./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cbmc-regression/float2.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_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cbmc-regression/float2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/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 069e404bf7b01a351383c4004538ba52022db96a .............................................................................................................................................................................................................................................. 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_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cbmc-regression/float2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/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 069e404bf7b01a351383c4004538ba52022db96a ............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:22:28,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:22:28,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:22:29,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:22:29,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:22:29,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:22:29,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:22:29,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:22:29,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:22:29,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:22:29,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:22:29,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:22:29,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:22:29,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:22:29,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:22:29,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:22:29,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:22:29,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:22:29,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:22:29,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:22:29,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:22:29,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:22:29,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:22:29,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:22:29,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:22:29,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:22:29,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:22:29,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:22:29,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:22:29,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:22:29,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:22:29,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:22:29,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:22:29,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:22:29,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:22:29,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:22:29,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:22:29,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:22:29,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:22:29,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:22:29,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:22:29,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:22:29,200 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:22:29,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:22:29,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:22:29,202 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:22:29,202 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:22:29,203 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:22:29,203 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:22:29,203 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:22:29,204 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:22:29,204 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:22:29,205 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:22:29,206 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:22:29,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:22:29,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:22:29,206 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:22:29,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:22:29,208 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:22:29,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:22:29,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:22:29,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:22:29,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:22:29,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:22:29,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:22:29,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:22:29,210 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:22:29,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:22:29,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:22:29,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:22:29,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:22:29,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:22:29,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:22:29,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:22:29,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:22:29,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:22:29,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:22:29,215 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:22:29,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:22:29,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:22:29,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:22:29,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:22:29,217 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_b633f84f-7dea-4ea2-9d76-929e5e022d9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 069e404bf7b01a351383c4004538ba52022db96a [2020-11-28 07:22:29,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:22:29,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:22:29,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:22:29,644 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:22:29,645 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:22:29,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/../../sv-benchmarks/c/floats-cbmc-regression/float2.c [2020-11-28 07:22:29,733 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/data/c138368a1/2582307d54b4429a9fbe6415b4c6b2d6/FLAGc623ff040 [2020-11-28 07:22:30,392 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:22:30,393 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/sv-benchmarks/c/floats-cbmc-regression/float2.c [2020-11-28 07:22:30,407 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/data/c138368a1/2582307d54b4429a9fbe6415b4c6b2d6/FLAGc623ff040 [2020-11-28 07:22:30,743 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/data/c138368a1/2582307d54b4429a9fbe6415b4c6b2d6 [2020-11-28 07:22:30,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:22:30,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:22:30,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:22:30,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:22:30,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:22:30,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:22:30" (1/1) ... [2020-11-28 07:22:30,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467a570a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:30, skipping insertion in model container [2020-11-28 07:22:30,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:22:30" (1/1) ... [2020-11-28 07:22:30,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:22:30,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:22:30,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:22:30,988 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:22:31,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:22:31,047 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:22:31,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31 WrapperNode [2020-11-28 07:22:31,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:22:31,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:22:31,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:22:31,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:22:31,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (1/1) ... [2020-11-28 07:22:31,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (1/1) ... [2020-11-28 07:22:31,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:22:31,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:22:31,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:22:31,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:22:31,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (1/1) ... [2020-11-28 07:22:31,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (1/1) ... [2020-11-28 07:22:31,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (1/1) ... [2020-11-28 07:22:31,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (1/1) ... [2020-11-28 07:22:31,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (1/1) ... [2020-11-28 07:22:31,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (1/1) ... [2020-11-28 07:22:31,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (1/1) ... [2020-11-28 07:22:31,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:22:31,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:22:31,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:22:31,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:22:31,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/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 [2020-11-28 07:22:31,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:22:31,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:22:31,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:22:31,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:22:31,772 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:22:31,772 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 07:22:31,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:22:31 BoogieIcfgContainer [2020-11-28 07:22:31,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:22:31,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:22:31,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:22:31,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:22:31,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:22:30" (1/3) ... [2020-11-28 07:22:31,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e909db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:22:31, skipping insertion in model container [2020-11-28 07:22:31,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:31" (2/3) ... [2020-11-28 07:22:31,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e909db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:22:31, skipping insertion in model container [2020-11-28 07:22:31,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:22:31" (3/3) ... [2020-11-28 07:22:31,786 INFO L111 eAbstractionObserver]: Analyzing ICFG float2.c [2020-11-28 07:22:31,799 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:22:31,804 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-28 07:22:31,817 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-28 07:22:31,861 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:22:31,862 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:22:31,863 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:22:31,863 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:22:31,864 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:22:31,864 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:22:31,864 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:22:31,864 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:22:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-28 07:22:31,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:22:31,889 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:22:31,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:22:31,890 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:22:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:22:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash 76080, now seen corresponding path program 1 times [2020-11-28 07:22:31,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:22:31,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316944709] [2020-11-28 07:22:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:22:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:22:32,053 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:22:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:22:32,089 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:22:32,121 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:22:32,122 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:22:32,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:22:32,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:22:32 BoogieIcfgContainer [2020-11-28 07:22:32,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:22:32,154 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:22:32,155 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:22:32,155 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:22:32,156 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:22:31" (3/4) ... [2020-11-28 07:22:32,160 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:22:32,160 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:22:32,166 INFO L168 Benchmark]: Toolchain (without parser) took 1413.09 ms. Allocated memory is still 102.8 MB. Free memory was 74.5 MB in the beginning and 52.8 MB in the end (delta: 21.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:32,167 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory is still 61.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:22:32,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.40 ms. Allocated memory is still 102.8 MB. Free memory was 74.1 MB in the beginning and 80.5 MB in the end (delta: -6.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:32,172 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.47 ms. Allocated memory is still 102.8 MB. Free memory was 80.5 MB in the beginning and 79.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:22:32,174 INFO L168 Benchmark]: Boogie Preprocessor took 23.85 ms. Allocated memory is still 102.8 MB. Free memory was 79.3 MB in the beginning and 78.4 MB in the end (delta: 876.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:32,176 INFO L168 Benchmark]: RCFGBuilder took 660.01 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 65.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:32,177 INFO L168 Benchmark]: TraceAbstraction took 375.77 ms. Allocated memory is still 102.8 MB. Free memory was 64.6 MB in the beginning and 53.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:32,178 INFO L168 Benchmark]: Witness Printer took 6.24 ms. Allocated memory is still 102.8 MB. Free memory was 53.2 MB in the beginning and 52.8 MB in the end (delta: 402.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:22:32,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory is still 61.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 283.40 ms. Allocated memory is still 102.8 MB. Free memory was 74.1 MB in the beginning and 80.5 MB in the end (delta: -6.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.47 ms. Allocated memory is still 102.8 MB. Free memory was 80.5 MB in the beginning and 79.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.85 ms. Allocated memory is still 102.8 MB. Free memory was 79.3 MB in the beginning and 78.4 MB in the end (delta: 876.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 660.01 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 65.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 375.77 ms. Allocated memory is still 102.8 MB. Free memory was 64.6 MB in the beginning and 53.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 6.24 ms. Allocated memory is still 102.8 MB. Free memory was 53.2 MB in the beginning and 52.8 MB in the end (delta: 402.5 kB). 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 someBinaryDOUBLEComparisonOperation at line 12. Possible FailurePath: [L7] float a; [L8] double b; [L11] a=1.25L [L12] COND TRUE !(a==1.25) [L3] __assert_fail("0", "float2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 4 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=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: 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 [2020-11-28 07:22:35,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:22:35,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:22:35,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:22:35,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:22:35,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:22:35,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:22:35,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:22:35,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:22:35,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:22:35,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:22:35,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:22:35,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:22:35,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:22:35,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:22:35,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:22:35,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:22:35,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:22:35,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:22:35,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:22:35,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:22:35,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:22:35,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:22:35,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:22:35,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:22:35,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:22:35,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:22:35,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:22:35,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:22:35,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:22:35,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:22:35,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:22:35,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:22:35,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:22:35,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:22:35,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:22:35,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:22:35,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:22:35,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:22:35,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:22:35,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:22:35,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-28 07:22:35,463 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:22:35,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:22:35,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:22:35,467 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:22:35,468 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:22:35,468 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:22:35,468 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:22:35,469 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:22:35,469 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:22:35,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:22:35,473 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:22:35,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:22:35,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:22:35,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:22:35,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:22:35,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:22:35,475 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:22:35,475 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 07:22:35,475 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 07:22:35,475 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:22:35,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:22:35,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:22:35,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:22:35,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:22:35,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 07:22:35,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:22:35,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:22:35,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:22:35,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:22:35,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:22:35,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:22:35,498 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-28 07:22:35,498 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 07:22:35,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:22:35,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:22:35,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:22:35,500 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_b633f84f-7dea-4ea2-9d76-929e5e022d9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 069e404bf7b01a351383c4004538ba52022db96a [2020-11-28 07:22:36,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:22:36,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:22:36,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:22:36,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:22:36,078 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:22:36,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/../../sv-benchmarks/c/floats-cbmc-regression/float2.c [2020-11-28 07:22:36,184 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/data/2300d9096/e4d8ea55640f4f1da279427c7680d74d/FLAGeb2ecdec6 [2020-11-28 07:22:36,846 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:22:36,847 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/sv-benchmarks/c/floats-cbmc-regression/float2.c [2020-11-28 07:22:36,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/data/2300d9096/e4d8ea55640f4f1da279427c7680d74d/FLAGeb2ecdec6 [2020-11-28 07:22:37,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/data/2300d9096/e4d8ea55640f4f1da279427c7680d74d [2020-11-28 07:22:37,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:22:37,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:22:37,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:22:37,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:22:37,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:22:37,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@220874e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37, skipping insertion in model container [2020-11-28 07:22:37,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:22:37,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:22:37,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:22:37,435 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:22:37,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:22:37,473 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:22:37,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37 WrapperNode [2020-11-28 07:22:37,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:22:37,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:22:37,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:22:37,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:22:37,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:22:37,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:22:37,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:22:37,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:22:37,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (1/1) ... [2020-11-28 07:22:37,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:22:37,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:22:37,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:22:37,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:22:37,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/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 [2020-11-28 07:22:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:22:37,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:22:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 07:22:37,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:22:38,451 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:22:38,453 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 07:22:38,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:22:38 BoogieIcfgContainer [2020-11-28 07:22:38,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:22:38,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:22:38,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:22:38,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:22:38,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:22:37" (1/3) ... [2020-11-28 07:22:38,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb91352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:22:38, skipping insertion in model container [2020-11-28 07:22:38,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:22:37" (2/3) ... [2020-11-28 07:22:38,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb91352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:22:38, skipping insertion in model container [2020-11-28 07:22:38,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:22:38" (3/3) ... [2020-11-28 07:22:38,467 INFO L111 eAbstractionObserver]: Analyzing ICFG float2.c [2020-11-28 07:22:38,480 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:22:38,485 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-28 07:22:38,500 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-28 07:22:38,544 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:22:38,544 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:22:38,545 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:22:38,545 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:22:38,545 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:22:38,545 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:22:38,546 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:22:38,546 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:22:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-28 07:22:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:22:38,569 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:22:38,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:22:38,571 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:22:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:22:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2020-11-28 07:22:38,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:22:38,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90534719] [2020-11-28 07:22:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/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 [2020-11-28 07:22:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:22:38,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:22:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:22:38,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:22:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:22:38,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90534719] [2020-11-28 07:22:38,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:22:38,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:22:38,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078061340] [2020-11-28 07:22:38,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:22:38,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:22:39,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:22:39,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:22:39,014 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-11-28 07:22:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:22:39,141 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-11-28 07:22:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:22:39,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:22:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:22:39,153 INFO L225 Difference]: With dead ends: 39 [2020-11-28 07:22:39,153 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 07:22:39,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:22:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 07:22:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 07:22:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:22:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-11-28 07:22:39,193 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 4 [2020-11-28 07:22:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:22:39,193 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-11-28 07:22:39,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:22:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-11-28 07:22:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:22:39,194 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:22:39,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:22:39,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 07:22:39,421 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:22:39,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:22:39,423 INFO L82 PathProgramCache]: Analyzing trace with hash 889691430, now seen corresponding path program 1 times [2020-11-28 07:22:39,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:22:39,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446662824] [2020-11-28 07:22:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/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 [2020-11-28 07:22:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:39,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:22:39,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:22:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:22:39,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:22:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:22:39,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446662824] [2020-11-28 07:22:39,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:22:39,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:22:39,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753334662] [2020-11-28 07:22:39,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:22:39,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:22:39,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:22:39,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:22:39,530 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 3 states. [2020-11-28 07:22:39,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:22:39,666 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-11-28 07:22:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:22:39,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-28 07:22:39,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:22:39,669 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:22:39,669 INFO L226 Difference]: Without dead ends: 13 [2020-11-28 07:22:39,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:22:39,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-28 07:22:39,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-28 07:22:39,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 07:22:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2020-11-28 07:22:39,673 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 6 [2020-11-28 07:22:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:22:39,674 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2020-11-28 07:22:39,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:22:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2020-11-28 07:22:39,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:22:39,674 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:22:39,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:22:39,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 07:22:39,875 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:22:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:22:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash 295158664, now seen corresponding path program 1 times [2020-11-28 07:22:39,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:22:39,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232767143] [2020-11-28 07:22:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/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 [2020-11-28 07:22:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:39,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:22:39,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:22:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:22:39,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:22:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:22:39,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232767143] [2020-11-28 07:22:39,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:22:39,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:22:39,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341257239] [2020-11-28 07:22:39,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:22:39,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:22:39,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:22:39,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:22:39,989 INFO L87 Difference]: Start difference. First operand 13 states and 12 transitions. Second operand 3 states. [2020-11-28 07:22:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:22:40,211 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2020-11-28 07:22:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:22:40,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-28 07:22:40,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:22:40,213 INFO L225 Difference]: With dead ends: 13 [2020-11-28 07:22:40,213 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:22:40,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:22:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:22:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:22:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:22:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2020-11-28 07:22:40,216 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 8 [2020-11-28 07:22:40,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:22:40,217 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2020-11-28 07:22:40,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:22:40,217 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2020-11-28 07:22:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:22:40,218 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:22:40,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:22:40,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-28 07:22:40,419 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:22:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:22:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash 179821258, now seen corresponding path program 1 times [2020-11-28 07:22:40,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:22:40,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617130450] [2020-11-28 07:22:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/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 [2020-11-28 07:22:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:40,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:22:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:22:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:22:40,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:22:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:22:40,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617130450] [2020-11-28 07:22:40,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:22:40,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:22:40,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089587063] [2020-11-28 07:22:40,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:22:40,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:22:40,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:22:40,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:22:40,567 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand 3 states. [2020-11-28 07:22:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:22:40,733 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2020-11-28 07:22:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:22:40,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-28 07:22:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:22:40,735 INFO L225 Difference]: With dead ends: 11 [2020-11-28 07:22:40,735 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:22:40,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:22:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:22:40,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:22:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:22:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:22:40,737 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-11-28 07:22:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:22:40,737 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:22:40,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:22:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:22:40,738 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:22:40,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-28 07:22:40,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:22:40,944 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:22:40,944 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,944 INFO L274 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-11-28 07:22:40,944 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,944 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-28 07:22:40,944 INFO L274 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2020-11-28 07:22:40,945 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-28 07:22:40,945 INFO L274 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-11-28 07:22:40,945 INFO L274 CegarLoopResult]: For program point L5(lines 5 24) no Hoare annotation was computed. [2020-11-28 07:22:40,945 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,945 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,945 INFO L274 CegarLoopResult]: For program point L3-2(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,945 INFO L274 CegarLoopResult]: For program point L3-3(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,945 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 07:22:40,946 INFO L274 CegarLoopResult]: For program point L3-4(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,946 INFO L274 CegarLoopResult]: For program point L3-5(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,946 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:22:40,946 INFO L274 CegarLoopResult]: For program point L3-6(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,946 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 07:22:40,946 INFO L274 CegarLoopResult]: For program point L3-7(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,947 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,947 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:22:40,947 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-28 07:22:40,947 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-28 07:22:40,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:22:40 BoogieIcfgContainer [2020-11-28 07:22:40,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:22:40,953 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:22:40,953 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:22:40,953 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:22:40,954 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:22:38" (3/4) ... [2020-11-28 07:22:40,958 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:22:40,970 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-28 07:22:40,970 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 07:22:40,970 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:22:40,971 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:22:41,011 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b633f84f-7dea-4ea2-9d76-929e5e022d9c/bin/utaipan/witness.graphml [2020-11-28 07:22:41,011 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:22:41,014 INFO L168 Benchmark]: Toolchain (without parser) took 3793.10 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 59.0 MB in the beginning and 61.9 MB in the end (delta: -3.0 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:41,014 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 73.4 MB. Free memory is still 56.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:22:41,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.96 ms. Allocated memory is still 73.4 MB. Free memory was 58.8 MB in the beginning and 49.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:41,016 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.29 ms. Allocated memory is still 73.4 MB. Free memory was 49.2 MB in the beginning and 47.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:41,017 INFO L168 Benchmark]: Boogie Preprocessor took 98.32 ms. Allocated memory is still 73.4 MB. Free memory was 47.8 MB in the beginning and 58.0 MB in the end (delta: -10.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:41,017 INFO L168 Benchmark]: RCFGBuilder took 840.60 ms. Allocated memory is still 73.4 MB. Free memory was 57.8 MB in the beginning and 45.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:41,018 INFO L168 Benchmark]: TraceAbstraction took 2493.63 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 45.5 MB in the beginning and 64.6 MB in the end (delta: -19.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:22:41,019 INFO L168 Benchmark]: Witness Printer took 58.57 ms. Allocated memory is still 88.1 MB. Free memory was 64.0 MB in the beginning and 61.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:41,022 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 73.4 MB. Free memory is still 56.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 252.96 ms. Allocated memory is still 73.4 MB. Free memory was 58.8 MB in the beginning and 49.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.29 ms. Allocated memory is still 73.4 MB. Free memory was 49.2 MB in the beginning and 47.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 98.32 ms. Allocated memory is still 73.4 MB. Free memory was 47.8 MB in the beginning and 58.0 MB in the end (delta: -10.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 840.60 ms. Allocated memory is still 73.4 MB. Free memory was 57.8 MB in the beginning and 45.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2493.63 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 45.5 MB in the beginning and 64.6 MB in the end (delta: -19.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 58.57 ms. Allocated memory is still 88.1 MB. Free memory was 64.0 MB in the beginning and 61.9 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 - 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 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 14 SDslu, 5 SDs, 0 SdLazy, 37 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 4 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, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 596 SizeOfPredicates, 8 NumberOfNonLiveVariables, 112 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...