./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/interpolation.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/interpolation.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7 --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 30f6a485d859f7eee00a1696279d966456b3a38851c6233a0367f621da73d6bd --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:40:05,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:40:05,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:40:05,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:40:05,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:40:05,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:40:05,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:40:05,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:40:05,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:40:05,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:40:05,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:40:05,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:40:05,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:40:05,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:40:05,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:40:05,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:40:05,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:40:05,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:40:05,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:40:05,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:40:05,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:40:05,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:40:05,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:40:05,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:40:05,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:40:05,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:40:05,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:40:05,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:40:05,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:40:05,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:40:05,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:40:05,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:40:05,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:40:05,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:40:05,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:40:05,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:40:05,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:40:05,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:40:05,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:40:05,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:40:05,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:40:05,168 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:40:05,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:40:05,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:40:05,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:40:05,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:40:05,215 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:40:05,215 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:40:05,215 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:40:05,215 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:40:05,215 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:40:05,215 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:40:05,216 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:40:05,216 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:40:05,216 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:40:05,216 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:40:05,216 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:40:05,216 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:40:05,216 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:40:05,216 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:40:05,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:40:05,217 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:40:05,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:40:05,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:40:05,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:40:05,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:40:05,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:40:05,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:40:05,218 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:40:05,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:40:05,218 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:40:05,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:40:05,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:40:05,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:40:05,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:40:05,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:40:05,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:40:05,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:40:05,219 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:40:05,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:40:05,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:40:05,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:40:05,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:40:05,220 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_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30f6a485d859f7eee00a1696279d966456b3a38851c6233a0367f621da73d6bd [2021-11-25 18:40:05,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:40:05,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:40:05,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:40:05,572 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:40:05,573 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:40:05,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/interpolation.c [2021-11-25 18:40:05,661 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/data/796c89faa/0eb6cd52fbe0476cb8f5db58c4b7ffa0/FLAG737ae0757 [2021-11-25 18:40:06,160 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:40:06,161 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/sv-benchmarks/c/float-benchs/interpolation.c [2021-11-25 18:40:06,173 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/data/796c89faa/0eb6cd52fbe0476cb8f5db58c4b7ffa0/FLAG737ae0757 [2021-11-25 18:40:06,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/data/796c89faa/0eb6cd52fbe0476cb8f5db58c4b7ffa0 [2021-11-25 18:40:06,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:40:06,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:40:06,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:40:06,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:40:06,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:40:06,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d6a87e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06, skipping insertion in model container [2021-11-25 18:40:06,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:40:06,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:40:06,698 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/sv-benchmarks/c/float-benchs/interpolation.c[449,462] [2021-11-25 18:40:06,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:40:06,726 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:40:06,739 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/sv-benchmarks/c/float-benchs/interpolation.c[449,462] [2021-11-25 18:40:06,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:40:06,762 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:40:06,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06 WrapperNode [2021-11-25 18:40:06,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:40:06,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:40:06,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:40:06,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:40:06,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,797 INFO L137 Inliner]: procedures = 18, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2021-11-25 18:40:06,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:40:06,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:40:06,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:40:06,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:40:06,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:40:06,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:40:06,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:40:06,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:40:06,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (1/1) ... [2021-11-25 18:40:06,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:40:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:06,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:40:06,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:40:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:40:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:40:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:40:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-25 18:40:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:40:06,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:40:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-11-25 18:40:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:40:06,954 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:40:06,956 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:40:07,089 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:40:07,166 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:40:07,166 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:40:07,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:40:07 BoogieIcfgContainer [2021-11-25 18:40:07,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:40:07,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:40:07,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:40:07,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:40:07,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:40:06" (1/3) ... [2021-11-25 18:40:07,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248dd02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:40:07, skipping insertion in model container [2021-11-25 18:40:07,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:06" (2/3) ... [2021-11-25 18:40:07,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248dd02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:40:07, skipping insertion in model container [2021-11-25 18:40:07,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:40:07" (3/3) ... [2021-11-25 18:40:07,194 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c [2021-11-25 18:40:07,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:40:07,199 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:40:07,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:40:07,258 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 [2021-11-25 18:40:07,258 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:40:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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) [2021-11-25 18:40:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:40:07,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:07,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:40:07,278 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:07,284 INFO L85 PathProgramCache]: Analyzing trace with hash 85683978, now seen corresponding path program 1 times [2021-11-25 18:40:07,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:07,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146476865] [2021-11-25 18:40:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:07,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:07,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146476865] [2021-11-25 18:40:07,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146476865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:07,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:07,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:40:07,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478278296] [2021-11-25 18:40:07,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:07,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:40:07,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:07,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:40:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:07,545 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-25 18:40:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:07,583 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-11-25 18:40:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:40:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-25 18:40:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:07,590 INFO L225 Difference]: With dead ends: 23 [2021-11-25 18:40:07,591 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:40:07,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:07,596 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:07,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:40:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:40:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2021-11-25 18:40:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2021-11-25 18:40:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-25 18:40:07,624 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-25 18:40:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:07,624 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-25 18:40:07,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-25 18:40:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-25 18:40:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:40:07,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:07,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:40:07,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:40:07,626 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1666710841, now seen corresponding path program 1 times [2021-11-25 18:40:07,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:07,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517023993] [2021-11-25 18:40:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:07,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:40:07,658 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:40:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:40:07,697 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:40:07,697 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:40:07,699 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:40:07,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:40:07,705 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-25 18:40:07,708 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:40:07,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:40:07 BoogieIcfgContainer [2021-11-25 18:40:07,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:40:07,730 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:40:07,730 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:40:07,730 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:40:07,730 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:40:07" (3/4) ... [2021-11-25 18:40:07,733 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 18:40:07,733 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:40:07,733 INFO L158 Benchmark]: Toolchain (without parser) took 1225.72ms. Allocated memory is still 115.3MB. Free memory was 78.4MB in the beginning and 48.1MB in the end (delta: 30.3MB). Peak memory consumption was 26.3MB. Max. memory is 16.1GB. [2021-11-25 18:40:07,734 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 115.3MB. Free memory was 86.8MB in the beginning and 86.8MB in the end (delta: 26.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:40:07,734 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.87ms. Allocated memory is still 115.3MB. Free memory was 78.2MB in the beginning and 89.5MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:40:07,735 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.42ms. Allocated memory is still 115.3MB. Free memory was 89.0MB in the beginning and 87.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:40:07,735 INFO L158 Benchmark]: Boogie Preprocessor took 25.27ms. Allocated memory is still 115.3MB. Free memory was 87.4MB in the beginning and 86.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:40:07,736 INFO L158 Benchmark]: RCFGBuilder took 343.50ms. Allocated memory is still 115.3MB. Free memory was 86.4MB in the beginning and 74.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 18:40:07,737 INFO L158 Benchmark]: TraceAbstraction took 541.31ms. Allocated memory is still 115.3MB. Free memory was 73.7MB in the beginning and 48.6MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-25 18:40:07,737 INFO L158 Benchmark]: Witness Printer took 2.91ms. Allocated memory is still 115.3MB. Free memory was 48.6MB in the beginning and 48.1MB in the end (delta: 501.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:40:07,741 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 115.3MB. Free memory was 86.8MB in the beginning and 86.8MB in the end (delta: 26.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.87ms. Allocated memory is still 115.3MB. Free memory was 78.2MB in the beginning and 89.5MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.42ms. Allocated memory is still 115.3MB. Free memory was 89.0MB in the beginning and 87.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.27ms. Allocated memory is still 115.3MB. Free memory was 87.4MB in the beginning and 86.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 343.50ms. Allocated memory is still 115.3MB. Free memory was 86.4MB in the beginning and 74.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 541.31ms. Allocated memory is still 115.3MB. Free memory was 73.7MB in the beginning and 48.6MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 2.91ms. Allocated memory is still 115.3MB. Free memory was 48.6MB in the beginning and 48.1MB in the end (delta: 501.9kB). 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: 9]: 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 26, overapproximation of to_real at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 24. Possible FailurePath: [L13] int i; [L14] float z, t; [L15] float min[] = { 5, 10, 12, 30, 150 }; [L16] float max[] = { 10, 12, 30, 150, 300 }; [L18] t = __VERIFIER_nondet_float() [L19] EXPR min[0] [L19] EXPR t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L19] EXPR max[sizeof(max) / sizeof(max[0]) - 1] [L19] EXPR t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L19] CALL assume_abort_if_not(t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1]) [L7] COND FALSE !(!cond) [L19] RET assume_abort_if_not(t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1]) [L21] i = 0 VAL [i=0, max={5:0}, min={4:0}] [L21] COND TRUE i < sizeof(min) / sizeof(min[0]) [L22] EXPR max[i] VAL [i=0, max={5:0}, max[i]=49, min={4:0}] [L22] COND TRUE t <= max[i] [L24] EXPR min[i] [L24] EXPR max[i] [L24] EXPR min[i] [L24] z = (t - min[i]) / (max[i] - min[i]) [L26] CALL __VERIFIER_assert(z >= 0.f && z <= 1.f) [L9] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L9] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 5 mSDtfsCounter, 9 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2021-11-25 18:40:07,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/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_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/interpolation.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7 --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 30f6a485d859f7eee00a1696279d966456b3a38851c6233a0367f621da73d6bd --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:40:10,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:40:10,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:40:10,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:40:10,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:40:10,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:40:10,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:40:10,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:40:10,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:40:10,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:40:10,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:40:10,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:40:10,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:40:10,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:40:10,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:40:10,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:40:10,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:40:10,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:40:10,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:40:10,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:40:10,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:40:10,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:40:10,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:40:10,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:40:10,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:40:10,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:40:10,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:40:10,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:40:10,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:40:10,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:40:10,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:40:10,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:40:10,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:40:10,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:40:10,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:40:10,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:40:10,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:40:10,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:40:10,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:40:10,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:40:10,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:40:10,286 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 18:40:10,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:40:10,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:40:10,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:40:10,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:40:10,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:40:10,330 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:40:10,330 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:40:10,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:40:10,331 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:40:10,331 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:40:10,332 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:40:10,332 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:40:10,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:40:10,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:40:10,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:40:10,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:40:10,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:40:10,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:40:10,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:40:10,335 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:40:10,335 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:40:10,335 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:40:10,335 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:40:10,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:40:10,336 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:40:10,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:40:10,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:40:10,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:40:10,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:40:10,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:40:10,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:40:10,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:40:10,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:40:10,338 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:40:10,338 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:40:10,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:40:10,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:40:10,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:40:10,339 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_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30f6a485d859f7eee00a1696279d966456b3a38851c6233a0367f621da73d6bd [2021-11-25 18:40:10,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:40:10,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:40:10,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:40:10,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:40:10,772 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:40:10,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/interpolation.c [2021-11-25 18:40:10,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/data/2d870566d/700502e02c5347b9b670913c3073a978/FLAGb3d655909 [2021-11-25 18:40:11,345 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:40:11,346 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/sv-benchmarks/c/float-benchs/interpolation.c [2021-11-25 18:40:11,352 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/data/2d870566d/700502e02c5347b9b670913c3073a978/FLAGb3d655909 [2021-11-25 18:40:11,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/data/2d870566d/700502e02c5347b9b670913c3073a978 [2021-11-25 18:40:11,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:40:11,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:40:11,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:40:11,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:40:11,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:40:11,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:40:11" (1/1) ... [2021-11-25 18:40:11,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41179208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:11, skipping insertion in model container [2021-11-25 18:40:11,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:40:11" (1/1) ... [2021-11-25 18:40:11,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:40:11,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:40:11,918 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/sv-benchmarks/c/float-benchs/interpolation.c[449,462] [2021-11-25 18:40:11,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:40:11,950 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:40:11,962 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/sv-benchmarks/c/float-benchs/interpolation.c[449,462] [2021-11-25 18:40:11,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:40:12,017 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:40:12,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12 WrapperNode [2021-11-25 18:40:12,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:40:12,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:40:12,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:40:12,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:40:12,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (1/1) ... [2021-11-25 18:40:12,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (1/1) ... [2021-11-25 18:40:12,099 INFO L137 Inliner]: procedures = 19, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2021-11-25 18:40:12,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:40:12,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:40:12,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:40:12,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:40:12,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (1/1) ... [2021-11-25 18:40:12,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (1/1) ... [2021-11-25 18:40:12,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (1/1) ... [2021-11-25 18:40:12,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (1/1) ... [2021-11-25 18:40:12,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (1/1) ... [2021-11-25 18:40:12,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (1/1) ... [2021-11-25 18:40:12,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (1/1) ... [2021-11-25 18:40:12,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:40:12,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:40:12,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:40:12,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:40:12,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (1/1) ... [2021-11-25 18:40:12,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:40:12,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:12,191 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:40:12,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:40:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:40:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4 [2021-11-25 18:40:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:40:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:40:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2021-11-25 18:40:12,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:40:12,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:40:12,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:40:12,310 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:40:12,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:40:13,812 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:40:13,818 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:40:13,818 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:40:13,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:40:13 BoogieIcfgContainer [2021-11-25 18:40:13,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:40:13,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:40:13,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:40:13,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:40:13,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:40:11" (1/3) ... [2021-11-25 18:40:13,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d21719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:40:13, skipping insertion in model container [2021-11-25 18:40:13,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:12" (2/3) ... [2021-11-25 18:40:13,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d21719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:40:13, skipping insertion in model container [2021-11-25 18:40:13,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:40:13" (3/3) ... [2021-11-25 18:40:13,829 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c [2021-11-25 18:40:13,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:40:13,840 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:40:13,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:40:13,925 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 [2021-11-25 18:40:13,926 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:40:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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) [2021-11-25 18:40:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:40:13,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:13,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:13,947 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:13,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1235833265, now seen corresponding path program 1 times [2021-11-25 18:40:13,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:40:13,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473037605] [2021-11-25 18:40:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:13,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:40:13,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:40:13,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:40:13,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:40:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:14,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 18:40:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:14,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:40:14,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:40:14,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473037605] [2021-11-25 18:40:14,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473037605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:14,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:14,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:40:14,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805604948] [2021-11-25 18:40:14,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:14,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:40:14,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:40:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:40:14,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:40:14,594 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:14,610 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-11-25 18:40:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:40:14,613 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:40:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:14,628 INFO L225 Difference]: With dead ends: 29 [2021-11-25 18:40:14,629 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:40:14,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:40:14,637 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:14,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:40:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:40:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 18:40:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-11-25 18:40:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-25 18:40:14,669 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-25 18:40:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:14,670 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-25 18:40:14,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-25 18:40:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:40:14,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:14,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:14,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:14,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:40:14,890 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:14,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:14,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1178902664, now seen corresponding path program 1 times [2021-11-25 18:40:14,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:40:14,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877769331] [2021-11-25 18:40:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:14,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:40:14,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:40:14,900 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:40:14,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:40:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:15,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:40:15,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:15,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:40:15,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:40:15,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877769331] [2021-11-25 18:40:15,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877769331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:15,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:15,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:40:15,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352497834] [2021-11-25 18:40:15,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:15,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:40:15,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:40:15,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:40:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:15,413 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:17,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:40:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:17,615 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-25 18:40:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:40:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:40:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:17,617 INFO L225 Difference]: With dead ends: 21 [2021-11-25 18:40:17,617 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 18:40:17,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:17,619 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:17,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 18:40:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 18:40:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2021-11-25 18:40:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-11-25 18:40:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-25 18:40:17,624 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-11-25 18:40:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:17,624 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-25 18:40:17,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-25 18:40:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:40:17,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:17,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:17,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:17,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:40:17,843 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2110328889, now seen corresponding path program 1 times [2021-11-25 18:40:17,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:40:17,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944686558] [2021-11-25 18:40:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:17,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:40:17,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:40:17,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:40:17,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:40:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:40:18,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:21,010 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:40:21,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 392 treesize of output 192 [2021-11-25 18:43:02,035 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse2 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse0 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (fp.leq |ULTIMATE.start_main_~t~0#1| .cse0) (let ((.cse1 (fp.leq (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~t~0#1| .cse2) (fp.sub roundNearestTiesToEven .cse0 .cse2)) ((_ to_fp 8 24) roundNearestTiesToEven 1.0)))) (or (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32)) .cse1) (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv0 32)) (not .cse1)))) (fp.geq |ULTIMATE.start_main_~t~0#1| .cse2) (= .cse2 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse0)))) is different from false [2021-11-25 18:43:04,054 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse2 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse0 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (fp.leq |ULTIMATE.start_main_~t~0#1| .cse0) (let ((.cse1 (fp.leq (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~t~0#1| .cse2) (fp.sub roundNearestTiesToEven .cse0 .cse2)) ((_ to_fp 8 24) roundNearestTiesToEven 1.0)))) (or (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32)) .cse1) (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv0 32)) (not .cse1)))) (fp.geq |ULTIMATE.start_main_~t~0#1| .cse2) (= .cse2 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse0)))) is different from true [2021-11-25 18:43:57,700 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse1 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse0 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (fp.leq |ULTIMATE.start_main_~t~0#1| .cse0) (fp.geq |ULTIMATE.start_main_~t~0#1| .cse1) (= .cse1 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (not (fp.leq (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub roundNearestTiesToEven .cse0 .cse1)) ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse0)))) is different from false [2021-11-25 18:43:59,718 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_1 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1| (_ FloatingPoint 8 24)) (v_arrayElimCell_3 (_ BitVec 32))) (let ((.cse1 (fp ((_ extract 31 31) v_arrayElimCell_1) ((_ extract 30 23) v_arrayElimCell_1) ((_ extract 22 0) v_arrayElimCell_1))) (.cse0 (fp ((_ extract 31 31) v_arrayElimCell_3) ((_ extract 30 23) v_arrayElimCell_3) ((_ extract 22 0) v_arrayElimCell_3)))) (and (fp.leq |ULTIMATE.start_main_~t~0#1| .cse0) (fp.geq |ULTIMATE.start_main_~t~0#1| .cse1) (= .cse1 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv5 32))) (not (fp.leq (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub roundNearestTiesToEven .cse0 .cse1)) ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (= ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32)) .cse0)))) is different from true [2021-11-25 18:43:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:43:59,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:43:59,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:43:59,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944686558] [2021-11-25 18:43:59,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944686558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:43:59,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:43:59,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 18:43:59,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974205403] [2021-11-25 18:43:59,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:43:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:43:59,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:43:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:43:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=61, Unknown=4, NotChecked=34, Total=132 [2021-11-25 18:43:59,722 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 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) [2021-11-25 18:44:03,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:44:03,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:44:03,635 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-25 18:44:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:44:03,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 18:44:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:44:03,637 INFO L225 Difference]: With dead ends: 28 [2021-11-25 18:44:03,638 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 18:44:03,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=77, Invalid=167, Unknown=4, NotChecked=58, Total=306 [2021-11-25 18:44:03,640 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:44:03,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 18 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 1 Unknown, 33 Unchecked, 2.6s Time] [2021-11-25 18:44:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 18:44:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-11-25 18:44:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2021-11-25 18:44:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-25 18:44:03,646 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2021-11-25 18:44:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:44:03,646 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-25 18:44:03,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 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) [2021-11-25 18:44:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-25 18:44:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:44:03,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:44:03,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:44:03,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:44:03,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:44:03,849 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:44:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:44:03,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1504580037, now seen corresponding path program 1 times [2021-11-25 18:44:03,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:44:03,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660616955] [2021-11-25 18:44:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:44:03,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:44:03,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:44:03,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:44:03,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:44:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:44:04,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:44:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:44:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:44:04,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:44:04,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:44:04,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660616955] [2021-11-25 18:44:04,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660616955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:44:04,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:44:04,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:44:04,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349717239] [2021-11-25 18:44:04,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:44:04,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:44:04,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:44:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:44:04,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:44:04,215 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-25 18:44:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:44:04,266 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-11-25 18:44:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:44:04,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 18:44:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:44:04,268 INFO L225 Difference]: With dead ends: 26 [2021-11-25 18:44:04,268 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 18:44:04,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:44:04,270 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:44:04,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:44:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 18:44:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 18:44:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2021-11-25 18:44:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-25 18:44:04,276 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-11-25 18:44:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:44:04,276 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-25 18:44:04,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-25 18:44:04,277 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-25 18:44:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:44:04,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:44:04,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:44:04,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:44:04,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:44:04,495 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:44:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:44:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash 854582592, now seen corresponding path program 1 times [2021-11-25 18:44:04,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:44:04,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618749915] [2021-11-25 18:44:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:44:04,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:44:04,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:44:04,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:44:04,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:44:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:44:04,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:44:04,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:44:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:44:04,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:44:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:44:04,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:44:04,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618749915] [2021-11-25 18:44:04,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618749915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:44:04,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1789542786] [2021-11-25 18:44:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:44:04,943 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:44:04,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:44:04,944 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:44:04,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-25 18:44:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:44:05,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:44:05,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:44:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:44:05,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:44:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:44:05,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1789542786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:44:05,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107208997] [2021-11-25 18:44:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:44:05,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:44:05,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:44:05,615 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:44:05,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:44:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:44:05,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:44:05,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:44:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:44:05,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:44:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:44:06,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107208997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:44:06,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:44:06,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 7 [2021-11-25 18:44:06,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339192251] [2021-11-25 18:44:06,071 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:44:06,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:44:06,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:44:06,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:44:06,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:44:06,073 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-11-25 18:44:09,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:44:11,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:44:13,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:44:14,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:44:14,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:44:14,667 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-11-25 18:44:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:44:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 13 [2021-11-25 18:44:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:44:14,717 INFO L225 Difference]: With dead ends: 39 [2021-11-25 18:44:14,717 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 18:44:14,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:44:14,719 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:44:14,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2021-11-25 18:44:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 18:44:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-11-25 18:44:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:44:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-25 18:44:14,728 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2021-11-25 18:44:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:44:14,728 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-25 18:44:14,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-11-25 18:44:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-25 18:44:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:44:14,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:44:14,730 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:44:14,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:44:14,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:44:15,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-25 18:44:15,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:44:15,336 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:44:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:44:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash 723862385, now seen corresponding path program 1 times [2021-11-25 18:44:15,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:44:15,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555722025] [2021-11-25 18:44:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:44:15,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:44:15,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:44:15,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:44:15,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 18:44:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:44:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 18:44:15,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:44:19,924 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-25 18:44:19,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 439 treesize of output 215 [2021-11-25 18:45:22,382 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 18:45:33,695 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_8 (_ BitVec 32)) (v_arrayElimCell_7 (_ BitVec 32)) (v_arrayElimCell_4 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 (fp ((_ extract 31 31) v_arrayElimCell_8) ((_ extract 30 23) v_arrayElimCell_8) ((_ extract 22 0) v_arrayElimCell_8))) (.cse3 (fp ((_ extract 31 31) v_arrayElimCell_7) ((_ extract 30 23) v_arrayElimCell_7) ((_ extract 22 0) v_arrayElimCell_7))) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv10 32))) (.cse2 (fp ((_ extract 31 31) v_arrayElimCell_4) ((_ extract 30 23) v_arrayElimCell_4) ((_ extract 22 0) v_arrayElimCell_4)))) (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32)) (not (fp.leq |ULTIMATE.start_main_~t~0#1| .cse0)) (= .cse0 .cse1) (fp.leq (fp.div roundNearestTiesToEven (fp.sub roundNearestTiesToEven |ULTIMATE.start_main_~t~0#1| .cse2) (fp.sub roundNearestTiesToEven .cse3 .cse2)) ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (= .cse3 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv12 32))) (= .cse1 .cse2)))) is different from false [2021-11-25 18:45:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:45:33,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:45:44,106 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse3 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse1 (let ((.cse4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd |c_ULTIMATE.start_main_~#min~0#1.offset| .cse3)))) (fp ((_ extract 31 31) .cse4) ((_ extract 30 23) .cse4) ((_ extract 22 0) .cse4))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub c_currentRoundingMode (let ((.cse2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|) (bvadd |c_ULTIMATE.start_main_~#max~0#1.offset| .cse3)))) (fp ((_ extract 31 31) .cse2) ((_ extract 30 23) .cse2) ((_ extract 22 0) .cse2))) .cse1)))))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0)))) is different from false [2021-11-25 18:46:44,632 WARN L227 SmtUtils]: Spent 20.55s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:46:58,448 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse2 (let ((.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|) (bvadd |c_ULTIMATE.start_main_~#max~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse5) ((_ extract 30 23) .cse5) ((_ extract 22 0) .cse5))))) (or (let ((.cse0 (let ((.cse1 (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd |c_ULTIMATE.start_main_~#min~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1))))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse2))))) is different from false [2021-11-25 18:47:00,489 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse2 (let ((.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|) (bvadd |c_ULTIMATE.start_main_~#max~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse5) ((_ extract 30 23) .cse5) ((_ extract 22 0) .cse5))))) (or (let ((.cse0 (let ((.cse1 (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd |c_ULTIMATE.start_main_~#min~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1))))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse2))))) is different from true [2021-11-25 18:47:13,429 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse2 (let ((.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#max~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse5) ((_ extract 30 23) .cse5) ((_ extract 22 0) .cse5))))) (or (let ((.cse0 (let ((.cse1 (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#min~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1))))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse2))))) is different from false [2021-11-25 18:47:29,885 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse2 (let ((.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#max~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse5) ((_ extract 30 23) .cse5) ((_ extract 22 0) .cse5))))) (or (let ((.cse0 (let ((.cse1 (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#min~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1))))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse2)) (fp.leq |c_ULTIMATE.start_main_~t~0#1| |c_ULTIMATE.start_main_#t~mem9#1|)))) is different from false [2021-11-25 18:47:31,925 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse2 (let ((.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#max~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse5) ((_ extract 30 23) .cse5) ((_ extract 22 0) .cse5))))) (or (let ((.cse0 (let ((.cse1 (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#min~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1))))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse2)) (fp.leq |c_ULTIMATE.start_main_~t~0#1| |c_ULTIMATE.start_main_#t~mem9#1|)))) is different from true [2021-11-25 18:47:47,861 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|)) (.cse2 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse5 (let ((.cse7 (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#max~0#1.offset| .cse2)))) (fp ((_ extract 31 31) .cse7) ((_ extract 30 23) .cse7) ((_ extract 22 0) .cse7))))) (or (fp.leq |c_ULTIMATE.start_main_~t~0#1| (let ((.cse0 (select .cse1 (bvadd |c_ULTIMATE.start_main_~#max~0#1.offset| .cse2)))) (fp ((_ extract 31 31) .cse0) ((_ extract 30 23) .cse0) ((_ extract 22 0) .cse0)))) (let ((.cse3 (let ((.cse4 (let ((.cse6 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#min~0#1.offset| .cse2)))) (fp ((_ extract 31 31) .cse6) ((_ extract 30 23) .cse6) ((_ extract 22 0) .cse6))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse4) (fp.sub c_currentRoundingMode .cse5 .cse4))))) (and (fp.geq .cse3 (_ +zero 8 24)) (fp.leq .cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse5))))) is different from true [2021-11-25 18:48:05,730 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|))) (let ((.cse2 (let ((.cse6 (select .cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#max~0#1.offset|)))) (fp ((_ extract 31 31) .cse6) ((_ extract 30 23) .cse6) ((_ extract 22 0) .cse6))))) (or (let ((.cse0 (let ((.cse1 (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#min~0#1.offset|)))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1))))) (and (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0)) (fp.geq .cse0 (_ +zero 8 24)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse2)) (fp.leq |c_ULTIMATE.start_main_~t~0#1| (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~#max~0#1.offset|))) (fp ((_ extract 31 31) .cse4) ((_ extract 30 23) .cse4) ((_ extract 22 0) .cse4))))))) is different from false [2021-11-25 18:48:28,060 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|))) (let ((.cse2 (let ((.cse6 (select .cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#max~0#1.offset|)))) (fp ((_ extract 31 31) .cse6) ((_ extract 30 23) .cse6) ((_ extract 22 0) .cse6))))) (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (let ((.cse1 (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#min~0#1.offset|)))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1))))) (and (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0)) (fp.geq .cse0 (_ +zero 8 24)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse2)) (fp.leq |c_ULTIMATE.start_main_~t~0#1| (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~#max~0#1.offset|))) (fp ((_ extract 31 31) .cse4) ((_ extract 30 23) .cse4) ((_ extract 22 0) .cse4))))))) is different from true [2021-11-25 18:48:49,759 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|))) (let ((.cse2 (let ((.cse6 (select .cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#max~0#1.offset|)))) (fp ((_ extract 31 31) .cse6) ((_ extract 30 23) .cse6) ((_ extract 22 0) .cse6))))) (or (let ((.cse0 (let ((.cse1 (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#min~0#1.offset|)))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1))))) (and (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0)) (fp.geq .cse0 (_ +zero 8 24)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse2)) (not |c_ULTIMATE.start_main_#t~short7#1|) (fp.leq |c_ULTIMATE.start_main_~t~0#1| (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~#max~0#1.offset|))) (fp ((_ extract 31 31) .cse4) ((_ extract 30 23) .cse4) ((_ extract 22 0) .cse4))))))) is different from true [2021-11-25 18:49:08,529 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|))) (let ((.cse4 (let ((.cse7 (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#max~0#1.offset|)))) (fp ((_ extract 31 31) .cse7) ((_ extract 30 23) .cse7) ((_ extract 22 0) .cse7))))) (or (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| (let ((.cse0 (select .cse1 (bvadd (_ bv16 32) |c_ULTIMATE.start_main_~#max~0#1.offset|)))) (fp ((_ extract 31 31) .cse0) ((_ extract 30 23) .cse0) ((_ extract 22 0) .cse0))))) (let ((.cse2 (let ((.cse3 (let ((.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#min~0#1.offset|)))) (fp ((_ extract 31 31) .cse5) ((_ extract 30 23) .cse5) ((_ extract 22 0) .cse5))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse3) (fp.sub c_currentRoundingMode .cse4 .cse3))))) (and (fp.leq .cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0)) (fp.geq .cse2 (_ +zero 8 24)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse4)) (not |c_ULTIMATE.start_main_#t~short7#1|) (fp.leq |c_ULTIMATE.start_main_~t~0#1| (let ((.cse6 (select .cse1 |c_ULTIMATE.start_main_~#max~0#1.offset|))) (fp ((_ extract 31 31) .cse6) ((_ extract 30 23) .cse6) ((_ extract 22 0) .cse6))))))) is different from true [2021-11-25 18:49:11,810 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 18:49:11,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 343 treesize of output 1 [2021-11-25 18:49:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 18:49:11,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:49:11,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555722025] [2021-11-25 18:49:11,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555722025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:49:11,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [308438279] [2021-11-25 18:49:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:11,814 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:49:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:49:11,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:49:11,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-25 18:49:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:12,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:49:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:49:33,834 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-25 18:49:33,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 416 treesize of output 204 [2021-11-25 18:50:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:50:29,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:52:37,012 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 18:52:37,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 1 [2021-11-25 18:52:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 18:52:37,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [308438279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:52:37,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354368094] [2021-11-25 18:52:37,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:37,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:37,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:37,018 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:52:37,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e76e8c74-6b51-49e5-aaa5-84af2f066fb7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:52:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:40,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 18:52:40,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:05,512 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-25 18:53:05,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 416 treesize of output 204 [2021-11-25 18:53:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:55,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:31,876 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse2 (let ((.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#max~0#1.base|) (bvadd |c_ULTIMATE.start_main_~#max~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse5) ((_ extract 30 23) .cse5) ((_ extract 22 0) .cse5))))) (or (let ((.cse0 (let ((.cse1 (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#min~0#1.base|) (bvadd |c_ULTIMATE.start_main_~#min~0#1.offset| .cse4)))) (fp ((_ extract 31 31) .cse3) ((_ extract 30 23) .cse3) ((_ extract 22 0) .cse3))))) (fp.div c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~t~0#1| .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1))))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.leq .cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0)))) (not (fp.leq |c_ULTIMATE.start_main_~t~0#1| .cse2)) (not (bvult |c_ULTIMATE.start_main_~i~0#1| (_ bv5 32)))))) is different from false