./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cbmc-regression/float-no-simp6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cbmc-regression/float-no-simp6.c -s /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/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 6a5ffd33a79ac0f158a6e6ff96de12eae93b56cb .............................................................................................................................................................................................................................................. 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_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cbmc-regression/float-no-simp6.c -s /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/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 6a5ffd33a79ac0f158a6e6ff96de12eae93b56cb ......................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:52:58,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:52:58,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:52:58,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:52:58,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:52:58,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:52:58,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:52:58,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:52:58,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:52:58,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:52:58,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:52:58,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:52:58,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:52:58,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:52:58,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:52:58,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:52:58,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:52:58,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:52:58,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:52:58,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:52:58,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:52:58,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:52:58,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:52:58,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:52:58,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:52:58,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:52:58,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:52:58,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:52:58,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:52:58,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:52:58,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:52:58,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:52:58,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:52:58,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:52:58,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:52:58,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:52:58,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:52:58,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:52:58,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:52:58,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:52:58,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:52:58,984 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:52:59,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:52:59,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:52:59,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:52:59,039 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:52:59,040 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:52:59,040 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:52:59,040 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:52:59,041 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:52:59,041 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:52:59,041 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:52:59,043 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:52:59,043 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:52:59,043 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:52:59,043 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:52:59,044 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:52:59,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:52:59,046 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:52:59,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:52:59,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:52:59,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:52:59,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:52:59,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:52:59,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:52:59,048 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:52:59,048 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:52:59,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:52:59,048 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:52:59,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:52:59,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:52:59,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:52:59,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:52:59,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:52:59,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:52:59,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:52:59,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:52:59,051 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:52:59,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:52:59,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:52:59,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:52:59,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:52:59,053 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_832e3848-e412-4e1e-b378-9110f0454e8d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a5ffd33a79ac0f158a6e6ff96de12eae93b56cb [2020-11-22 12:52:59,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:52:59,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:52:59,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:52:59,398 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:52:59,399 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:52:59,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/../../sv-benchmarks/c/floats-cbmc-regression/float-no-simp6.c [2020-11-22 12:52:59,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/data/a4ce25113/b813ca04d3a34bd2848458c09841dff6/FLAGde9e110eb [2020-11-22 12:53:00,047 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:53:00,048 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/sv-benchmarks/c/floats-cbmc-regression/float-no-simp6.c [2020-11-22 12:53:00,060 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/data/a4ce25113/b813ca04d3a34bd2848458c09841dff6/FLAGde9e110eb [2020-11-22 12:53:00,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/data/a4ce25113/b813ca04d3a34bd2848458c09841dff6 [2020-11-22 12:53:00,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:53:00,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:53:00,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:53:00,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:53:00,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:53:00,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555b8fef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00, skipping insertion in model container [2020-11-22 12:53:00,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:53:00,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:53:00,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:53:00,696 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:53:00,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:53:00,746 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:53:00,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00 WrapperNode [2020-11-22 12:53:00,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:53:00,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:53:00,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:53:00,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:53:00,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:53:00,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:53:00,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:53:00,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:53:00,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (1/1) ... [2020-11-22 12:53:00,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:53:00,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:53:00,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:53:00,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:53:00,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/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 [2020-11-22 12:53:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:53:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:53:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:53:00,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:53:01,266 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:53:01,266 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-11-22 12:53:01,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:01 BoogieIcfgContainer [2020-11-22 12:53:01,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:53:01,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:53:01,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:53:01,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:53:01,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:53:00" (1/3) ... [2020-11-22 12:53:01,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a30d7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:53:01, skipping insertion in model container [2020-11-22 12:53:01,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:00" (2/3) ... [2020-11-22 12:53:01,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a30d7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:53:01, skipping insertion in model container [2020-11-22 12:53:01,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:01" (3/3) ... [2020-11-22 12:53:01,302 INFO L111 eAbstractionObserver]: Analyzing ICFG float-no-simp6.c [2020-11-22 12:53:01,314 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:53:01,318 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-22 12:53:01,346 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-22 12:53:01,376 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:53:01,376 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:53:01,376 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:53:01,376 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:53:01,377 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:53:01,377 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:53:01,377 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:53:01,377 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:53:01,392 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-11-22 12:53:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 12:53:01,399 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:01,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 12:53:01,400 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:53:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:01,408 INFO L82 PathProgramCache]: Analyzing trace with hash 66470, now seen corresponding path program 1 times [2020-11-22 12:53:01,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:01,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219638230] [2020-11-22 12:53:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:53:01,566 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:53:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:53:01,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:53:01,663 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:53:01,664 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:53:01,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:53:01,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:53:01 BoogieIcfgContainer [2020-11-22 12:53:01,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:53:01,691 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:53:01,691 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:53:01,691 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:53:01,692 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:01" (3/4) ... [2020-11-22 12:53:01,696 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-22 12:53:01,696 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:53:01,707 INFO L168 Benchmark]: Toolchain (without parser) took 1269.12 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 64.0 MB in the beginning and 101.0 MB in the end (delta: -37.1 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:01,708 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 61.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:01,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.28 ms. Allocated memory is still 90.2 MB. Free memory was 63.7 MB in the beginning and 52.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:01,710 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.90 ms. Allocated memory is still 90.2 MB. Free memory was 52.5 MB in the beginning and 51.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:01,712 INFO L168 Benchmark]: Boogie Preprocessor took 24.84 ms. Allocated memory is still 90.2 MB. Free memory was 51.0 MB in the beginning and 50.1 MB in the end (delta: 886.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:01,713 INFO L168 Benchmark]: RCFGBuilder took 452.82 ms. Allocated memory is still 90.2 MB. Free memory was 50.1 MB in the beginning and 37.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:01,718 INFO L168 Benchmark]: TraceAbstraction took 408.53 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 36.8 MB in the beginning and 101.0 MB in the end (delta: -64.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:01,719 INFO L168 Benchmark]: Witness Printer took 6.00 ms. Allocated memory is still 132.1 MB. Free memory is still 101.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:01,733 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 61.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.28 ms. Allocated memory is still 90.2 MB. Free memory was 63.7 MB in the beginning and 52.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.90 ms. Allocated memory is still 90.2 MB. Free memory was 52.5 MB in the beginning and 51.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.84 ms. Allocated memory is still 90.2 MB. Free memory was 51.0 MB in the beginning and 50.1 MB in the end (delta: 886.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 452.82 ms. Allocated memory is still 90.2 MB. Free memory was 50.1 MB in the beginning and 37.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 408.53 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 36.8 MB in the beginning and 101.0 MB in the end (delta: -64.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 6.00 ms. Allocated memory is still 132.1 MB. Free memory is still 101.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 25, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L20] float f1=0x1.000000p-1f; [L21] float f2=0x1.fffffep-126f; [L23] float res = f1 * f2; [L25] COND TRUE !(res == 0x1.0p-126f) [L3] __assert_fail("0", "float-no-simp6.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:53:04,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:53:04,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:53:04,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:53:04,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:53:04,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:53:04,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:53:04,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:53:04,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:53:04,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:53:04,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:53:04,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:53:04,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:53:04,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:53:04,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:53:04,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:53:04,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:53:04,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:53:04,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:53:04,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:53:04,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:53:04,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:53:04,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:53:04,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:53:04,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:53:04,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:53:04,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:53:04,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:53:04,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:53:04,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:53:04,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:53:04,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:53:04,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:53:04,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:53:04,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:53:04,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:53:04,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:53:04,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:53:04,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:53:04,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:53:04,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:53:04,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-22 12:53:04,935 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:53:04,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:53:04,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:53:04,937 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:53:04,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:53:04,938 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:53:04,939 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:53:04,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:53:04,939 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:53:04,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:53:04,941 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:53:04,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:53:04,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:53:04,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:53:04,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:53:04,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:53:04,943 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:53:04,943 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-22 12:53:04,944 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-22 12:53:04,944 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:53:04,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:53:04,945 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:53:04,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:53:04,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:53:04,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-22 12:53:04,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:53:04,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:53:04,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:53:04,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:53:04,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:53:04,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:53:04,949 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-22 12:53:04,949 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-22 12:53:04,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:53:04,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:53:04,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:53:04,950 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_832e3848-e412-4e1e-b378-9110f0454e8d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a5ffd33a79ac0f158a6e6ff96de12eae93b56cb [2020-11-22 12:53:05,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:53:05,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:53:05,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:53:05,429 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:53:05,432 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:53:05,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/../../sv-benchmarks/c/floats-cbmc-regression/float-no-simp6.c [2020-11-22 12:53:05,535 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/data/0cb6d16a4/2963188e43544bc59015b34e0e118732/FLAG8fe0204d9 [2020-11-22 12:53:06,187 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:53:06,188 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/sv-benchmarks/c/floats-cbmc-regression/float-no-simp6.c [2020-11-22 12:53:06,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/data/0cb6d16a4/2963188e43544bc59015b34e0e118732/FLAG8fe0204d9 [2020-11-22 12:53:06,548 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/data/0cb6d16a4/2963188e43544bc59015b34e0e118732 [2020-11-22 12:53:06,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:53:06,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:53:06,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:53:06,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:53:06,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:53:06,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:06,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab5075f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06, skipping insertion in model container [2020-11-22 12:53:06,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:06,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:53:06,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:53:06,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:53:06,913 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:53:06,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:53:06,981 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:53:06,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06 WrapperNode [2020-11-22 12:53:06,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:53:06,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:53:06,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:53:06,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:53:06,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:07,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:07,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:53:07,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:53:07,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:53:07,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:53:07,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:07,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:07,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:07,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:07,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:07,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:07,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (1/1) ... [2020-11-22 12:53:07,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:53:07,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:53:07,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:53:07,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:53:07,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/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 [2020-11-22 12:53:07,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-22 12:53:07,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:53:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:53:07,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:53:08,970 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:53:08,985 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-11-22 12:53:08,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:08 BoogieIcfgContainer [2020-11-22 12:53:08,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:53:08,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:53:08,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:53:08,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:53:08,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:53:06" (1/3) ... [2020-11-22 12:53:08,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b98d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:53:08, skipping insertion in model container [2020-11-22 12:53:09,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:06" (2/3) ... [2020-11-22 12:53:09,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b98d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:53:09, skipping insertion in model container [2020-11-22 12:53:09,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:08" (3/3) ... [2020-11-22 12:53:09,013 INFO L111 eAbstractionObserver]: Analyzing ICFG float-no-simp6.c [2020-11-22 12:53:09,035 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:53:09,040 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-22 12:53:09,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-22 12:53:09,098 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:53:09,098 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:53:09,098 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:53:09,099 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:53:09,099 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:53:09,099 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:53:09,099 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:53:09,099 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:53:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-22 12:53:09,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:53:09,118 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:09,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:53:09,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:53:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:09,127 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2020-11-22 12:53:09,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 12:53:09,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252789242] [2020-11-22 12:53:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/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 [2020-11-22 12:53:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:09,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:53:09,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:09,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:09,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252789242] [2020-11-22 12:53:09,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:53:09,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-22 12:53:09,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155267654] [2020-11-22 12:53:09,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:53:09,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 12:53:09,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:53:09,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:53:09,579 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 6 states. [2020-11-22 12:53:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:10,513 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-11-22 12:53:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:53:10,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2020-11-22 12:53:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:10,527 INFO L225 Difference]: With dead ends: 30 [2020-11-22 12:53:10,529 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 12:53:10,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:53:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 12:53:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-22 12:53:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-22 12:53:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2020-11-22 12:53:10,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 4 [2020-11-22 12:53:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:10,565 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2020-11-22 12:53:10,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:53:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2020-11-22 12:53:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:53:10,567 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:10,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 12:53:10,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-22 12:53:10,777 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:53:10,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:10,778 INFO L82 PathProgramCache]: Analyzing trace with hash 889691430, now seen corresponding path program 1 times [2020-11-22 12:53:10,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 12:53:10,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556452915] [2020-11-22 12:53:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/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 [2020-11-22 12:53:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:11,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:53:11,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:11,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:11,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556452915] [2020-11-22 12:53:11,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:53:11,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-22 12:53:11,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936577554] [2020-11-22 12:53:11,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:53:11,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 12:53:11,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:53:11,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:53:11,332 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand 6 states. [2020-11-22 12:53:11,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:11,868 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2020-11-22 12:53:11,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:53:11,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-22 12:53:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:11,870 INFO L225 Difference]: With dead ends: 11 [2020-11-22 12:53:11,870 INFO L226 Difference]: Without dead ends: 9 [2020-11-22 12:53:11,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:53:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-22 12:53:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-22 12:53:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-22 12:53:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8 transitions. [2020-11-22 12:53:11,874 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 8 transitions. Word has length 6 [2020-11-22 12:53:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:11,875 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 8 transitions. [2020-11-22 12:53:11,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:53:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 8 transitions. [2020-11-22 12:53:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:53:11,876 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:11,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:53:12,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-22 12:53:12,090 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:53:12,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:12,091 INFO L82 PathProgramCache]: Analyzing trace with hash 295158664, now seen corresponding path program 1 times [2020-11-22 12:53:12,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 12:53:12,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920795833] [2020-11-22 12:53:12,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/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 [2020-11-22 12:53:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:12,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-22 12:53:12,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:12,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:12,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920795833] [2020-11-22 12:53:12,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:53:12,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-22 12:53:12,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460313130] [2020-11-22 12:53:12,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:53:12,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 12:53:12,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:53:12,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:53:12,596 INFO L87 Difference]: Start difference. First operand 9 states and 8 transitions. Second operand 6 states. [2020-11-22 12:53:13,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:13,675 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2020-11-22 12:53:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:53:13,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-11-22 12:53:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:13,684 INFO L225 Difference]: With dead ends: 9 [2020-11-22 12:53:13,684 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:53:13,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:53:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:53:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:53:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:53:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:53:13,685 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2020-11-22 12:53:13,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:13,686 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:53:13,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:53:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:53:13,686 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:53:13,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-22 12:53:13,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:53:13,895 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:53:13,895 INFO L274 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-11-22 12:53:13,895 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-22 12:53:13,896 INFO L274 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-11-22 12:53:13,896 INFO L274 CegarLoopResult]: For program point L38(lines 1 52) no Hoare annotation was computed. [2020-11-22 12:53:13,896 INFO L274 CegarLoopResult]: For program point L5(lines 5 26) no Hoare annotation was computed. [2020-11-22 12:53:13,896 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-22 12:53:13,897 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-11-22 12:53:13,897 INFO L274 CegarLoopResult]: For program point L3-2(line 3) no Hoare annotation was computed. [2020-11-22 12:53:13,897 INFO L274 CegarLoopResult]: For program point L3-3(line 3) no Hoare annotation was computed. [2020-11-22 12:53:13,897 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-22 12:53:13,897 INFO L274 CegarLoopResult]: For program point L3-4(line 3) no Hoare annotation was computed. [2020-11-22 12:53:13,898 INFO L274 CegarLoopResult]: For program point L3-5(line 3) no Hoare annotation was computed. [2020-11-22 12:53:13,898 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:53:13,898 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-22 12:53:13,898 INFO L274 CegarLoopResult]: For program point L28(lines 28 36) no Hoare annotation was computed. [2020-11-22 12:53:13,899 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-22 12:53:13,899 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-22 12:53:13,899 INFO L274 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-11-22 12:53:13,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:53:13 BoogieIcfgContainer [2020-11-22 12:53:13,906 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:53:13,907 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:53:13,907 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:53:13,908 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:53:13,908 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:08" (3/4) ... [2020-11-22 12:53:13,915 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:53:13,929 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-22 12:53:13,930 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:53:13,930 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:53:13,931 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:53:13,991 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_832e3848-e412-4e1e-b378-9110f0454e8d/bin/utaipan/witness.graphml [2020-11-22 12:53:13,996 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:53:13,999 INFO L168 Benchmark]: Toolchain (without parser) took 7443.83 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 35.4 MB in the beginning and 33.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:14,005 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 56.6 MB. Free memory was 38.7 MB in the beginning and 38.7 MB in the end (delta: 29.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:14,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.33 ms. Allocated memory is still 56.6 MB. Free memory was 35.1 MB in the beginning and 23.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:14,007 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.95 ms. Allocated memory is still 56.6 MB. Free memory was 23.4 MB in the beginning and 40.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:14,008 INFO L168 Benchmark]: Boogie Preprocessor took 40.38 ms. Allocated memory is still 56.6 MB. Free memory was 40.1 MB in the beginning and 39.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:14,008 INFO L168 Benchmark]: RCFGBuilder took 1860.00 ms. Allocated memory is still 56.6 MB. Free memory was 38.9 MB in the beginning and 27.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:14,009 INFO L168 Benchmark]: TraceAbstraction took 4917.30 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 26.7 MB in the beginning and 36.4 MB in the end (delta: -9.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:14,009 INFO L168 Benchmark]: Witness Printer took 89.27 ms. Allocated memory is still 73.4 MB. Free memory was 36.0 MB in the beginning and 33.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:14,018 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 56.6 MB. Free memory was 38.7 MB in the beginning and 38.7 MB in the end (delta: 29.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 428.33 ms. Allocated memory is still 56.6 MB. Free memory was 35.1 MB in the beginning and 23.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.95 ms. Allocated memory is still 56.6 MB. Free memory was 23.4 MB in the beginning and 40.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.38 ms. Allocated memory is still 56.6 MB. Free memory was 40.1 MB in the beginning and 39.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1860.00 ms. Allocated memory is still 56.6 MB. Free memory was 38.9 MB in the beginning and 27.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4917.30 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 26.7 MB in the beginning and 36.4 MB in the end (delta: -9.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. * Witness Printer took 89.27 ms. Allocated memory is still 73.4 MB. Free memory was 36.0 MB in the beginning and 33.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 50 SDslu, 0 SDs, 0 SdLazy, 33 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 0 LocationsWithAnnotation, 0 PreInvPairs, 0 NumberOfFragments, 0 HoareAnnotationTreeSize, 0 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 0 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 984 SizeOfPredicates, 11 NumberOfNonLiveVariables, 92 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 correct! Received shutdown request...