./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/freire1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/freire1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/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 b056c40c352516a88a49e796700e87b5fe62c1cb ................................................................................................................................................................................................................................................. 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_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/freire1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/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 b056c40c352516a88a49e796700e87b5fe62c1cb ...................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:10:31,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:10:31,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:10:31,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:10:31,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:10:31,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:10:31,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:10:31,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:10:31,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:10:31,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:10:31,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:10:31,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:10:31,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:10:31,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:10:31,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:10:31,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:10:31,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:10:31,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:10:31,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:10:31,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:10:31,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:10:31,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:10:31,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:10:31,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:10:31,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:10:31,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:10:31,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:10:31,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:10:31,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:10:31,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:10:31,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:10:31,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:10:31,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:10:31,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:10:31,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:10:31,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:10:31,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:10:31,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:10:31,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:10:31,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:10:31,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:10:31,546 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 09:10:31,563 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:10:31,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:10:31,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:10:31,564 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:10:31,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:10:31,564 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:10:31,564 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:10:31,564 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:10:31,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:10:31,565 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:10:31,565 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:10:31,565 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:10:31,565 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:10:31,565 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:10:31,565 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:10:31,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:10:31,566 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:10:31,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:10:31,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:10:31,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:10:31,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:10:31,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:10:31,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:10:31,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:10:31,567 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:10:31,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:10:31,567 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:10:31,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:10:31,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:10:31,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:10:31,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:10:31,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:10:31,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:10:31,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:10:31,568 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:10:31,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:10:31,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:10:31,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:10:31,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:10:31,569 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_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b056c40c352516a88a49e796700e87b5fe62c1cb [2020-12-09 09:10:31,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:10:31,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:10:31,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:10:31,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:10:31,784 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:10:31,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/../../sv-benchmarks/c/nla-digbench/freire1.c [2020-12-09 09:10:31,824 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/data/2468aeb17/953b17e5090341eb9c139af621443884/FLAG10ce82307 [2020-12-09 09:10:32,173 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:10:32,174 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/sv-benchmarks/c/nla-digbench/freire1.c [2020-12-09 09:10:32,178 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/data/2468aeb17/953b17e5090341eb9c139af621443884/FLAG10ce82307 [2020-12-09 09:10:32,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/data/2468aeb17/953b17e5090341eb9c139af621443884 [2020-12-09 09:10:32,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:10:32,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:10:32,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:10:32,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:10:32,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:10:32,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea8f55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32, skipping insertion in model container [2020-12-09 09:10:32,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:10:32,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:10:32,305 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2020-12-09 09:10:32,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:10:32,321 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:10:32,330 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2020-12-09 09:10:32,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:10:32,345 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:10:32,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32 WrapperNode [2020-12-09 09:10:32,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:10:32,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:10:32,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:10:32,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:10:32,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:10:32,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:10:32,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:10:32,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:10:32,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (1/1) ... [2020-12-09 09:10:32,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:10:32,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:10:32,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:10:32,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:10:32,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:10:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:10:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:10:32,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:10:32,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:10:32,636 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:10:32,637 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 09:10:32,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:32 BoogieIcfgContainer [2020-12-09 09:10:32,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:10:32,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:10:32,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:10:32,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:10:32,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:10:32" (1/3) ... [2020-12-09 09:10:32,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fc6153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:10:32, skipping insertion in model container [2020-12-09 09:10:32,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:32" (2/3) ... [2020-12-09 09:10:32,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fc6153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:10:32, skipping insertion in model container [2020-12-09 09:10:32,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:32" (3/3) ... [2020-12-09 09:10:32,645 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1.c [2020-12-09 09:10:32,655 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:10:32,657 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 09:10:32,664 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 09:10:32,681 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:10:32,681 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:10:32,681 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:10:32,682 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:10:32,682 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:10:32,682 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:10:32,682 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:10:32,682 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:10:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 09:10:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 09:10:32,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:32,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 09:10:32,695 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:32,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:32,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2275137, now seen corresponding path program 1 times [2020-12-09 09:10:32,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:10:32,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830036892] [2020-12-09 09:10:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:10:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:10:32,779 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:10:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:10:32,793 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:10:32,807 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 09:10:32,807 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:10:32,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:10:32,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:10:32 BoogieIcfgContainer [2020-12-09 09:10:32,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:10:32,823 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:10:32,823 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:10:32,823 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:10:32,823 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:32" (3/4) ... [2020-12-09 09:10:32,826 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 09:10:32,826 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:10:32,828 INFO L168 Benchmark]: Toolchain (without parser) took 636.80 ms. Allocated memory is still 102.8 MB. Free memory was 59.3 MB in the beginning and 53.1 MB in the end (delta: 6.1 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:10:32,828 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 102.8 MB. Free memory is still 75.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:10:32,829 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.06 ms. Allocated memory is still 102.8 MB. Free memory was 59.1 MB in the beginning and 82.2 MB in the end (delta: -23.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:10:32,830 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.91 ms. Allocated memory is still 102.8 MB. Free memory was 82.2 MB in the beginning and 80.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:10:32,830 INFO L168 Benchmark]: Boogie Preprocessor took 14.39 ms. Allocated memory is still 102.8 MB. Free memory was 80.8 MB in the beginning and 79.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:10:32,831 INFO L168 Benchmark]: RCFGBuilder took 243.09 ms. Allocated memory is still 102.8 MB. Free memory was 79.6 MB in the beginning and 66.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 09:10:32,832 INFO L168 Benchmark]: TraceAbstraction took 182.55 ms. Allocated memory is still 102.8 MB. Free memory was 65.9 MB in the beginning and 54.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 09:10:32,832 INFO L168 Benchmark]: Witness Printer took 3.67 ms. Allocated memory is still 102.8 MB. Free memory was 54.1 MB in the beginning and 53.1 MB in the end (delta: 930.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:10:32,836 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 102.8 MB. Free memory is still 75.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 155.06 ms. Allocated memory is still 102.8 MB. Free memory was 59.1 MB in the beginning and 82.2 MB in the end (delta: -23.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.91 ms. Allocated memory is still 102.8 MB. Free memory was 82.2 MB in the beginning and 80.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.39 ms. Allocated memory is still 102.8 MB. Free memory was 80.8 MB in the beginning and 79.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 243.09 ms. Allocated memory is still 102.8 MB. Free memory was 79.6 MB in the beginning and 66.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 182.55 ms. Allocated memory is still 102.8 MB. Free memory was 65.9 MB in the beginning and 54.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 3.67 ms. Allocated memory is still 102.8 MB. Free memory was 54.1 MB in the beginning and 53.1 MB in the end (delta: 930.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 32, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x; [L27] a = __VERIFIER_nondet_double() [L28] x = a / 2.0 [L29] r = 0 [L31] COND TRUE 1 [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, 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=12occurred 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, 4 NumberOfCodeBlocks, 4 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 0.2.0-7b2dab5 [2020-12-09 09:10:34,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:10:34,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:10:34,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:10:34,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:10:34,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:10:34,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:10:34,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:10:34,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:10:34,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:10:34,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:10:34,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:10:34,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:10:34,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:10:34,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:10:34,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:10:34,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:10:34,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:10:34,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:10:34,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:10:34,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:10:34,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:10:34,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:10:34,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:10:34,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:10:34,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:10:34,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:10:34,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:10:34,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:10:34,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:10:34,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:10:34,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:10:34,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:10:34,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:10:34,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:10:34,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:10:34,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:10:34,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:10:34,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:10:34,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:10:34,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:10:34,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 09:10:34,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:10:34,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:10:34,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:10:34,489 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:10:34,489 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:10:34,489 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:10:34,489 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:10:34,490 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:10:34,490 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:10:34,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:10:34,490 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:10:34,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:10:34,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:10:34,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:10:34,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:10:34,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:10:34,491 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:10:34,491 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 09:10:34,491 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 09:10:34,491 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:10:34,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:10:34,492 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:10:34,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:10:34,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:10:34,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 09:10:34,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:10:34,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:10:34,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:10:34,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:10:34,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:10:34,501 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 09:10:34,501 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 09:10:34,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:10:34,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:10:34,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:10:34,502 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_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b056c40c352516a88a49e796700e87b5fe62c1cb [2020-12-09 09:10:34,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:10:34,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:10:34,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:10:34,747 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:10:34,748 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:10:34,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/../../sv-benchmarks/c/nla-digbench/freire1.c [2020-12-09 09:10:34,788 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/data/9d62d1d30/d15fc22ca80042e18a2635cc7ebf8cd0/FLAG8e3cf3159 [2020-12-09 09:10:35,169 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:10:35,169 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/sv-benchmarks/c/nla-digbench/freire1.c [2020-12-09 09:10:35,174 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/data/9d62d1d30/d15fc22ca80042e18a2635cc7ebf8cd0/FLAG8e3cf3159 [2020-12-09 09:10:35,184 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/data/9d62d1d30/d15fc22ca80042e18a2635cc7ebf8cd0 [2020-12-09 09:10:35,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:10:35,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:10:35,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:10:35,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:10:35,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:10:35,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6941c5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35, skipping insertion in model container [2020-12-09 09:10:35,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:10:35,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:10:35,298 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2020-12-09 09:10:35,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:10:35,318 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:10:35,327 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2020-12-09 09:10:35,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:10:35,341 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:10:35,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35 WrapperNode [2020-12-09 09:10:35,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:10:35,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:10:35,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:10:35,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:10:35,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:10:35,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:10:35,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:10:35,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:10:35,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (1/1) ... [2020-12-09 09:10:35,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:10:35,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:10:35,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:10:35,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:10:35,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:10:35,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 09:10:35,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:10:35,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:10:35,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:10:43,473 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:10:43,473 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 09:10:43,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:43 BoogieIcfgContainer [2020-12-09 09:10:43,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:10:43,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:10:43,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:10:43,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:10:43,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:10:35" (1/3) ... [2020-12-09 09:10:43,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1382cc17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:10:43, skipping insertion in model container [2020-12-09 09:10:43,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:35" (2/3) ... [2020-12-09 09:10:43,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1382cc17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:10:43, skipping insertion in model container [2020-12-09 09:10:43,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:43" (3/3) ... [2020-12-09 09:10:43,480 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1.c [2020-12-09 09:10:43,490 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:10:43,493 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 09:10:43,500 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 09:10:43,516 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:10:43,516 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:10:43,516 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:10:43,516 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:10:43,516 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:10:43,516 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:10:43,516 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:10:43,516 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:10:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-09 09:10:43,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 09:10:43,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:43,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 09:10:43,531 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:43,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:43,535 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2020-12-09 09:10:43,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:10:43,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767981824] [2020-12-09 09:10:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 09:10:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:45,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 09:10:45,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:55,873 WARN L197 SmtUtils]: Spent 9.65 s on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 09:11:06,129 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 v_prenex_1) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse1 ULTIMATE.start_main_~a~0) .cse1)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)))) is different from false [2020-12-09 09:11:12,260 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 v_prenex_1) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from false [2020-12-09 09:11:14,290 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 v_prenex_1) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from true [2020-12-09 09:11:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:11:14,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:11:14,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767981824] [2020-12-09 09:11:14,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:11:14,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 09:11:14,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204727359] [2020-12-09 09:11:14,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 09:11:14,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:11:14,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 09:11:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=7, Unknown=3, NotChecked=10, Total=30 [2020-12-09 09:11:14,309 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 6 states. [2020-12-09 09:11:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:11:23,671 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2020-12-09 09:11:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:11:23,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 09:11:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:11:23,728 INFO L225 Difference]: With dead ends: 31 [2020-12-09 09:11:23,728 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 09:11:23,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=10, Invalid=7, Unknown=3, NotChecked=10, Total=30 [2020-12-09 09:11:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 09:11:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-09 09:11:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 09:11:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-09 09:11:23,754 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 5 [2020-12-09 09:11:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:11:23,754 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-09 09:11:23,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 09:11:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-09 09:11:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 09:11:23,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:11:23,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:11:23,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 09:11:23,957 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:11:23,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:11:23,960 INFO L82 PathProgramCache]: Analyzing trace with hash 300765331, now seen corresponding path program 1 times [2020-12-09 09:11:23,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:11:23,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73658986] [2020-12-09 09:11:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 09:11:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:11:24,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 09:11:24,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:11:26,396 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))))) (or (and (not .cse0) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))))) is different from false [2020-12-09 09:11:28,444 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))))) (or (and (not .cse0) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))))) is different from true [2020-12-09 09:11:30,498 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from false [2020-12-09 09:11:32,547 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from true [2020-12-09 09:11:38,716 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) is different from false [2020-12-09 09:11:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:11:38,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:11:38,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73658986] [2020-12-09 09:11:38,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:11:38,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 09:11:38,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745447360] [2020-12-09 09:11:38,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:11:38,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:11:38,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:11:38,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=2, Unknown=5, NotChecked=6, Total=20 [2020-12-09 09:11:38,728 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-12-09 09:11:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:11:38,730 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-09 09:11:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:11:38,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 09:11:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:11:38,730 INFO L225 Difference]: With dead ends: 13 [2020-12-09 09:11:38,730 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 09:11:38,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=7, Invalid=2, Unknown=5, NotChecked=6, Total=20 [2020-12-09 09:11:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 09:11:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-09 09:11:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 09:11:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-09 09:11:38,733 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 8 [2020-12-09 09:11:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:11:38,734 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-09 09:11:38,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:11:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-09 09:11:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 09:11:38,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:11:38,734 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-09 09:11:38,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 09:11:38,936 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:11:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:11:38,938 INFO L82 PathProgramCache]: Analyzing trace with hash 300806046, now seen corresponding path program 1 times [2020-12-09 09:11:38,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:11:38,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960374859] [2020-12-09 09:11:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 09:11:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:11:46,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:11:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:11:57,060 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:11:57,126 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 09:11:57,127 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:11:57,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 09:11:57,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:11:57 BoogieIcfgContainer [2020-12-09 09:11:57,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:11:57,377 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:11:57,377 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:11:57,377 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:11:57,378 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:43" (3/4) ... [2020-12-09 09:11:57,379 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 09:11:57,405 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_473829f0-fa97-4ae1-aa5a-b9561a0f7a69/bin/utaipan/witness.graphml [2020-12-09 09:11:57,405 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:11:57,406 INFO L168 Benchmark]: Toolchain (without parser) took 82218.59 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 48.7 MB in the beginning and 66.8 MB in the end (delta: -18.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:57,406 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 67.1 MB. Free memory was 50.1 MB in the beginning and 50.0 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:11:57,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.60 ms. Allocated memory is still 67.1 MB. Free memory was 48.5 MB in the beginning and 38.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:57,407 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.89 ms. Allocated memory is still 67.1 MB. Free memory was 38.1 MB in the beginning and 51.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:57,407 INFO L168 Benchmark]: Boogie Preprocessor took 19.98 ms. Allocated memory is still 67.1 MB. Free memory was 51.1 MB in the beginning and 49.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:11:57,408 INFO L168 Benchmark]: RCFGBuilder took 8072.51 ms. Allocated memory is still 67.1 MB. Free memory was 49.9 MB in the beginning and 37.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:57,408 INFO L168 Benchmark]: TraceAbstraction took 73900.85 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 37.1 MB in the beginning and 68.9 MB in the end (delta: -31.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:11:57,408 INFO L168 Benchmark]: Witness Printer took 27.84 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 66.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:57,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 67.1 MB. Free memory was 50.1 MB in the beginning and 50.0 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 153.60 ms. Allocated memory is still 67.1 MB. Free memory was 48.5 MB in the beginning and 38.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.89 ms. Allocated memory is still 67.1 MB. Free memory was 38.1 MB in the beginning and 51.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.98 ms. Allocated memory is still 67.1 MB. Free memory was 51.1 MB in the beginning and 49.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 8072.51 ms. Allocated memory is still 67.1 MB. Free memory was 49.9 MB in the beginning and 37.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 73900.85 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 37.1 MB in the beginning and 68.9 MB in the end (delta: -31.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 27.84 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 66.8 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: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int r; [L26] double a, x; [L27] a = __VERIFIER_nondet_double() [L28] x = a / 2.0 [L29] r = 0 [L31] COND TRUE 1 [L17] COND FALSE !(!(cond)) [L34] COND FALSE !(!(x > r)) [L36] x = x - r [L37] r = r + 1 [L31] COND TRUE 1 [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 73.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 1 SDslu, 20 SDs, 0 SdLazy, 3 SolverSat, 0 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 9.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 9.3s SatisfiabilityAnalysisTime, 43.3s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 3 QuantifiedInterpolants, 1501 SizeOfPredicates, 13 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...