./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan --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 38561929b5142acce65cab4da64e7c4ae5f17524 ...................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan --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 38561929b5142acce65cab4da64e7c4ae5f17524 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 10:03:12,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:03:12,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:03:12,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:03:12,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:03:12,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:03:12,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:03:12,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:03:12,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:03:12,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:03:12,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:03:12,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:03:12,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:03:12,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:03:12,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:03:12,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:03:12,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:03:12,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:03:12,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:03:12,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:03:12,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:03:12,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:03:12,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:03:12,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:03:12,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:03:12,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:03:12,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:03:12,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:03:12,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:03:12,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:03:12,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:03:12,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:03:12,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:03:12,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:03:12,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:03:12,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:03:12,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:03:12,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:03:12,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:03:12,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:03:12,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:03:12,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:03:12,194 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:03:12,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:03:12,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:03:12,195 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:03:12,195 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:03:12,195 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:03:12,195 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:03:12,195 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:03:12,196 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:03:12,196 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:03:12,196 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:03:12,196 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:03:12,196 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:03:12,197 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:03:12,197 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:03:12,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:03:12,198 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:03:12,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:03:12,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:03:12,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:03:12,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:03:12,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:03:12,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:03:12,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:03:12,199 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:03:12,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:03:12,199 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:03:12,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:03:12,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:03:12,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:03:12,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:03:12,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:03:12,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:03:12,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:03:12,201 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:03:12,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:03:12,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:03:12,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:03:12,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:03:12,201 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-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-12-09 10:03:12,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:03:12,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:03:12,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:03:12,431 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:03:12,431 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:03:12,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-12-09 10:03:12,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/data/52d6f809e/600ed63ce6fb495fb8b97e4de854dbd2/FLAGeb58b7be6 [2020-12-09 10:03:12,825 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:03:12,825 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-12-09 10:03:12,830 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/data/52d6f809e/600ed63ce6fb495fb8b97e4de854dbd2/FLAGeb58b7be6 [2020-12-09 10:03:12,842 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/data/52d6f809e/600ed63ce6fb495fb8b97e4de854dbd2 [2020-12-09 10:03:12,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:03:12,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:03:12,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:03:12,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:03:12,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:03:12,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:03:12" (1/1) ... [2020-12-09 10:03:12,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55436f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:12, skipping insertion in model container [2020-12-09 10:03:12,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:03:12" (1/1) ... [2020-12-09 10:03:12,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:03:12,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:03:13,005 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2020-12-09 10:03:13,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:03:13,013 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:03:13,028 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2020-12-09 10:03:13,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:03:13,039 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:03:13,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13 WrapperNode [2020-12-09 10:03:13,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:03:13,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:03:13,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:03:13,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:03:13,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (1/1) ... [2020-12-09 10:03:13,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (1/1) ... [2020-12-09 10:03:13,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:03:13,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:03:13,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:03:13,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:03:13,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (1/1) ... [2020-12-09 10:03:13,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (1/1) ... [2020-12-09 10:03:13,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (1/1) ... [2020-12-09 10:03:13,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (1/1) ... [2020-12-09 10:03:13,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (1/1) ... [2020-12-09 10:03:13,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (1/1) ... [2020-12-09 10:03:13,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (1/1) ... [2020-12-09 10:03:13,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:03:13,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:03:13,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:03:13,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:03:13,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:03:13,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:03:13,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:03:13,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-09 10:03:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:03:13,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:03:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 10:03:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 10:03:13,547 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:03:13,548 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-09 10:03:13,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:13 BoogieIcfgContainer [2020-12-09 10:03:13,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:03:13,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:03:13,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:03:13,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:03:13,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:03:12" (1/3) ... [2020-12-09 10:03:13,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b088b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:03:13, skipping insertion in model container [2020-12-09 10:03:13,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:13" (2/3) ... [2020-12-09 10:03:13,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b088b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:03:13, skipping insertion in model container [2020-12-09 10:03:13,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:13" (3/3) ... [2020-12-09 10:03:13,555 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-12-09 10:03:13,565 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:03:13,568 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:03:13,575 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 10:03:13,591 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:03:13,591 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:03:13,592 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:03:13,592 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:03:13,592 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:03:13,592 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:03:13,592 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:03:13,592 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:03:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 10:03:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 10:03:13,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:03:13,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:03:13,605 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:03:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:03:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2020-12-09 10:03:13,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:03:13,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003660095] [2020-12-09 10:03:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:03:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:03:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:03:13,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003660095] [2020-12-09 10:03:13,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:03:13,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:03:13,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562193642] [2020-12-09 10:03:13,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 10:03:13,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:03:13,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 10:03:13,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 10:03:13,720 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-09 10:03:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:03:13,731 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2020-12-09 10:03:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 10:03:13,732 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 10:03:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:03:13,737 INFO L225 Difference]: With dead ends: 35 [2020-12-09 10:03:13,738 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 10:03:13,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 10:03:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 10:03:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 10:03:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 10:03:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-09 10:03:13,761 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2020-12-09 10:03:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:03:13,761 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-09 10:03:13,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 10:03:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-09 10:03:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 10:03:13,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:03:13,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:03:13,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:03:13,762 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:03:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:03:13,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2020-12-09 10:03:13,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:03:13,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641780088] [2020-12-09 10:03:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:03:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:03:13,793 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:03:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:03:13,815 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:03:13,830 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 10:03:13,831 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 10:03:13,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 10:03:13,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:03:13 BoogieIcfgContainer [2020-12-09 10:03:13,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:03:13,849 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:03:13,849 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:03:13,849 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:03:13,849 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:13" (3/4) ... [2020-12-09 10:03:13,851 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 10:03:13,851 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:03:13,853 INFO L168 Benchmark]: Toolchain (without parser) took 1006.68 ms. Allocated memory is still 83.9 MB. Free memory was 45.3 MB in the beginning and 37.5 MB in the end (delta: 7.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:13,853 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 83.9 MB. Free memory is still 61.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:03:13,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.43 ms. Allocated memory is still 83.9 MB. Free memory was 45.1 MB in the beginning and 56.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:13,854 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.10 ms. Allocated memory is still 83.9 MB. Free memory was 56.8 MB in the beginning and 55.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:13,855 INFO L168 Benchmark]: Boogie Preprocessor took 25.99 ms. Allocated memory is still 83.9 MB. Free memory was 55.0 MB in the beginning and 53.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:13,855 INFO L168 Benchmark]: RCFGBuilder took 447.28 ms. Allocated memory is still 83.9 MB. Free memory was 53.5 MB in the beginning and 60.5 MB in the end (delta: -7.0 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:13,856 INFO L168 Benchmark]: TraceAbstraction took 297.74 ms. Allocated memory is still 83.9 MB. Free memory was 60.0 MB in the beginning and 37.9 MB in the end (delta: 22.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:13,856 INFO L168 Benchmark]: Witness Printer took 2.87 ms. Allocated memory is still 83.9 MB. Free memory was 37.9 MB in the beginning and 37.5 MB in the end (delta: 388.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:03:13,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 83.9 MB. Free memory is still 61.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.43 ms. Allocated memory is still 83.9 MB. Free memory was 45.1 MB in the beginning and 56.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.10 ms. Allocated memory is still 83.9 MB. Free memory was 56.8 MB in the beginning and 55.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.99 ms. Allocated memory is still 83.9 MB. Free memory was 55.0 MB in the beginning and 53.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 447.28 ms. Allocated memory is still 83.9 MB. Free memory was 53.5 MB in the beginning and 60.5 MB in the end (delta: -7.0 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 297.74 ms. Allocated memory is still 83.9 MB. Free memory was 60.0 MB in the beginning and 37.9 MB in the end (delta: 22.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 2.87 ms. Allocated memory is still 83.9 MB. Free memory was 37.9 MB in the beginning and 37.5 MB in the end (delta: 388.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 72]: 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 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 10:03:15,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:03:15,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:03:15,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:03:15,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:03:15,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:03:15,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:03:15,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:03:15,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:03:15,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:03:15,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:03:15,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:03:15,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:03:15,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:03:15,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:03:15,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:03:15,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:03:15,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:03:15,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:03:15,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:03:15,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:03:15,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:03:15,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:03:15,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:03:15,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:03:15,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:03:15,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:03:15,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:03:15,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:03:15,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:03:15,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:03:15,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:03:15,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:03:15,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:03:15,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:03:15,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:03:15,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:03:15,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:03:15,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:03:15,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:03:15,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:03:15,559 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 10:03:15,584 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:03:15,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:03:15,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:03:15,585 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:03:15,585 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:03:15,585 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:03:15,585 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:03:15,585 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:03:15,585 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:03:15,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:03:15,586 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:03:15,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:03:15,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:03:15,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:03:15,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:03:15,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:03:15,587 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:03:15,587 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 10:03:15,587 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 10:03:15,587 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:03:15,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:03:15,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:03:15,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:03:15,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:03:15,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 10:03:15,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:03:15,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:03:15,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:03:15,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:03:15,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:03:15,589 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 10:03:15,589 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 10:03:15,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:03:15,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:03:15,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:03:15,589 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-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-12-09 10:03:15,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:03:15,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:03:15,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:03:15,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:03:15,862 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:03:15,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-12-09 10:03:15,907 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/data/e89ed2035/2785cbbf85d24d598e3661069892d1c1/FLAGe2db44a72 [2020-12-09 10:03:16,325 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:03:16,326 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-12-09 10:03:16,332 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/data/e89ed2035/2785cbbf85d24d598e3661069892d1c1/FLAGe2db44a72 [2020-12-09 10:03:16,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/data/e89ed2035/2785cbbf85d24d598e3661069892d1c1 [2020-12-09 10:03:16,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:03:16,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:03:16,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:03:16,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:03:16,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:03:16,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347b85e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16, skipping insertion in model container [2020-12-09 10:03:16,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:03:16,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:03:16,476 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2020-12-09 10:03:16,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:03:16,488 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:03:16,504 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2020-12-09 10:03:16,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:03:16,517 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:03:16,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16 WrapperNode [2020-12-09 10:03:16,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:03:16,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:03:16,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:03:16,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:03:16,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:03:16,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:03:16,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:03:16,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:03:16,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (1/1) ... [2020-12-09 10:03:16,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:03:16,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:03:16,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:03:16,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:03:16,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:03:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 10:03:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:03:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 10:03:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:03:16,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:03:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-12-09 10:03:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 10:03:16,905 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:03:16,905 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-09 10:03:16,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:16 BoogieIcfgContainer [2020-12-09 10:03:16,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:03:16,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:03:16,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:03:16,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:03:16,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:03:16" (1/3) ... [2020-12-09 10:03:16,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180b81e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:03:16, skipping insertion in model container [2020-12-09 10:03:16,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:16" (2/3) ... [2020-12-09 10:03:16,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180b81e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:03:16, skipping insertion in model container [2020-12-09 10:03:16,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:16" (3/3) ... [2020-12-09 10:03:16,912 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-12-09 10:03:16,923 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:03:16,925 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:03:16,933 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 10:03:16,950 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:03:16,951 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:03:16,951 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:03:16,951 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:03:16,951 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:03:16,951 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:03:16,951 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:03:16,951 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:03:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-09 10:03:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 10:03:16,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:03:16,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:03:16,967 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:03:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:03:16,971 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-09 10:03:16,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:03:16,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117360274] [2020-12-09 10:03:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 10:03:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:03:17,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 10:03:17,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:03:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:03:17,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 10:03:17,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117360274] [2020-12-09 10:03:17,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:03:17,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:03:17,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652034933] [2020-12-09 10:03:17,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 10:03:17,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 10:03:17,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 10:03:17,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 10:03:17,088 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-09 10:03:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:03:17,101 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-09 10:03:17,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 10:03:17,102 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-09 10:03:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:03:17,108 INFO L225 Difference]: With dead ends: 62 [2020-12-09 10:03:17,108 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 10:03:17,110 INFO L677 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 [2020-12-09 10:03:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 10:03:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 10:03:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 10:03:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-09 10:03:17,134 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-09 10:03:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:03:17,134 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-09 10:03:17,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 10:03:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-09 10:03:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 10:03:17,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:03:17,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:03:17,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 10:03:17,336 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:03:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:03:17,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-09 10:03:17,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:03:17,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118003963] [2020-12-09 10:03:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 10:03:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:03:17,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:03:17,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:03:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:03:17,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 10:03:17,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118003963] [2020-12-09 10:03:17,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:03:17,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 10:03:17,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940784345] [2020-12-09 10:03:17,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:03:17,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 10:03:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:03:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:03:17,429 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-12-09 10:03:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:03:17,484 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-09 10:03:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:03:17,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 10:03:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:03:17,485 INFO L225 Difference]: With dead ends: 53 [2020-12-09 10:03:17,485 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 10:03:17,486 INFO L677 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 [2020-12-09 10:03:17,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 10:03:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-09 10:03:17,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 10:03:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-09 10:03:17,493 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-09 10:03:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:03:17,493 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-09 10:03:17,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:03:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-09 10:03:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 10:03:17,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:03:17,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:03:17,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 10:03:17,696 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:03:17,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:03:17,698 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-12-09 10:03:17,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:03:17,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765585402] [2020-12-09 10:03:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 10:03:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:03:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 10:03:17,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:03:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:03:17,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 10:03:17,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765585402] [2020-12-09 10:03:17,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:03:17,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 10:03:17,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382619557] [2020-12-09 10:03:17,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:03:17,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 10:03:17,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:03:17,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:03:17,904 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-09 10:03:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:03:17,934 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-12-09 10:03:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:03:17,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 10:03:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:03:17,934 INFO L225 Difference]: With dead ends: 50 [2020-12-09 10:03:17,934 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 10:03:17,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:03:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 10:03:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 10:03:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 10:03:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-09 10:03:17,938 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 12 [2020-12-09 10:03:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:03:17,938 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-09 10:03:17,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:03:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-09 10:03:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 10:03:17,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:03:17,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:03:18,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 10:03:18,140 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:03:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:03:18,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-12-09 10:03:18,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:03:18,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098407405] [2020-12-09 10:03:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 10:03:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:03:18,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:03:18,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:03:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:03:18,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 10:03:18,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098407405] [2020-12-09 10:03:18,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:03:18,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 10:03:18,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017291100] [2020-12-09 10:03:18,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:03:18,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 10:03:18,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:03:18,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:03:18,311 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-12-09 10:03:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:03:18,336 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-12-09 10:03:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:03:18,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 10:03:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:03:18,337 INFO L225 Difference]: With dead ends: 48 [2020-12-09 10:03:18,338 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 10:03:18,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:03:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 10:03:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2020-12-09 10:03:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 10:03:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-09 10:03:18,344 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-12-09 10:03:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:03:18,344 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-09 10:03:18,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:03:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-09 10:03:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 10:03:18,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:03:18,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:03:18,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 10:03:18,547 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:03:18,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:03:18,548 INFO L82 PathProgramCache]: Analyzing trace with hash 874935118, now seen corresponding path program 1 times [2020-12-09 10:03:18,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:03:18,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277813843] [2020-12-09 10:03:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 10:03:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:03:18,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 10:03:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:03:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:03:18,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 10:03:18,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277813843] [2020-12-09 10:03:18,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:03:18,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 10:03:18,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503033403] [2020-12-09 10:03:18,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:03:18,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 10:03:18,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:03:18,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:03:18,744 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-12-09 10:03:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:03:18,779 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-12-09 10:03:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:03:18,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-09 10:03:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:03:18,780 INFO L225 Difference]: With dead ends: 39 [2020-12-09 10:03:18,780 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 10:03:18,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 10:03:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 10:03:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 10:03:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 10:03:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-09 10:03:18,783 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2020-12-09 10:03:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:03:18,783 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-09 10:03:18,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:03:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-09 10:03:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 10:03:18,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:03:18,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:03:18,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 10:03:18,985 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:03:18,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:03:18,986 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-12-09 10:03:18,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:03:18,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40515082] [2020-12-09 10:03:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 10:03:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:03:19,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 10:03:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:03:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:03:19,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 10:03:19,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40515082] [2020-12-09 10:03:19,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:03:19,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:03:19,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748224683] [2020-12-09 10:03:19,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:03:19,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 10:03:19,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:03:19,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:03:19,110 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2020-12-09 10:03:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:03:19,115 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-12-09 10:03:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:03:19,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-09 10:03:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:03:19,116 INFO L225 Difference]: With dead ends: 33 [2020-12-09 10:03:19,117 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 10:03:19,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:03:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 10:03:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 10:03:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 10:03:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-09 10:03:19,119 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2020-12-09 10:03:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:03:19,120 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-09 10:03:19,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:03:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-09 10:03:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 10:03:19,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:03:19,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:03:19,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 10:03:19,322 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:03:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:03:19,323 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-12-09 10:03:19,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:03:19,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914815728] [2020-12-09 10:03:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 10:03:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:03:19,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 10:03:19,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:03:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:03:19,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 10:03:19,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914815728] [2020-12-09 10:03:19,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:03:19,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 10:03:19,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363838721] [2020-12-09 10:03:19,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 10:03:19,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 10:03:19,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 10:03:19,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:03:19,425 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2020-12-09 10:03:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:03:19,476 INFO L93 Difference]: Finished difference Result 26 states and 25 transitions. [2020-12-09 10:03:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 10:03:19,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-09 10:03:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:03:19,477 INFO L225 Difference]: With dead ends: 26 [2020-12-09 10:03:19,477 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 10:03:19,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-09 10:03:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 10:03:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 10:03:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 10:03:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-12-09 10:03:19,481 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 18 [2020-12-09 10:03:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:03:19,481 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-12-09 10:03:19,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 10:03:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-12-09 10:03:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 10:03:19,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:03:19,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:03:19,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 10:03:19,684 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:03:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:03:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-12-09 10:03:19,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:03:19,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979584580] [2020-12-09 10:03:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 10:03:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:03:19,817 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:03:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:03:19,881 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:03:19,917 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 10:03:19,917 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 10:03:20,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 10:03:20,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:03:20 BoogieIcfgContainer [2020-12-09 10:03:20,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:03:20,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:03:20,167 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:03:20,167 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:03:20,168 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:16" (3/4) ... [2020-12-09 10:03:20,170 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 10:03:20,205 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c0dcc648-e885-4d9b-bc5d-1d6e1f21a8a1/bin/utaipan/witness.graphml [2020-12-09 10:03:20,205 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:03:20,206 INFO L168 Benchmark]: Toolchain (without parser) took 3856.93 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 38.2 MB in the beginning and 41.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:20,207 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 58.7 MB. Free memory was 41.8 MB in the beginning and 41.7 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:03:20,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.13 ms. Allocated memory is still 58.7 MB. Free memory was 38.1 MB in the beginning and 27.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:20,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.86 ms. Allocated memory is still 58.7 MB. Free memory was 27.1 MB in the beginning and 42.8 MB in the end (delta: -15.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:20,208 INFO L168 Benchmark]: Boogie Preprocessor took 23.77 ms. Allocated memory is still 58.7 MB. Free memory was 42.6 MB in the beginning and 41.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:03:20,209 INFO L168 Benchmark]: RCFGBuilder took 321.48 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 41.1 MB in the beginning and 51.3 MB in the end (delta: -10.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:20,210 INFO L168 Benchmark]: TraceAbstraction took 3258.93 ms. Allocated memory is still 73.4 MB. Free memory was 51.0 MB in the beginning and 44.6 MB in the end (delta: 6.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:20,210 INFO L168 Benchmark]: Witness Printer took 37.81 ms. Allocated memory is still 73.4 MB. Free memory was 44.6 MB in the beginning and 41.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:03:20,213 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 58.7 MB. Free memory was 41.8 MB in the beginning and 41.7 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 168.13 ms. Allocated memory is still 58.7 MB. Free memory was 38.1 MB in the beginning and 27.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.86 ms. Allocated memory is still 58.7 MB. Free memory was 27.1 MB in the beginning and 42.8 MB in the end (delta: -15.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.77 ms. Allocated memory is still 58.7 MB. Free memory was 42.6 MB in the beginning and 41.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 321.48 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 41.1 MB in the beginning and 51.3 MB in the end (delta: -10.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3258.93 ms. Allocated memory is still 73.4 MB. Free memory was 51.0 MB in the beginning and 44.6 MB in the end (delta: 6.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Witness Printer took 37.81 ms. Allocated memory is still 73.4 MB. Free memory was 44.6 MB in the beginning and 41.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 72]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L38] COND FALSE !(__fpclassify_float(x) == 0) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] EXPR x < y ? x : y [L43] return x < y ? x : y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L47] __uint32_t w; [L50] ieee_float_shape_type gf_u; [L51] gf_u.value = (x) [L52] EXPR gf_u.word [L52] (w) = gf_u.word [L55] return (w & 0x80000000) != 0; [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.1s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 118 SDslu, 217 SDs, 0 SdLazy, 82 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, 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, 7 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 3941 SizeOfPredicates, 27 NumberOfNonLiveVariables, 403 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 proved your program to be incorrect! Received shutdown request...