvashr (bvand (_ bv2146435072 32) ((_ extract 31 0) v_skolemized_v_prenex_1_3)) (_ bv20 32)) (_ bv4294966273 32)))) (_ bv20 32))))) (fp ((_ extract 63 63) .cse3) ((_ extract 62 52) .cse3) ((_ extract 51 0) .cse3))))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) .cse2) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 .cse2) .cse2)))) (or (not (fp.geq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 20.0))) (fp.lt (fp.sub c_currentRoundingMode .cse1 .cse2) (fp.neg ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 10000000000.0)))) (not (fp.leq .cse0 ((_ to_fp 11 53) c_currentRoundingMode 30.0))) (not (= (fp ((_ extract 63 63) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 62 52) |v_skolemized_q#valueAsBitvector_3|) ((_ extract 51 0) |v_skolemized_q#valueAsBitvector_3|)) ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32)))) (fp.geq .cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))))) is different from true [2021-11-03 04:01:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-03 04:01:48,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:01:48,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820670534] [2021-11-03 04:01:48,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820670534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:01:48,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [654657372] [2021-11-03 04:01:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:01:48,792 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:01:48,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:01:48,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:01:48,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c836769a-7ecb-432d-9fbe-3d0ef4ab5dac/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-03 04:01:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:01:51,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-03 04:01:51,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:01:52,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 96