./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF --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 5c4c867e245be659b2db84171c62e45b03155ac4269b1a7d8c363c8f991a60db --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:22:39,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:22:39,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:22:39,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:22:39,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:22:39,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:22:39,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:22:39,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:22:39,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:22:39,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:22:39,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:22:39,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:22:39,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:22:39,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:22:39,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:22:39,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:22:39,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:22:39,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:22:39,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:22:39,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:22:39,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:22:39,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:22:39,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:22:39,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:22:39,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:22:39,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:22:39,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:22:39,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:22:39,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:22:39,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:22:39,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:22:39,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:22:39,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:22:39,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:22:39,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:22:39,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:22:39,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:22:39,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:22:39,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:22:39,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:22:39,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:22:39,088 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:22:39,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:22:39,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:22:39,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:22:39,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:22:39,117 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:22:39,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:22:39,117 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:22:39,118 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:22:39,118 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:22:39,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:22:39,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:22:39,118 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:22:39,118 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:22:39,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:22:39,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:22:39,119 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:22:39,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:22:39,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:22:39,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:22:39,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:22:39,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:22:39,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:22:39,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:22:39,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:22:39,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:22:39,121 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:22:39,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:22:39,122 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:22:39,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:22:39,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:22:39,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:22:39,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:39,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:22:39,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:22:39,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:22:39,123 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:22:39,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:22:39,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:22:39,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:22:39,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:22:39,124 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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c4c867e245be659b2db84171c62e45b03155ac4269b1a7d8c363c8f991a60db [2021-11-12 23:22:39,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:22:39,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:22:39,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:22:39,404 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:22:39,405 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:22:39,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c [2021-11-12 23:22:39,470 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/data/5b360394b/39aa9be4e73e44168bee117d07cdc2e6/FLAG578f82242 [2021-11-12 23:22:40,090 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:22:40,096 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c [2021-11-12 23:22:40,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/data/5b360394b/39aa9be4e73e44168bee117d07cdc2e6/FLAG578f82242 [2021-11-12 23:22:40,406 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/data/5b360394b/39aa9be4e73e44168bee117d07cdc2e6 [2021-11-12 23:22:40,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:22:40,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:22:40,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:40,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:22:40,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:22:40,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6acd6386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40, skipping insertion in model container [2021-11-12 23:22:40,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:22:40,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:22:40,665 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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c[1997,2010] [2021-11-12 23:22:40,670 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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c[2366,2379] [2021-11-12 23:22:40,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:40,715 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:22:40,730 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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c[1997,2010] [2021-11-12 23:22:40,731 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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c[2366,2379] [2021-11-12 23:22:40,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:40,781 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:22:40,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40 WrapperNode [2021-11-12 23:22:40,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:40,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:22:40,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:22:40,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:22:40,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:22:40,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:22:40,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:22:40,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:22:40,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:22:40,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:22:40,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:22:40,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:22:40,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (1/1) ... [2021-11-12 23:22:40,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:40,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:40,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:22:40,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:22:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:22:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-12 23:22:40,961 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-12 23:22:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:22:40,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:22:40,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:22:40,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:22:40,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:22:41,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:22:41,454 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:22:41,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:41 BoogieIcfgContainer [2021-11-12 23:22:41,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:22:41,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:22:41,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:22:41,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:22:41,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:22:40" (1/3) ... [2021-11-12 23:22:41,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c86a6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:22:41, skipping insertion in model container [2021-11-12 23:22:41,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:40" (2/3) ... [2021-11-12 23:22:41,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c86a6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:22:41, skipping insertion in model container [2021-11-12 23:22:41,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:41" (3/3) ... [2021-11-12 23:22:41,476 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_5a.c.cil.c [2021-11-12 23:22:41,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:22:41,483 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:22:41,524 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:22:41,531 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 [2021-11-12 23:22:41,531 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:22:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 38 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:22:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:22:41,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:41,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:22:41,554 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:41,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:41,560 INFO L85 PathProgramCache]: Analyzing trace with hash 7146571, now seen corresponding path program 1 times [2021-11-12 23:22:41,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:22:41,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306626768] [2021-11-12 23:22:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:41,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:22:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:22:41,684 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:22:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:22:41,758 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:22:41,761 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:22:41,763 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-12 23:22:41,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-12 23:22:41,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:22:41,770 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-12 23:22:41,773 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:22:41,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:22:41 BoogieIcfgContainer [2021-11-12 23:22:41,801 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:22:41,805 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:22:41,805 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:22:41,805 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:22:41,806 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:41" (3/4) ... [2021-11-12 23:22:41,809 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:22:41,809 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:22:41,811 INFO L158 Benchmark]: Toolchain (without parser) took 1400.54ms. Allocated memory is still 132.1MB. Free memory was 101.0MB in the beginning and 68.5MB in the end (delta: 32.5MB). Peak memory consumption was 30.8MB. Max. memory is 16.1GB. [2021-11-12 23:22:41,812 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory was 51.0MB in the beginning and 51.0MB in the end (delta: 47.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:22:41,814 INFO L158 Benchmark]: CACSL2BoogieTranslator took 366.52ms. Allocated memory is still 132.1MB. Free memory was 100.6MB in the beginning and 103.7MB in the end (delta: -3.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:22:41,815 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.77ms. Allocated memory is still 132.1MB. Free memory was 103.7MB in the beginning and 101.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:22:41,820 INFO L158 Benchmark]: Boogie Preprocessor took 44.49ms. Allocated memory is still 132.1MB. Free memory was 101.6MB in the beginning and 100.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:22:41,821 INFO L158 Benchmark]: RCFGBuilder took 572.47ms. Allocated memory is still 132.1MB. Free memory was 100.4MB in the beginning and 83.2MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:22:41,822 INFO L158 Benchmark]: TraceAbstraction took 334.67ms. Allocated memory is still 132.1MB. Free memory was 82.6MB in the beginning and 68.9MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:22:41,823 INFO L158 Benchmark]: Witness Printer took 5.09ms. Allocated memory is still 132.1MB. Free memory was 68.9MB in the beginning and 68.5MB in the end (delta: 429.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:22:41,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory was 51.0MB in the beginning and 51.0MB in the end (delta: 47.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 366.52ms. Allocated memory is still 132.1MB. Free memory was 100.6MB in the beginning and 103.7MB in the end (delta: -3.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.77ms. Allocated memory is still 132.1MB. Free memory was 103.7MB in the beginning and 101.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.49ms. Allocated memory is still 132.1MB. Free memory was 101.6MB in the beginning and 100.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 572.47ms. Allocated memory is still 132.1MB. Free memory was 100.4MB in the beginning and 83.2MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 334.67ms. Allocated memory is still 132.1MB. Free memory was 82.6MB in the beginning and 68.9MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 5.09ms. Allocated memory is still 132.1MB. Free memory was 68.9MB in the beginning and 68.5MB in the end (delta: 429.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L322] COND TRUE __VERIFIER_nondet_int() [L323] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.399f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 23:22:41,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF --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 5c4c867e245be659b2db84171c62e45b03155ac4269b1a7d8c363c8f991a60db --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:22:44,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:22:44,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:22:44,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:22:44,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:22:44,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:22:44,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:22:44,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:22:44,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:22:44,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:22:44,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:22:44,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:22:44,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:22:44,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:22:44,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:22:44,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:22:44,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:22:44,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:22:44,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:22:44,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:22:44,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:22:44,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:22:44,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:22:44,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:22:44,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:22:44,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:22:44,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:22:44,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:22:44,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:22:44,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:22:44,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:22:44,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:22:44,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:22:44,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:22:44,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:22:44,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:22:44,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:22:44,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:22:44,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:22:44,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:22:44,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:22:44,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:22:44,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:22:44,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:22:44,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:22:44,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:22:44,472 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:22:44,472 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:22:44,472 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:22:44,472 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:22:44,473 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:22:44,473 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:22:44,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:22:44,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:22:44,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:22:44,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:22:44,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:22:44,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:22:44,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:22:44,477 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:22:44,477 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:22:44,477 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:22:44,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:22:44,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:22:44,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:22:44,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:22:44,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:22:44,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:22:44,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:22:44,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:44,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:22:44,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:22:44,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:22:44,480 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:22:44,480 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:22:44,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:22:44,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:22:44,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:22:44,482 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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c4c867e245be659b2db84171c62e45b03155ac4269b1a7d8c363c8f991a60db [2021-11-12 23:22:44,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:22:44,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:22:44,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:22:44,887 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:22:44,889 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:22:44,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c [2021-11-12 23:22:44,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/data/de81eef30/2a68cc676ac24b5ab5a3d3f774e01023/FLAG5863964c6 [2021-11-12 23:22:45,510 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:22:45,511 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c [2021-11-12 23:22:45,519 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/data/de81eef30/2a68cc676ac24b5ab5a3d3f774e01023/FLAG5863964c6 [2021-11-12 23:22:45,852 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/data/de81eef30/2a68cc676ac24b5ab5a3d3f774e01023 [2021-11-12 23:22:45,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:22:45,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:22:45,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:45,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:22:45,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:22:45,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:45" (1/1) ... [2021-11-12 23:22:45,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e62808a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:45, skipping insertion in model container [2021-11-12 23:22:45,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:22:45" (1/1) ... [2021-11-12 23:22:45,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:22:45,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:22:46,067 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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c[1997,2010] [2021-11-12 23:22:46,072 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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c[2366,2379] [2021-11-12 23:22:46,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:46,213 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:22:46,243 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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c[1997,2010] [2021-11-12 23:22:46,244 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_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/sv-benchmarks/c/combinations/square_6+soft_float_5a.c.cil.c[2366,2379] [2021-11-12 23:22:46,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:22:46,319 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:22:46,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46 WrapperNode [2021-11-12 23:22:46,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:22:46,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:22:46,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:22:46,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:22:46,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (1/1) ... [2021-11-12 23:22:46,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (1/1) ... [2021-11-12 23:22:46,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:22:46,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:22:46,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:22:46,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:22:46,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (1/1) ... [2021-11-12 23:22:46,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (1/1) ... [2021-11-12 23:22:46,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (1/1) ... [2021-11-12 23:22:46,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (1/1) ... [2021-11-12 23:22:46,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (1/1) ... [2021-11-12 23:22:46,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (1/1) ... [2021-11-12 23:22:46,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (1/1) ... [2021-11-12 23:22:46,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:22:46,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:22:46,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:22:46,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:22:46,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (1/1) ... [2021-11-12 23:22:46,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:22:46,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:46,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:22:46,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:22:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:22:46,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:22:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-12 23:22:46,578 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-12 23:22:46,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:22:46,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:22:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:22:46,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:22:49,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:22:49,224 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:22:49,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:49 BoogieIcfgContainer [2021-11-12 23:22:49,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:22:49,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:22:49,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:22:49,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:22:49,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:22:45" (1/3) ... [2021-11-12 23:22:49,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3bce27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:22:49, skipping insertion in model container [2021-11-12 23:22:49,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:22:46" (2/3) ... [2021-11-12 23:22:49,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3bce27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:22:49, skipping insertion in model container [2021-11-12 23:22:49,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:49" (3/3) ... [2021-11-12 23:22:49,249 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_5a.c.cil.c [2021-11-12 23:22:49,254 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:22:49,254 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:22:49,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:22:49,313 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 [2021-11-12 23:22:49,314 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:22:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:22:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:22:49,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:49,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:49,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:49,344 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-12 23:22:49,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:49,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149012013] [2021-11-12 23:22:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:49,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:49,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:49,360 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:49,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:22:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:22:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:49,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:22:49,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:49,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149012013] [2021-11-12 23:22:49,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149012013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:49,966 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:49,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:22:49,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307352573] [2021-11-12 23:22:49,969 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:49,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:22:49,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:50,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:22:50,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:22:50,003 INFO L87 Difference]: Start difference. First operand has 61 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 54 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:50,034 INFO L93 Difference]: Finished difference Result 117 states and 175 transitions. [2021-11-12 23:22:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:22:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:22:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:50,045 INFO L225 Difference]: With dead ends: 117 [2021-11-12 23:22:50,046 INFO L226 Difference]: Without dead ends: 52 [2021-11-12 23:22:50,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:22:50,053 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.66ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:50,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 1.66ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:22:50,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-12 23:22:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-12 23:22:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 45 states have internal predecessors, (62), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 23:22:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2021-11-12 23:22:50,118 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 7 [2021-11-12 23:22:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:50,118 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2021-11-12 23:22:50,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2021-11-12 23:22:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:22:50,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:50,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:50,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:50,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:50,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-12 23:22:50,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:50,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9393] [2021-11-12 23:22:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:50,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:50,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:50,338 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:50,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:29:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:51,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:29:51,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:06,219 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-12 23:30:56,348 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1399.0 1000.0)))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-11-12 23:30:58,398 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1399.0 1000.0)))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-11-12 23:30:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:58,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:09,120 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24)))) is different from false [2021-11-12 23:31:11,193 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24)))) is different from true [2021-11-12 23:31:26,046 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24))))) is different from false [2021-11-12 23:31:28,119 WARN L860 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24))))) is different from true [2021-11-12 23:32:12,568 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.geq .cse1 (_ +zero 8 24)) (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0)))))))) is different from false [2021-11-12 23:32:14,643 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.geq .cse1 (_ +zero 8 24)) (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0)))))))) is different from true [2021-11-12 23:32:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:32:56,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:56,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9393] [2021-11-12 23:32:56,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:56,996 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:56,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 10 [2021-11-12 23:32:56,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661090755] [2021-11-12 23:32:56,997 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:56,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:32:56,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:32:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=20, Unknown=9, NotChecked=60, Total=110 [2021-11-12 23:32:57,000 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2021-11-12 23:32:59,083 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.geq .cse1 (_ +zero 8 24)) (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-12 23:33:01,162 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.geq .cse1 (_ +zero 8 24)) (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-12 23:33:03,231 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (.cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (or .cse0 (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse1 (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse3 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))) (.cse4 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse2))) (or (and .cse3 .cse4 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse0 (or (not .cse3) (not .cse4))))))) is different from false [2021-11-12 23:33:05,313 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (.cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (or .cse0 (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse1 (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse3 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))) (.cse4 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse2))) (or (and .cse3 .cse4 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse0 (or (not .cse3) (not .cse4))))))) is different from true [2021-11-12 23:33:07,382 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24)) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from false [2021-11-12 23:33:09,459 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24)) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-12 23:33:11,534 WARN L838 $PredicateComparison]: unable to prove that (and (fp.geq |c_ULTIMATE.start_main1_~result~0#1| (_ +zero 8 24)) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (fp.lt |c_ULTIMATE.start_main1_~result~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-12 23:33:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:11,567 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-11-12 23:33:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:33:11,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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 7 [2021-11-12 23:33:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:11,569 INFO L225 Difference]: With dead ends: 52 [2021-11-12 23:33:11,569 INFO L226 Difference]: Without dead ends: 47 [2021-11-12 23:33:11,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=29, Invalid=21, Unknown=16, NotChecked=144, Total=210 [2021-11-12 23:33:11,571 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 27.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:11,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 316 Invalid, 264 Unknown, 0 Unchecked, 5.65ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 261 Unchecked, 27.52ms Time] [2021-11-12 23:33:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-12 23:33:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-12 23:33:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 23:33:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2021-11-12 23:33:11,581 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 7 [2021-11-12 23:33:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:11,582 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2021-11-12 23:33:11,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2021-11-12 23:33:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2021-11-12 23:33:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-12 23:33:11,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:11,585 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:11,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:11,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:11,794 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:11,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:11,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1370969986, now seen corresponding path program 1 times [2021-11-12 23:33:11,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:11,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297688563] [2021-11-12 23:33:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:11,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:11,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:11,802 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:11,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:33:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:11,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:33:11,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:12,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:12,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:12,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297688563] [2021-11-12 23:33:12,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297688563] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:33:12,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:33:12,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:33:12,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169584572] [2021-11-12 23:33:12,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:12,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:33:12,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:33:12,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:33:12,605 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:33:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:12,911 INFO L93 Difference]: Finished difference Result 104 states and 150 transitions. [2021-11-12 23:33:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:33:12,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2021-11-12 23:33:12,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:12,915 INFO L225 Difference]: With dead ends: 104 [2021-11-12 23:33:12,915 INFO L226 Difference]: Without dead ends: 61 [2021-11-12 23:33:12,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:33:12,918 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 16 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 236.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.79ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 251.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:12,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 146 Invalid, 47 Unknown, 0 Unchecked, 2.79ms Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 251.16ms Time] [2021-11-12 23:33:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-12 23:33:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2021-11-12 23:33:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-12 23:33:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2021-11-12 23:33:12,932 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 43 [2021-11-12 23:33:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:12,933 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2021-11-12 23:33:12,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:33:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2021-11-12 23:33:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-12 23:33:12,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:12,937 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:12,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:13,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:13,139 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash -14997806, now seen corresponding path program 1 times [2021-11-12 23:33:13,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:13,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72382864] [2021-11-12 23:33:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:13,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:13,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:13,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:13,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:33:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:13,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:33:13,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:13,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:14,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:14,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72382864] [2021-11-12 23:33:14,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72382864] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:33:14,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:33:14,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:33:14,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354308319] [2021-11-12 23:33:14,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:14,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:33:14,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:33:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:33:14,026 INFO L87 Difference]: Start difference. First operand 52 states and 72 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:33:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:14,317 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2021-11-12 23:33:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:33:14,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-11-12 23:33:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:14,320 INFO L225 Difference]: With dead ends: 108 [2021-11-12 23:33:14,321 INFO L226 Difference]: Without dead ends: 64 [2021-11-12 23:33:14,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:33:14,323 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 219.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 240.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:14,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 240.83ms Time] [2021-11-12 23:33:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-12 23:33:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-11-12 23:33:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:33:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-11-12 23:33:14,336 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2021-11-12 23:33:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:14,337 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-11-12 23:33:14,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:33:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-11-12 23:33:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-12 23:33:14,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:14,341 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:14,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:14,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:14,561 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1638472845, now seen corresponding path program 1 times [2021-11-12 23:33:14,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:14,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264327742] [2021-11-12 23:33:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:14,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:14,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:14,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:14,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:33:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:14,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:33:14,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:14,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:15,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:15,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264327742] [2021-11-12 23:33:15,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264327742] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:33:15,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:33:15,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:33:15,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293351198] [2021-11-12 23:33:15,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:15,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:33:15,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:33:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:33:15,387 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:33:15,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:15,713 INFO L93 Difference]: Finished difference Result 117 states and 165 transitions. [2021-11-12 23:33:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:33:15,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-11-12 23:33:15,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:15,716 INFO L225 Difference]: With dead ends: 117 [2021-11-12 23:33:15,717 INFO L226 Difference]: Without dead ends: 68 [2021-11-12 23:33:15,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:33:15,719 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 259.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 273.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:15,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 153 Invalid, 51 Unknown, 0 Unchecked, 2.41ms Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 273.72ms Time] [2021-11-12 23:33:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-12 23:33:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-11-12 23:33:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:33:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2021-11-12 23:33:15,731 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 47 [2021-11-12 23:33:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:15,732 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2021-11-12 23:33:15,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:33:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2021-11-12 23:33:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 23:33:15,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:15,735 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:15,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:15,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:15,950 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:15,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash 388661875, now seen corresponding path program 1 times [2021-11-12 23:33:15,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:15,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146756834] [2021-11-12 23:33:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:15,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:15,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:15,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:33:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:16,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:16,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:16,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:16,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:16,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146756834] [2021-11-12 23:33:16,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146756834] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:33:16,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:33:16,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-12 23:33:16,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268582338] [2021-11-12 23:33:16,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:16,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:33:16,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:16,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:33:16,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:33:16,939 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:33:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:17,421 INFO L93 Difference]: Finished difference Result 125 states and 176 transitions. [2021-11-12 23:33:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:33:17,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-11-12 23:33:17,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:17,424 INFO L225 Difference]: With dead ends: 125 [2021-11-12 23:33:17,424 INFO L226 Difference]: Without dead ends: 75 [2021-11-12 23:33:17,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:33:17,429 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 351.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.48ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 392.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:17,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 202 Invalid, 83 Unknown, 0 Unchecked, 2.48ms Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 392.08ms Time] [2021-11-12 23:33:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-12 23:33:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-11-12 23:33:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.38) internal successors, (69), 51 states have internal predecessors, (69), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:33:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2021-11-12 23:33:17,456 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 48 [2021-11-12 23:33:17,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:17,456 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2021-11-12 23:33:17,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:33:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2021-11-12 23:33:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 23:33:17,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:17,459 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:17,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:17,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:17,660 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash 933318672, now seen corresponding path program 1 times [2021-11-12 23:33:17,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:17,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811934071] [2021-11-12 23:33:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:17,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:17,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:17,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:17,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:33:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:17,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:17,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:18,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:18,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:18,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811934071] [2021-11-12 23:33:18,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811934071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:18,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [151195476] [2021-11-12 23:33:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:18,743 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:18,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:18,750 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:18,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:33:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:18,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:33:18,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:33:19,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:33:19,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [151195476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:19,308 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:33:19,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-12 23:33:19,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819926975] [2021-11-12 23:33:19,309 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:19,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:33:19,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:33:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:33:19,310 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:33:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:19,330 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2021-11-12 23:33:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:33:19,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-11-12 23:33:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:19,332 INFO L225 Difference]: With dead ends: 79 [2021-11-12 23:33:19,333 INFO L226 Difference]: Without dead ends: 59 [2021-11-12 23:33:19,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:33:19,334 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 26 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:19,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 128 Invalid, 3 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 14.44ms Time] [2021-11-12 23:33:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-12 23:33:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-12 23:33:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.36) internal successors, (68), 51 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:33:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2021-11-12 23:33:19,343 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 49 [2021-11-12 23:33:19,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:19,344 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2021-11-12 23:33:19,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:33:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2021-11-12 23:33:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 23:33:19,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:19,346 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:19,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:19,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 23:33:19,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:19,749 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1543994934, now seen corresponding path program 1 times [2021-11-12 23:33:19,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:19,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907217418] [2021-11-12 23:33:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:19,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:19,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:19,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:19,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:33:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:19,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:20,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:20,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:20,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907217418] [2021-11-12 23:33:20,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907217418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:20,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [670191950] [2021-11-12 23:33:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:20,818 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:20,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:20,823 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:20,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:33:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:20,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:33:20,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:33:21,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:33:21,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [670191950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:21,521 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:33:21,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-12 23:33:21,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124937582] [2021-11-12 23:33:21,522 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:21,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:33:21,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:21,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:33:21,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:33:21,523 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:33:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:21,608 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2021-11-12 23:33:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:33:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-11-12 23:33:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:21,617 INFO L225 Difference]: With dead ends: 80 [2021-11-12 23:33:21,617 INFO L226 Difference]: Without dead ends: 59 [2021-11-12 23:33:21,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:33:21,619 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:21,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 187 Invalid, 7 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 26.21ms Time] [2021-11-12 23:33:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-12 23:33:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-12 23:33:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.34) internal successors, (67), 51 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:33:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2021-11-12 23:33:21,629 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 51 [2021-11-12 23:33:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:21,629 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2021-11-12 23:33:21,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:33:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2021-11-12 23:33:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 23:33:21,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:21,636 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:21,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:21,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:22,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:22,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2130800948, now seen corresponding path program 1 times [2021-11-12 23:33:22,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:22,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339115333] [2021-11-12 23:33:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:22,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:22,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:22,046 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:22,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:33:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:22,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:22,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:23,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:23,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339115333] [2021-11-12 23:33:23,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339115333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:23,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [722723735] [2021-11-12 23:33:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:23,109 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:23,115 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:23,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:33:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:23,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:33:23,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:33:23,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:33:24,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [722723735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:24,016 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:33:24,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-12 23:33:24,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912080860] [2021-11-12 23:33:24,017 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:24,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:33:24,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:33:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:33:24,018 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:33:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:24,421 INFO L93 Difference]: Finished difference Result 104 states and 141 transitions. [2021-11-12 23:33:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:33:24,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-11-12 23:33:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:24,424 INFO L225 Difference]: With dead ends: 104 [2021-11-12 23:33:24,424 INFO L226 Difference]: Without dead ends: 86 [2021-11-12 23:33:24,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:33:24,425 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 31 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 228.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 245.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:24,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 335 Invalid, 49 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 245.61ms Time] [2021-11-12 23:33:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-12 23:33:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2021-11-12 23:33:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.278688524590164) internal successors, (78), 63 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:33:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2021-11-12 23:33:24,436 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 51 [2021-11-12 23:33:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:24,437 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2021-11-12 23:33:24,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:33:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2021-11-12 23:33:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 23:33:24,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:24,439 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:24,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:24,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:24,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:24,841 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1771139338, now seen corresponding path program 1 times [2021-11-12 23:33:24,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:24,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264312723] [2021-11-12 23:33:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:24,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:24,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:24,843 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:24,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:33:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:24,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:24,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:25,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:25,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:25,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264312723] [2021-11-12 23:33:25,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264312723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:25,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1983478459] [2021-11-12 23:33:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:25,835 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:25,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:25,841 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:25,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:33:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:33:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:33:26,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:33:26,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1983478459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:26,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568559643] [2021-11-12 23:33:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:26,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:33:26,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:33:26,845 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:33:26,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 23:33:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:33:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:33:27,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:33:27,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568559643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:27,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:33:27,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 12 [2021-11-12 23:33:27,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222935324] [2021-11-12 23:33:27,524 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:33:27,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:33:27,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:33:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:33:27,526 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:33:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:29,240 INFO L93 Difference]: Finished difference Result 172 states and 235 transitions. [2021-11-12 23:33:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:33:29,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 51 [2021-11-12 23:33:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:29,243 INFO L225 Difference]: With dead ends: 172 [2021-11-12 23:33:29,243 INFO L226 Difference]: Without dead ends: 108 [2021-11-12 23:33:29,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:33:29,245 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 74 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 958.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1003.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:29,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 409 Invalid, 248 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [14 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 1003.69ms Time] [2021-11-12 23:33:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-12 23:33:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 80. [2021-11-12 23:33:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 71 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:33:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2021-11-12 23:33:29,271 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 51 [2021-11-12 23:33:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:29,272 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2021-11-12 23:33:29,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:33:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2021-11-12 23:33:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 23:33:29,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:29,274 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:29,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:29,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:29,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:29,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:33:29,876 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash 482568913, now seen corresponding path program 1 times [2021-11-12 23:33:29,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:29,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014412184] [2021-11-12 23:33:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:29,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:29,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:29,878 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:29,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:33:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:33:29,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:30,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:31,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:31,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014412184] [2021-11-12 23:33:31,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014412184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:31,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1490864423] [2021-11-12 23:33:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:31,020 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:31,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:31,021 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:31,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:33:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:31,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:31,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:33:31,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:33:31,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1490864423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:31,549 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:33:31,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-12 23:33:31,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158116622] [2021-11-12 23:33:31,550 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:31,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:33:31,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:33:31,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:33:31,552 INFO L87 Difference]: Start difference. First operand 80 states and 108 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:33:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:31,776 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2021-11-12 23:33:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:33:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-12 23:33:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:31,778 INFO L225 Difference]: With dead ends: 93 [2021-11-12 23:33:31,779 INFO L226 Difference]: Without dead ends: 87 [2021-11-12 23:33:31,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:33:31,780 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 13 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:31,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 231 Invalid, 20 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 80.83ms Time] [2021-11-12 23:33:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-12 23:33:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-11-12 23:33:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 76 states have internal predecessors, (95), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:33:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2021-11-12 23:33:31,791 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 55 [2021-11-12 23:33:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:31,792 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2021-11-12 23:33:31,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:33:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2021-11-12 23:33:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 23:33:31,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:31,794 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:31,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:32,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:32,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:32,203 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:32,203 INFO L85 PathProgramCache]: Analyzing trace with hash 539827215, now seen corresponding path program 1 times [2021-11-12 23:33:32,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:32,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412797344] [2021-11-12 23:33:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:32,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:32,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:32,205 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:32,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:33:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:32,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:33:32,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:32,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:33,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:33,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412797344] [2021-11-12 23:33:33,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412797344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:33,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1386004664] [2021-11-12 23:33:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:33,244 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:33,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:33,245 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:33,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 23:33:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:33:33,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:33,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:34,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1386004664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:34,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732662132] [2021-11-12 23:33:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:34,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:33:34,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:33:34,089 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:33:34,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 23:33:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:34,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:33:34,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:33:34,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:33:35,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732662132] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:33:35,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 23:33:35,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6, 6, 8] total 17 [2021-11-12 23:33:35,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209141560] [2021-11-12 23:33:35,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:35,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:33:35,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:33:35,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:33:35,100 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:33:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:35,317 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2021-11-12 23:33:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:33:35,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-12 23:33:35,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:35,319 INFO L225 Difference]: With dead ends: 91 [2021-11-12 23:33:35,319 INFO L226 Difference]: Without dead ends: 73 [2021-11-12 23:33:35,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:33:35,321 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:35,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 299 Invalid, 15 Unknown, 0 Unchecked, 1.17ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 62.26ms Time] [2021-11-12 23:33:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-12 23:33:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-12 23:33:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 65 states have internal predecessors, (80), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-12 23:33:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2021-11-12 23:33:35,331 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 55 [2021-11-12 23:33:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:35,331 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2021-11-12 23:33:35,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:33:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2021-11-12 23:33:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:33:35,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:35,333 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:35,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:35,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-12 23:33:35,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:35,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:33:35,943 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:35,943 INFO L85 PathProgramCache]: Analyzing trace with hash -979005146, now seen corresponding path program 1 times [2021-11-12 23:33:35,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:35,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628978209] [2021-11-12 23:33:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:35,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:35,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:35,945 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:35,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:33:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:35,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:33:35,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:33:36,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:33:37,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:37,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628978209] [2021-11-12 23:33:37,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628978209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:37,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [137567535] [2021-11-12 23:33:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:37,010 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:37,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:37,011 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:37,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 23:33:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:33:37,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:33:37,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:33:38,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [137567535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:38,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367299997] [2021-11-12 23:33:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:38,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:33:38,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:33:38,119 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:33:38,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 23:33:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:38,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:33:38,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:33:38,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:33:38,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367299997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:38,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:33:38,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 16 [2021-11-12 23:33:38,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032779824] [2021-11-12 23:33:38,696 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:33:38,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:33:38,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:38,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:33:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:33:38,698 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:33:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:42,424 INFO L93 Difference]: Finished difference Result 180 states and 238 transitions. [2021-11-12 23:33:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-12 23:33:42,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2021-11-12 23:33:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:42,426 INFO L225 Difference]: With dead ends: 180 [2021-11-12 23:33:42,426 INFO L226 Difference]: Without dead ends: 93 [2021-11-12 23:33:42,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 23:33:42,429 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 130 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1507.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.01ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1596.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:42,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 459 Invalid, 404 Unknown, 0 Unchecked, 7.01ms Time], IncrementalHoareTripleChecker [33 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 1596.18ms Time] [2021-11-12 23:33:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-12 23:33:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2021-11-12 23:33:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.265625) internal successors, (81), 66 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-12 23:33:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2021-11-12 23:33:42,439 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 60 [2021-11-12 23:33:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:42,440 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2021-11-12 23:33:42,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:33:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2021-11-12 23:33:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:33:42,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:42,442 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:42,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:42,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:42,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-12 23:33:43,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:43,058 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:43,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1446076250, now seen corresponding path program 1 times [2021-11-12 23:33:43,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:43,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341193560] [2021-11-12 23:33:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:43,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:43,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:43,060 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:43,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:33:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:33:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:33:43,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:33:44,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:44,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341193560] [2021-11-12 23:33:44,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341193560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:44,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [880763280] [2021-11-12 23:33:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:44,910 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:44,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:44,911 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:44,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:33:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:44,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:33:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:33:45,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:33:46,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [880763280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:46,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639915139] [2021-11-12 23:33:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:46,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:33:46,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:33:46,481 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:33:46,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 23:33:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:46,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:33:46,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:33:46,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:33:47,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639915139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:47,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:33:47,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-12 23:33:47,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585931126] [2021-11-12 23:33:47,388 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:33:47,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:33:47,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:47,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:33:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:33:47,390 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 19 states have internal predecessors, (95), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:33:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:51,173 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2021-11-12 23:33:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 23:33:51,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 19 states have internal predecessors, (95), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2021-11-12 23:33:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:51,175 INFO L225 Difference]: With dead ends: 185 [2021-11-12 23:33:51,175 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:33:51,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 403 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 23:33:51,177 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 172 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1881.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.93ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2004.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:51,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 534 Invalid, 508 Unknown, 0 Unchecked, 7.93ms Time], IncrementalHoareTripleChecker [38 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 2004.19ms Time] [2021-11-12 23:33:51,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:33:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:33:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-12 23:33:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:33:51,179 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2021-11-12 23:33:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:51,180 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:33:51,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 19 states have internal predecessors, (95), 3 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:33:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:33:51,180 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:33:51,183 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-12 23:33:51,184 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-12 23:33:51,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:51,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-12 23:33:51,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-12 23:33:51,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:33:51,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 23:33:53,094 INFO L854 garLoopResultBuilder]: At program point L122(lines 71 124) the Hoare annotation is: (or (and (= base2flt_~e |base2flt_#in~e|) (= base2flt_~__retres4~0 (_ bv0 32)) (= base2flt_~m (bvshl (bvshl |base2flt_#in~m| (_ bv1 32)) (_ bv1 32)))) (not (= |base2flt_#in~m| (_ bv0 32)))) [2021-11-12 23:33:53,094 INFO L858 garLoopResultBuilder]: For program point L81(lines 80 95) no Hoare annotation was computed. [2021-11-12 23:33:53,095 INFO L858 garLoopResultBuilder]: For program point L102(lines 100 115) no Hoare annotation was computed. [2021-11-12 23:33:53,095 INFO L858 garLoopResultBuilder]: For program point L90(lines 90 94) no Hoare annotation was computed. [2021-11-12 23:33:53,095 INFO L854 garLoopResultBuilder]: At program point L90-1(lines 80 95) the Hoare annotation is: (and (not (= |base2flt_#in~m| (_ bv0 32))) (or (bvult base2flt_~m (_ bv16777216 32)) (not (= |base2flt_#in~m| (_ bv1 32))))) [2021-11-12 23:33:53,095 INFO L858 garLoopResultBuilder]: For program point L78(lines 78 118) no Hoare annotation was computed. [2021-11-12 23:33:53,095 INFO L861 garLoopResultBuilder]: At program point base2fltENTRY(lines 67 125) the Hoare annotation is: true [2021-11-12 23:33:53,095 INFO L854 garLoopResultBuilder]: At program point L116(lines 78 118) the Hoare annotation is: (not (= |base2flt_#in~m| (_ bv0 32))) [2021-11-12 23:33:53,095 INFO L858 garLoopResultBuilder]: For program point base2fltFINAL(lines 67 125) no Hoare annotation was computed. [2021-11-12 23:33:53,095 INFO L854 garLoopResultBuilder]: At program point L100-2(lines 100 115) the Hoare annotation is: (let ((.cse0 (not (= |base2flt_#in~e| (_ bv0 32))))) (and (or (not (bvsle base2flt_~e (_ bv4294967168 32))) .cse0) (or (not (bvsle (bvadd (_ bv4294967292 32) base2flt_~e) (_ bv4294967168 32))) .cse0) (not (bvult |base2flt_#in~m| (_ bv16777216 32))))) [2021-11-12 23:33:53,095 INFO L858 garLoopResultBuilder]: For program point base2fltEXIT(lines 67 125) no Hoare annotation was computed. [2021-11-12 23:33:53,096 INFO L858 garLoopResultBuilder]: For program point L72(lines 72 77) no Hoare annotation was computed. [2021-11-12 23:33:53,096 INFO L858 garLoopResultBuilder]: For program point L101(lines 100 115) no Hoare annotation was computed. [2021-11-12 23:33:53,096 INFO L854 garLoopResultBuilder]: At program point L283(line 283) the Hoare annotation is: (= |ULTIMATE.start_main2_~zero~0#1| (_ bv0 32)) [2021-11-12 23:33:53,096 INFO L858 garLoopResultBuilder]: For program point L283-1(line 283) no Hoare annotation was computed. [2021-11-12 23:33:53,096 INFO L858 garLoopResultBuilder]: For program point L300(lines 300 309) no Hoare annotation was computed. [2021-11-12 23:33:53,096 INFO L854 garLoopResultBuilder]: At program point L300-2(lines 300 309) the Hoare annotation is: (and (= |ULTIMATE.start_main2_~tmp___0~0#1| (_ bv0 32)) (= |ULTIMATE.start_main2_~tmp___1~0#1| (_ bv0 32)) (= |ULTIMATE.start_main2_~zero~0#1| (_ bv0 32))) [2021-11-12 23:33:53,096 INFO L858 garLoopResultBuilder]: For program point L201(lines 201 207) no Hoare annotation was computed. [2021-11-12 23:33:53,096 INFO L858 garLoopResultBuilder]: For program point L201-2(lines 200 261) no Hoare annotation was computed. [2021-11-12 23:33:53,096 INFO L854 garLoopResultBuilder]: At program point L259(lines 200 261) the Hoare annotation is: (or (and (= |ULTIMATE.start_mulflt_~__retres10~1#1| (_ bv0 32)) (= |ULTIMATE.start_main2_~zero~0#1| (_ bv0 32))) (= (bvadd (_ bv1 32) |ULTIMATE.start_main2_~sb~0#1|) (_ bv0 32)) (and (= (_ bv1 32) |ULTIMATE.start_main2_~sb~0#1|) (= |ULTIMATE.start_main2_~tmp~2#1| (_ bv1 32)))) [2021-11-12 23:33:53,096 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-12 23:33:53,097 INFO L861 garLoopResultBuilder]: At program point L317(lines 263 319) the Hoare annotation is: true [2021-11-12 23:33:53,097 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-12 23:33:53,097 INFO L854 garLoopResultBuilder]: At program point L284(line 284) the Hoare annotation is: (= |ULTIMATE.start_main2_~zero~0#1| (_ bv0 32)) [2021-11-12 23:33:53,097 INFO L858 garLoopResultBuilder]: For program point L284-1(line 284) no Hoare annotation was computed. [2021-11-12 23:33:53,097 INFO L854 garLoopResultBuilder]: At program point L260(lines 190 262) the Hoare annotation is: (or (and (= (_ bv0 32) |ULTIMATE.start_mulflt_#res#1|) (= |ULTIMATE.start_mulflt_~__retres10~1#1| (_ bv0 32)) (= |ULTIMATE.start_main2_~zero~0#1| (_ bv0 32))) (= (bvadd (_ bv1 32) |ULTIMATE.start_main2_~sb~0#1|) (_ bv0 32)) (and (= (_ bv1 32) |ULTIMATE.start_main2_~sb~0#1|) (= |ULTIMATE.start_main2_~tmp~2#1| (_ bv1 32)))) [2021-11-12 23:33:53,098 INFO L858 garLoopResultBuilder]: For program point L228(lines 228 233) no Hoare annotation was computed. [2021-11-12 23:33:53,098 INFO L858 garLoopResultBuilder]: For program point L286(lines 286 295) no Hoare annotation was computed. [2021-11-12 23:33:53,098 INFO L858 garLoopResultBuilder]: For program point L286-2(lines 286 295) no Hoare annotation was computed. [2021-11-12 23:33:53,098 INFO L858 garLoopResultBuilder]: For program point L47(lines 47 48) no Hoare annotation was computed. [2021-11-12 23:33:53,098 INFO L858 garLoopResultBuilder]: For program point L303(lines 303 307) no Hoare annotation was computed. [2021-11-12 23:33:53,098 INFO L858 garLoopResultBuilder]: For program point L47-2(lines 47 48) no Hoare annotation was computed. [2021-11-12 23:33:53,099 INFO L858 garLoopResultBuilder]: For program point L237(lines 237 254) no Hoare annotation was computed. [2021-11-12 23:33:53,099 INFO L858 garLoopResultBuilder]: For program point L303-2(lines 303 307) no Hoare annotation was computed. [2021-11-12 23:33:53,099 INFO L858 garLoopResultBuilder]: For program point L237-2(lines 237 254) no Hoare annotation was computed. [2021-11-12 23:33:53,099 INFO L858 garLoopResultBuilder]: For program point L320(lines 320 326) no Hoare annotation was computed. [2021-11-12 23:33:53,099 INFO L858 garLoopResultBuilder]: For program point L246(lines 246 251) no Hoare annotation was computed. [2021-11-12 23:33:53,099 INFO L858 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2021-11-12 23:33:53,100 INFO L858 garLoopResultBuilder]: For program point L238(lines 238 243) no Hoare annotation was computed. [2021-11-12 23:33:53,100 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-12 23:33:53,100 INFO L858 garLoopResultBuilder]: For program point L222(lines 222 227) no Hoare annotation was computed. [2021-11-12 23:33:53,100 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2021-11-12 23:33:53,100 INFO L858 garLoopResultBuilder]: For program point L322(lines 322 325) no Hoare annotation was computed. [2021-11-12 23:33:53,101 INFO L858 garLoopResultBuilder]: For program point L33(lines 33 35) no Hoare annotation was computed. [2021-11-12 23:33:53,101 INFO L858 garLoopResultBuilder]: For program point L289(lines 289 293) no Hoare annotation was computed. [2021-11-12 23:33:53,101 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-12 23:33:53,101 INFO L858 garLoopResultBuilder]: For program point L289-2(lines 289 293) no Hoare annotation was computed. [2021-11-12 23:33:53,101 INFO L861 garLoopResultBuilder]: At program point L281(line 281) the Hoare annotation is: true [2021-11-12 23:33:53,102 INFO L858 garLoopResultBuilder]: For program point L281-1(line 281) no Hoare annotation was computed. [2021-11-12 23:33:53,102 INFO L861 garLoopResultBuilder]: At program point L50(lines 37 51) the Hoare annotation is: true [2021-11-12 23:33:53,102 INFO L858 garLoopResultBuilder]: For program point L34(line 34) no Hoare annotation was computed. [2021-11-12 23:33:53,102 INFO L854 garLoopResultBuilder]: At program point L282(line 282) the Hoare annotation is: (= |ULTIMATE.start_main2_~zero~0#1| (_ bv0 32)) [2021-11-12 23:33:53,102 INFO L858 garLoopResultBuilder]: For program point L282-1(line 282) no Hoare annotation was computed. [2021-11-12 23:33:53,102 INFO L858 garLoopResultBuilder]: For program point L299(lines 299 315) no Hoare annotation was computed. [2021-11-12 23:33:53,103 INFO L858 garLoopResultBuilder]: For program point L299-1(lines 299 315) no Hoare annotation was computed. [2021-11-12 23:33:53,103 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 58 63) the Hoare annotation is: true [2021-11-12 23:33:53,103 INFO L858 garLoopResultBuilder]: For program point L60(line 60) no Hoare annotation was computed. [2021-11-12 23:33:53,103 INFO L858 garLoopResultBuilder]: For program point L59(lines 59 61) no Hoare annotation was computed. [2021-11-12 23:33:53,103 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 58 63) no Hoare annotation was computed. [2021-11-12 23:33:53,104 INFO L858 garLoopResultBuilder]: For program point L59-2(lines 58 63) no Hoare annotation was computed. [2021-11-12 23:33:53,104 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 60) no Hoare annotation was computed. [2021-11-12 23:33:53,108 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:33:53,110 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:33:53,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:33:53 BoogieIcfgContainer [2021-11-12 23:33:53,130 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:33:53,130 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:33:53,136 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:33:53,136 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:33:53,137 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:22:49" (3/4) ... [2021-11-12 23:33:53,139 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 23:33:53,146 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure base2flt [2021-11-12 23:33:53,146 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-12 23:33:53,157 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-11-12 23:33:53,157 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-12 23:33:53,158 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-12 23:33:53,158 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 23:33:53,187 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((e == \old(e) && __retres4 == 0bv32) && m == ~bvshl32(~bvshl32(\old(m), 1bv32), 1bv32)) || !(\old(m) == 0bv32) [2021-11-12 23:33:53,187 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: !(\old(m) == 0bv32) && (~bvult32(m, 16777216bv32) || !(\old(m) == 1bv32)) [2021-11-12 23:33:53,187 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((!~bvsle32(e, 4294967168bv32) || !(\old(e) == 0bv32)) && (!~bvsle32(~bvadd64(4294967292bv32, e), 4294967168bv32) || !(\old(e) == 0bv32))) && !~bvult32(\old(m), 16777216bv32) [2021-11-12 23:33:53,187 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: !(\old(m) == 0bv32) [2021-11-12 23:33:53,188 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((0bv32 == \result && __retres10 == 0bv32) && zero == 0bv32) || ~bvadd64(1bv32, sb) == 0bv32) || (1bv32 == sb && tmp == 1bv32) [2021-11-12 23:33:53,227 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 23:33:53,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:33:53,227 INFO L158 Benchmark]: Toolchain (without parser) took 667371.14ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 40.5MB in the beginning and 46.0MB in the end (delta: -5.5MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2021-11-12 23:33:53,228 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 42.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:33:53,229 INFO L158 Benchmark]: CACSL2BoogieTranslator took 462.28ms. Allocated memory is still 60.8MB. Free memory was 40.3MB in the beginning and 41.2MB in the end (delta: -939.5kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:33:53,229 INFO L158 Benchmark]: Boogie Procedure Inliner took 80.26ms. Allocated memory is still 60.8MB. Free memory was 41.0MB in the beginning and 39.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:33:53,230 INFO L158 Benchmark]: Boogie Preprocessor took 72.80ms. Allocated memory is still 60.8MB. Free memory was 39.3MB in the beginning and 37.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:33:53,230 INFO L158 Benchmark]: RCFGBuilder took 2750.79ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 37.4MB in the beginning and 59.1MB in the end (delta: -21.7MB). Peak memory consumption was 18.8MB. Max. memory is 16.1GB. [2021-11-12 23:33:53,231 INFO L158 Benchmark]: TraceAbstraction took 663901.68ms. Allocated memory is still 77.6MB. Free memory was 58.8MB in the beginning and 50.8MB in the end (delta: 7.9MB). Peak memory consumption was 37.9MB. Max. memory is 16.1GB. [2021-11-12 23:33:53,231 INFO L158 Benchmark]: Witness Printer took 96.49ms. Allocated memory is still 77.6MB. Free memory was 50.8MB in the beginning and 46.0MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-12 23:33:53,234 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 42.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 462.28ms. Allocated memory is still 60.8MB. Free memory was 40.3MB in the beginning and 41.2MB in the end (delta: -939.5kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 80.26ms. Allocated memory is still 60.8MB. Free memory was 41.0MB in the beginning and 39.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.80ms. Allocated memory is still 60.8MB. Free memory was 39.3MB in the beginning and 37.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2750.79ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 37.4MB in the beginning and 59.1MB in the end (delta: -21.7MB). Peak memory consumption was 18.8MB. Max. memory is 16.1GB. * TraceAbstraction took 663901.68ms. Allocated memory is still 77.6MB. Free memory was 58.8MB in the beginning and 50.8MB in the end (delta: 7.9MB). Peak memory consumption was 37.9MB. Max. memory is 16.1GB. * Witness Printer took 96.49ms. Allocated memory is still 77.6MB. Free memory was 50.8MB in the beginning and 46.0MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 60]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 663.8s, OverallIterations: 14, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 26.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 573 SdHoareTripleChecker+Valid, 6218.72ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 573 mSDsluCounter, 3641 SdHoareTripleChecker+Invalid, 5838.41ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 261 IncrementalHoareTripleChecker+Unchecked, 2821 mSDsCounter, 93 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1386 IncrementalHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 93 mSolverCounterUnsat, 820 mSDtfsCounter, 1386 mSolverCounterSat, 42.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2663 GetRequests, 2472 SyntacticMatches, 4 SemanticMatches, 187 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 45.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=11, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 105 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 137 PreInvPairs, 382 NumberOfFragments, 128 HoareAnnotationTreeSize, 137 FomulaSimplifications, 1719 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 900 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 421.5s SatisfiabilityAnalysisTime, 207.9s InterpolantComputationTime, 1321 NumberOfCodeBlocks, 1321 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 2590 ConstructedInterpolants, 4 QuantifiedInterpolants, 5334 SizeOfPredicates, 61 NumberOfNonLiveVariables, 2608 ConjunctsInSsa, 134 ConjunctsInUnsatCore, 52 InterpolantComputations, 17 PerfectInterpolantSequences, 1436/1728 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 200]: Loop Invariant Derived loop invariant: ((__retres10 == 0bv32 && zero == 0bv32) || ~bvadd64(1bv32, sb) == 0bv32) || (1bv32 == sb && tmp == 1bv32) - InvariantResult [Line: 263]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 78]: Loop Invariant Derived loop invariant: !(\old(m) == 0bv32) - InvariantResult [Line: 71]: Loop Invariant Derived loop invariant: ((e == \old(e) && __retres4 == 0bv32) && m == ~bvshl32(~bvshl32(\old(m), 1bv32), 1bv32)) || !(\old(m) == 0bv32) - InvariantResult [Line: 100]: Loop Invariant Derived loop invariant: ((!~bvsle32(e, 4294967168bv32) || !(\old(e) == 0bv32)) && (!~bvsle32(~bvadd64(4294967292bv32, e), 4294967168bv32) || !(\old(e) == 0bv32))) && !~bvult32(\old(m), 16777216bv32) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 80]: Loop Invariant Derived loop invariant: !(\old(m) == 0bv32) && (~bvult32(m, 16777216bv32) || !(\old(m) == 1bv32)) - InvariantResult [Line: 190]: Loop Invariant Derived loop invariant: (((0bv32 == \result && __retres10 == 0bv32) && zero == 0bv32) || ~bvadd64(1bv32, sb) == 0bv32) || (1bv32 == sb && tmp == 1bv32) RESULT: Ultimate proved your program to be correct! [2021-11-12 23:33:53,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8ee31c-b895-4a7f-aa9c-cc5e0e8af8f5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE