./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.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_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 a6231fe9945ed231781bef28be0893007c672b08 .......................................................................................................................................................................................................................................................................................................... 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_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 a6231fe9945ed231781bef28be0893007c672b08 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 08:53:40,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:53:40,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:53:41,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:53:41,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:53:41,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:53:41,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:53:41,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:53:41,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:53:41,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:53:41,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:53:41,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:53:41,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:53:41,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:53:41,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:53:41,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:53:41,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:53:41,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:53:41,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:53:41,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:53:41,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:53:41,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:53:41,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:53:41,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:53:41,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:53:41,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:53:41,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:53:41,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:53:41,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:53:41,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:53:41,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:53:41,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:53:41,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:53:41,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:53:41,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:53:41,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:53:41,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:53:41,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:53:41,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:53:41,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:53:41,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:53:41,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 08:53:41,084 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:53:41,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:53:41,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:53:41,085 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:53:41,085 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:53:41,085 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:53:41,086 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:53:41,086 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:53:41,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:53:41,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:53:41,086 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:53:41,087 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:53:41,087 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:53:41,087 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:53:41,087 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:53:41,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:53:41,088 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:53:41,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:53:41,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:53:41,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:53:41,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:53:41,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:53:41,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:53:41,090 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:53:41,090 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:53:41,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:53:41,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:53:41,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:53:41,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:53:41,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:53:41,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:53:41,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:53:41,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:53:41,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:53:41,092 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:53:41,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:53:41,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:53:41,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:53:41,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:53:41,093 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_ada41947-e600-440f-96e2-3627a079bd08/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6231fe9945ed231781bef28be0893007c672b08 [2020-12-09 08:53:41,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:53:41,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:53:41,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:53:41,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:53:41,282 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:53:41,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-12-09 08:53:41,325 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/data/21e0defbd/f829adc6e5b74615b76331093f481ce7/FLAG3a39600bb [2020-12-09 08:53:41,678 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:53:41,679 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-12-09 08:53:41,683 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/data/21e0defbd/f829adc6e5b74615b76331093f481ce7/FLAG3a39600bb [2020-12-09 08:53:41,692 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/data/21e0defbd/f829adc6e5b74615b76331093f481ce7 [2020-12-09 08:53:41,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:53:41,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:53:41,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:53:41,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:53:41,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:53:41,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a2d9c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41, skipping insertion in model container [2020-12-09 08:53:41,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:53:41,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:53:41,833 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_ada41947-e600-440f-96e2-3627a079bd08/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2020-12-09 08:53:41,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:53:41,844 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:53:41,860 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_ada41947-e600-440f-96e2-3627a079bd08/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2020-12-09 08:53:41,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:53:41,871 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:53:41,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41 WrapperNode [2020-12-09 08:53:41,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:53:41,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:53:41,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:53:41,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:53:41,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:53:41,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:53:41,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:53:41,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:53:41,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (1/1) ... [2020-12-09 08:53:41,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:53:41,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:53:41,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:53:41,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:53:41,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 08:53:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:53:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:53:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-09 08:53:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:53:41,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:53:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 08:53:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 08:53:42,424 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:53:42,424 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-09 08:53:42,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:53:42 BoogieIcfgContainer [2020-12-09 08:53:42,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:53:42,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:53:42,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:53:42,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:53:42,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:53:41" (1/3) ... [2020-12-09 08:53:42,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47beb1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:53:42, skipping insertion in model container [2020-12-09 08:53:42,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:41" (2/3) ... [2020-12-09 08:53:42,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47beb1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:53:42, skipping insertion in model container [2020-12-09 08:53:42,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:53:42" (3/3) ... [2020-12-09 08:53:42,434 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-12-09 08:53:42,447 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:53:42,449 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 08:53:42,458 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 08:53:42,476 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:53:42,476 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:53:42,476 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:53:42,476 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:53:42,477 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:53:42,477 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:53:42,477 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:53:42,477 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:53:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 08:53:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 08:53:42,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:42,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:53:42,489 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2020-12-09 08:53:42,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:53:42,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588812649] [2020-12-09 08:53:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:53:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:53:42,602 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 08:53:42,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588812649] [2020-12-09 08:53:42,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:53:42,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:53:42,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426784445] [2020-12-09 08:53:42,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 08:53:42,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:53:42,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 08:53:42,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:53:42,617 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-09 08:53:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:53:42,627 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2020-12-09 08:53:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 08:53:42,628 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 08:53:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:53:42,633 INFO L225 Difference]: With dead ends: 35 [2020-12-09 08:53:42,634 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 08:53:42,636 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 08:53:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 08:53:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 08:53:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 08:53:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-09 08:53:42,656 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2020-12-09 08:53:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:53:42,657 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-09 08:53:42,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 08:53:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-09 08:53:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 08:53:42,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:42,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:53:42,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:53:42,658 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2020-12-09 08:53:42,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:53:42,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800035009] [2020-12-09 08:53:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:53:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:53:42,691 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:53:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:53:42,715 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:53:42,731 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 08:53:42,731 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:53:42,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:53:42,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:53:42 BoogieIcfgContainer [2020-12-09 08:53:42,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:53:42,749 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:53:42,749 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:53:42,749 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:53:42,749 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:53:42" (3/4) ... [2020-12-09 08:53:42,751 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 08:53:42,752 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:53:42,753 INFO L168 Benchmark]: Toolchain (without parser) took 1057.68 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 52.4 MB in the beginning and 57.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2020-12-09 08:53:42,754 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 81.8 MB. Free memory was 40.6 MB in the beginning and 40.5 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:53:42,755 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.51 ms. Allocated memory is still 81.8 MB. Free memory was 52.0 MB in the beginning and 55.9 MB in the end (delta: -3.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:53:42,755 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.22 ms. Allocated memory is still 81.8 MB. Free memory was 55.9 MB in the beginning and 54.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:53:42,755 INFO L168 Benchmark]: Boogie Preprocessor took 19.86 ms. Allocated memory is still 81.8 MB. Free memory was 54.1 MB in the beginning and 52.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:53:42,756 INFO L168 Benchmark]: RCFGBuilder took 505.96 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 52.4 MB in the beginning and 55.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 20.8 MB. Max. memory is 16.1 GB. [2020-12-09 08:53:42,756 INFO L168 Benchmark]: TraceAbstraction took 320.54 ms. Allocated memory is still 98.6 MB. Free memory was 54.5 MB in the beginning and 58.2 MB in the end (delta: -3.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:53:42,757 INFO L168 Benchmark]: Witness Printer took 2.70 ms. Allocated memory is still 98.6 MB. Free memory was 58.2 MB in the beginning and 57.7 MB in the end (delta: 551.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:53:42,759 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 81.8 MB. Free memory was 40.6 MB in the beginning and 40.5 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 176.51 ms. Allocated memory is still 81.8 MB. Free memory was 52.0 MB in the beginning and 55.9 MB in the end (delta: -3.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.22 ms. Allocated memory is still 81.8 MB. Free memory was 55.9 MB in the beginning and 54.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.86 ms. Allocated memory is still 81.8 MB. Free memory was 54.1 MB in the beginning and 52.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 505.96 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 52.4 MB in the beginning and 55.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 20.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 320.54 ms. Allocated memory is still 98.6 MB. Free memory was 54.5 MB in the beginning and 58.2 MB in the end (delta: -3.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.70 ms. Allocated memory is still 98.6 MB. Free memory was 58.2 MB in the beginning and 57.7 MB in the end (delta: 551.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 87]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 86, overapproximation of someUnaryDOUBLEoperation at line 82. Possible FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L38-L39] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L41-L42] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L45-L46] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L49] return 0; [L54] COND TRUE __fpclassify_double(x) == 0 [L55] return y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] 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 08:53:44,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:53:44,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:53:44,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:53:44,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:53:44,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:53:44,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:53:44,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:53:44,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:53:44,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:53:44,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:53:44,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:53:44,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:53:44,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:53:44,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:53:44,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:53:44,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:53:44,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:53:44,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:53:44,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:53:44,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:53:44,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:53:44,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:53:44,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:53:44,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:53:44,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:53:44,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:53:44,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:53:44,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:53:44,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:53:44,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:53:44,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:53:44,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:53:44,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:53:44,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:53:44,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:53:44,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:53:44,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:53:44,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:53:44,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:53:44,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:53:44,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 08:53:44,523 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:53:44,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:53:44,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:53:44,524 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:53:44,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:53:44,525 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:53:44,525 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:53:44,525 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:53:44,525 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:53:44,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:53:44,526 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:53:44,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:53:44,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:53:44,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:53:44,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:53:44,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:53:44,527 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:53:44,527 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 08:53:44,527 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 08:53:44,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:53:44,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:53:44,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:53:44,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:53:44,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:53:44,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 08:53:44,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:53:44,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:53:44,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:53:44,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:53:44,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:53:44,536 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 08:53:44,536 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 08:53:44,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:53:44,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:53:44,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:53:44,537 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_ada41947-e600-440f-96e2-3627a079bd08/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6231fe9945ed231781bef28be0893007c672b08 [2020-12-09 08:53:44,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:53:44,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:53:44,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:53:44,788 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:53:44,788 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:53:44,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-12-09 08:53:44,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/data/4914da406/5ca6c82ef7244769baf70fc5e2bbac13/FLAGd9d1cd216 [2020-12-09 08:53:45,186 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:53:45,186 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-12-09 08:53:45,192 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/data/4914da406/5ca6c82ef7244769baf70fc5e2bbac13/FLAGd9d1cd216 [2020-12-09 08:53:45,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/data/4914da406/5ca6c82ef7244769baf70fc5e2bbac13 [2020-12-09 08:53:45,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:53:45,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:53:45,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:53:45,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:53:45,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:53:45,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5076ef65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45, skipping insertion in model container [2020-12-09 08:53:45,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:53:45,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:53:45,334 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_ada41947-e600-440f-96e2-3627a079bd08/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2020-12-09 08:53:45,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:53:45,345 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:53:45,376 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_ada41947-e600-440f-96e2-3627a079bd08/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2020-12-09 08:53:45,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:53:45,396 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:53:45,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45 WrapperNode [2020-12-09 08:53:45,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:53:45,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:53:45,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:53:45,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:53:45,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:53:45,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:53:45,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:53:45,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:53:45,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (1/1) ... [2020-12-09 08:53:45,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:53:45,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:53:45,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:53:45,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:53:45,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 08:53:45,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-09 08:53:45,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 08:53:45,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:53:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 08:53:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:53:45,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:53:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 08:53:45,785 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:53:45,785 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-09 08:53:45,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:53:45 BoogieIcfgContainer [2020-12-09 08:53:45,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:53:45,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:53:45,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:53:45,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:53:45,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:53:45" (1/3) ... [2020-12-09 08:53:45,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29599781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:53:45, skipping insertion in model container [2020-12-09 08:53:45,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:53:45" (2/3) ... [2020-12-09 08:53:45,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29599781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:53:45, skipping insertion in model container [2020-12-09 08:53:45,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:53:45" (3/3) ... [2020-12-09 08:53:45,792 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-12-09 08:53:45,802 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:53:45,804 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 08:53:45,812 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 08:53:45,830 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:53:45,830 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:53:45,830 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:53:45,830 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:53:45,830 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:53:45,830 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:53:45,830 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:53:45,831 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:53:45,839 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-09 08:53:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 08:53:45,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:45,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:53:45,844 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-09 08:53:45,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:53:45,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143674293] [2020-12-09 08:53:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 08:53:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:53:45,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 08:53:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:53:45,959 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 08:53:45,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:53:45,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143674293] [2020-12-09 08:53:45,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:53:45,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:53:45,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579890183] [2020-12-09 08:53:45,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 08:53:45,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:53:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 08:53:45,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:53:45,975 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-09 08:53:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:53:45,988 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-09 08:53:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 08:53:45,989 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-09 08:53:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:53:45,995 INFO L225 Difference]: With dead ends: 62 [2020-12-09 08:53:45,995 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 08:53:45,997 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 08:53:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 08:53:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 08:53:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 08:53:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-09 08:53:46,020 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-09 08:53:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:53:46,020 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-09 08:53:46,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 08:53:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-09 08:53:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:53:46,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:46,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:53:46,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 08:53:46,222 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:46,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:46,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-09 08:53:46,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:53:46,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072633166] [2020-12-09 08:53:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 08:53:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:53:46,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 08:53:46,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:53:46,303 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 08:53:46,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:53:46,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072633166] [2020-12-09 08:53:46,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:53:46,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:53:46,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732674453] [2020-12-09 08:53:46,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:53:46,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:53:46,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:53:46,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:53:46,306 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-12-09 08:53:46,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:53:46,439 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-09 08:53:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:53:46,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 08:53:46,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:53:46,440 INFO L225 Difference]: With dead ends: 53 [2020-12-09 08:53:46,440 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 08:53:46,441 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 08:53:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 08:53:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-09 08:53:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 08:53:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-09 08:53:46,446 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-09 08:53:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:53:46,446 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-09 08:53:46,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:53:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-09 08:53:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 08:53:46,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:46,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:53:46,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 08:53:46,649 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:46,651 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-12-09 08:53:46,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:53:46,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785294748] [2020-12-09 08:53:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 08:53:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:53:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 08:53:46,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:53:46,798 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 08:53:46,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:53:46,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785294748] [2020-12-09 08:53:46,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:53:46,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:53:46,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956583734] [2020-12-09 08:53:46,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:53:46,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:53:46,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:53:46,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:53:46,799 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-09 08:53:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:53:46,875 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2020-12-09 08:53:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:53:46,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 08:53:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:53:46,877 INFO L225 Difference]: With dead ends: 61 [2020-12-09 08:53:46,877 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 08:53:46,877 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 08:53:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 08:53:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-12-09 08:53:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 08:53:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-09 08:53:46,881 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 12 [2020-12-09 08:53:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:53:46,881 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-09 08:53:46,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:53:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-09 08:53:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 08:53:46,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:46,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:53:47,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 08:53:47,084 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:47,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-12-09 08:53:47,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:53:47,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436350956] [2020-12-09 08:53:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 08:53:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:53:47,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 08:53:47,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:53:47,187 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 08:53:47,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:53:47,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436350956] [2020-12-09 08:53:47,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:53:47,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:53:47,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146008933] [2020-12-09 08:53:47,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:53:47,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:53:47,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:53:47,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:53:47,189 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2020-12-09 08:53:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:53:47,218 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-12-09 08:53:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:53:47,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 08:53:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:53:47,219 INFO L225 Difference]: With dead ends: 52 [2020-12-09 08:53:47,219 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 08:53:47,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 08:53:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 08:53:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2020-12-09 08:53:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 08:53:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-09 08:53:47,224 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 13 [2020-12-09 08:53:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:53:47,225 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-09 08:53:47,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:53:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-09 08:53:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 08:53:47,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:47,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:53:47,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 08:53:47,426 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:47,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-12-09 08:53:47,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:53:47,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458454538] [2020-12-09 08:53:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 08:53:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:53:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 08:53:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:53:47,500 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 08:53:47,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:53:47,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458454538] [2020-12-09 08:53:47,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:53:47,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:53:47,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452454106] [2020-12-09 08:53:47,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:53:47,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:53:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:53:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:53:47,502 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 4 states. [2020-12-09 08:53:47,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:53:47,545 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-12-09 08:53:47,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:53:47,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 08:53:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:53:47,546 INFO L225 Difference]: With dead ends: 52 [2020-12-09 08:53:47,546 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 08:53:47,547 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 08:53:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 08:53:47,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2020-12-09 08:53:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 08:53:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-09 08:53:47,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2020-12-09 08:53:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:53:47,550 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-09 08:53:47,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:53:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-09 08:53:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 08:53:47,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:47,551 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 08:53:47,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 08:53:47,752 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:47,752 INFO L82 PathProgramCache]: Analyzing trace with hash 874935118, now seen corresponding path program 1 times [2020-12-09 08:53:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:53:47,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282498719] [2020-12-09 08:53:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 08:53:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:53:47,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 08:53:47,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:53:47,887 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 08:53:47,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:53:47,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282498719] [2020-12-09 08:53:47,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:53:47,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 08:53:47,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594215502] [2020-12-09 08:53:47,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:53:47,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:53:47,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:53:47,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:53:47,889 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-12-09 08:53:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:53:47,967 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-12-09 08:53:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:53:47,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-09 08:53:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:53:47,969 INFO L225 Difference]: With dead ends: 43 [2020-12-09 08:53:47,969 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 08:53:47,969 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 08:53:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 08:53:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 08:53:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 08:53:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-09 08:53:47,972 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2020-12-09 08:53:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:53:47,972 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-09 08:53:47,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:53:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-09 08:53:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 08:53:47,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:47,973 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 08:53:48,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 08:53:48,175 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-12-09 08:53:48,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:53:48,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606821729] [2020-12-09 08:53:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 08:53:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:53:48,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 08:53:48,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:53:48,308 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 08:53:48,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:53:48,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606821729] [2020-12-09 08:53:48,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:53:48,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:53:48,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958791794] [2020-12-09 08:53:48,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:53:48,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:53:48,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:53:48,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:53:48,310 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2020-12-09 08:53:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:53:48,322 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-12-09 08:53:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:53:48,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-09 08:53:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:53:48,323 INFO L225 Difference]: With dead ends: 39 [2020-12-09 08:53:48,323 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 08:53:48,324 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 08:53:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 08:53:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 08:53:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 08:53:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-12-09 08:53:48,327 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2020-12-09 08:53:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:53:48,327 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-12-09 08:53:48,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:53:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-12-09 08:53:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 08:53:48,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:48,328 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 08:53:48,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 08:53:48,529 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:48,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:48,531 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-12-09 08:53:48,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:53:48,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169331312] [2020-12-09 08:53:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/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 08:53:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:53:48,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:53:48,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:53:48,649 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 08:53:48,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:53:48,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169331312] [2020-12-09 08:53:48,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:53:48,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 08:53:48,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875070048] [2020-12-09 08:53:48,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 08:53:48,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:53:48,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 08:53:48,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 08:53:48,650 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-12-09 08:53:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:53:48,717 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-09 08:53:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 08:53:48,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-09 08:53:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:53:48,718 INFO L225 Difference]: With dead ends: 41 [2020-12-09 08:53:48,718 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 08:53:48,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:53:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 08:53:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-12-09 08:53:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 08:53:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-09 08:53:48,722 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2020-12-09 08:53:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:53:48,722 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-09 08:53:48,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 08:53:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-09 08:53:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 08:53:48,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:48,723 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 08:53:48,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 08:53:48,925 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1049593954, now seen corresponding path program 1 times [2020-12-09 08:53:48,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:53:48,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192418479] [2020-12-09 08:53:48,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 08:53:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:53:49,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 08:53:49,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:53:49,028 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 08:53:49,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:53:49,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192418479] [2020-12-09 08:53:49,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:53:49,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:53:49,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130473763] [2020-12-09 08:53:49,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:53:49,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:53:49,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:53:49,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:53:49,029 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2020-12-09 08:53:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:53:49,058 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-12-09 08:53:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:53:49,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 08:53:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:53:49,059 INFO L225 Difference]: With dead ends: 51 [2020-12-09 08:53:49,059 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 08:53:49,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 08:53:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 08:53:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2020-12-09 08:53:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 08:53:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-09 08:53:49,062 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 18 [2020-12-09 08:53:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:53:49,063 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-09 08:53:49,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:53:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-09 08:53:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 08:53:49,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:53:49,063 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 08:53:49,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 08:53:49,265 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:53:49,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:53:49,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-12-09 08:53:49,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:53:49,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152372690] [2020-12-09 08:53:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 08:53:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:53:49,447 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:53:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:53:49,519 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:53:49,562 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 08:53:49,562 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:53:49,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 08:53:49,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:53:49 BoogieIcfgContainer [2020-12-09 08:53:49,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:53:49,819 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:53:49,819 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:53:49,819 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:53:49,819 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:53:45" (3/4) ... [2020-12-09 08:53:49,821 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 08:53:49,853 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ada41947-e600-440f-96e2-3627a079bd08/bin/utaipan/witness.graphml [2020-12-09 08:53:49,853 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:53:49,855 INFO L168 Benchmark]: Toolchain (without parser) took 4649.84 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 35.7 MB in the beginning and 26.7 MB in the end (delta: 8.9 MB). Peak memory consumption was 29.3 MB. Max. memory is 16.1 GB. [2020-12-09 08:53:49,855 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 56.6 MB. Free memory was 39.1 MB in the beginning and 39.0 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:53:49,856 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.31 ms. Allocated memory is still 56.6 MB. Free memory was 35.5 MB in the beginning and 39.4 MB in the end (delta: -3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 08:53:49,856 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.04 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 37.5 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:53:49,856 INFO L168 Benchmark]: Boogie Preprocessor took 32.25 ms. Allocated memory is still 56.6 MB. Free memory was 37.5 MB in the beginning and 35.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:53:49,857 INFO L168 Benchmark]: RCFGBuilder took 316.40 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 35.9 MB in the beginning and 49.8 MB in the end (delta: -13.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:53:49,857 INFO L168 Benchmark]: TraceAbstraction took 4030.93 ms. Allocated memory is still 77.6 MB. Free memory was 49.2 MB in the beginning and 29.5 MB in the end (delta: 19.7 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2020-12-09 08:53:49,858 INFO L168 Benchmark]: Witness Printer took 34.12 ms. Allocated memory is still 77.6 MB. Free memory was 29.5 MB in the beginning and 26.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:53:49,861 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 56.6 MB. Free memory was 39.1 MB in the beginning and 39.0 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.31 ms. Allocated memory is still 56.6 MB. Free memory was 35.5 MB in the beginning and 39.4 MB in the end (delta: -3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.04 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 37.5 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.25 ms. Allocated memory is still 56.6 MB. Free memory was 37.5 MB in the beginning and 35.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 316.40 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 35.9 MB in the beginning and 49.8 MB in the end (delta: -13.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4030.93 ms. Allocated memory is still 77.6 MB. Free memory was 49.2 MB in the beginning and 29.5 MB in the end (delta: 19.7 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. * Witness Printer took 34.12 ms. Allocated memory is still 77.6 MB. Free memory was 29.5 MB in the beginning and 26.7 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: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L54] COND FALSE !(__fpclassify_double(x) == 0) [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L56] COND FALSE !(__fpclassify_double(y) == 0) [L59] EXPR x > y ? x : y [L59] return x > y ? x : y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L63] __uint32_t msw; [L66] ieee_double_shape_type gh_u; [L67] gh_u.value = (x) [L68] EXPR gh_u.parts.msw [L68] (msw) = gh_u.parts.msw [L71] return (msw & 0x80000000) != 0; [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.9s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 326 SDtfs, 209 SDslu, 383 SDs, 0 SdLazy, 132 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 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, 9 MinimizatonAttempts, 72 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 124 ConstructedInterpolants, 6 QuantifiedInterpolants, 5474 SizeOfPredicates, 29 NumberOfNonLiveVariables, 537 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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...