./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=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/freire1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --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=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/freire1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --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 [2020-12-03 01:09:30,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 01:09:30,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 01:09:30,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 01:09:30,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 01:09:30,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 01:09:30,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 01:09:30,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 01:09:30,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 01:09:30,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 01:09:30,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 01:09:30,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 01:09:30,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 01:09:30,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 01:09:30,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 01:09:30,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 01:09:30,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 01:09:30,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 01:09:30,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 01:09:30,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 01:09:30,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 01:09:30,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 01:09:30,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 01:09:30,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 01:09:30,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 01:09:30,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 01:09:30,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 01:09:30,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 01:09:30,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 01:09:30,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 01:09:30,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 01:09:30,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 01:09:30,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 01:09:30,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 01:09:30,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 01:09:30,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 01:09:30,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 01:09:30,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 01:09:30,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 01:09:30,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 01:09:30,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 01:09:30,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-03 01:09:30,952 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 01:09:30,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 01:09:30,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 01:09:30,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 01:09:30,957 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 01:09:30,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 01:09:30,957 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 01:09:30,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 01:09:30,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 01:09:30,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 01:09:30,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 01:09:30,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 01:09:30,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 01:09:30,960 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 01:09:30,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 01:09:30,961 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 01:09:30,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 01:09:30,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 01:09:30,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 01:09:30,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 01:09:30,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:09:30,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 01:09:30,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 01:09:30,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 01:09:30,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-03 01:09:30,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 01:09:30,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 01:09:30,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 01:09:30,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b056c40c352516a88a49e796700e87b5fe62c1cb [2020-12-03 01:09:31,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 01:09:31,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 01:09:31,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 01:09:31,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 01:09:31,468 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 01:09:31,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/freire1.c [2020-12-03 01:09:31,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e640e02/cb0862e846174b88adeb4cc90c987d8f/FLAGfd9796ab5 [2020-12-03 01:09:32,146 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 01:09:32,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c [2020-12-03 01:09:32,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e640e02/cb0862e846174b88adeb4cc90c987d8f/FLAGfd9796ab5 [2020-12-03 01:09:32,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e640e02/cb0862e846174b88adeb4cc90c987d8f [2020-12-03 01:09:32,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 01:09:32,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 01:09:32,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 01:09:32,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 01:09:32,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 01:09:32,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fda7418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32, skipping insertion in model container [2020-12-03 01:09:32,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 01:09:32,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 01:09:32,839 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2020-12-03 01:09:32,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:09:32,879 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 01:09:32,896 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2020-12-03 01:09:32,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:09:32,924 INFO L208 MainTranslator]: Completed translation [2020-12-03 01:09:32,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32 WrapperNode [2020-12-03 01:09:32,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 01:09:32,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 01:09:32,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 01:09:32,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 01:09:32,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 01:09:32,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 01:09:32,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 01:09:32,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 01:09:32,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (1/1) ... [2020-12-03 01:09:32,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 01:09:32,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 01:09:32,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 01:09:32,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 01:09:32,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-03 01:09:33,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 01:09:33,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 01:09:33,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 01:09:33,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 01:09:33,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 01:09:33,376 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-03 01:09:33,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:09:33 BoogieIcfgContainer [2020-12-03 01:09:33,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 01:09:33,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 01:09:33,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 01:09:33,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 01:09:33,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:09:32" (1/3) ... [2020-12-03 01:09:33,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d440d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:09:33, skipping insertion in model container [2020-12-03 01:09:33,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:32" (2/3) ... [2020-12-03 01:09:33,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d440d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:09:33, skipping insertion in model container [2020-12-03 01:09:33,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:09:33" (3/3) ... [2020-12-03 01:09:33,389 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1.c [2020-12-03 01:09:33,409 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 01:09:33,413 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-03 01:09:33,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-03 01:09:33,490 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 01:09:33,492 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 01:09:33,492 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 01:09:33,493 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 01:09:33,493 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 01:09:33,493 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 01:09:33,493 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 01:09:33,494 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 01:09:33,529 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-03 01:09:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 01:09:33,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:33,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 01:09:33,536 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:33,543 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2020-12-03 01:09:33,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:09:33,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350050098] [2020-12-03 01:09:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:09:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:09:33,681 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:09:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:09:33,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:09:33,724 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-03 01:09:33,725 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 01:09:33,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 01:09:33,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:09:33 BoogieIcfgContainer [2020-12-03 01:09:33,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 01:09:33,750 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 01:09:33,751 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 01:09:33,751 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 01:09:33,751 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:09:33" (3/4) ... [2020-12-03 01:09:33,755 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 01:09:33,755 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 01:09:33,758 INFO L168 Benchmark]: Toolchain (without parser) took 1241.92 ms. Allocated memory was 52.4 MB in the beginning and 71.3 MB in the end (delta: 18.9 MB). Free memory was 29.2 MB in the beginning and 37.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 16.1 GB. [2020-12-03 01:09:33,759 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 52.4 MB. Free memory is still 36.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:09:33,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.02 ms. Allocated memory is still 52.4 MB. Free memory was 29.0 MB in the beginning and 32.4 MB in the end (delta: -3.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-12-03 01:09:33,762 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.81 ms. Allocated memory is still 52.4 MB. Free memory was 32.4 MB in the beginning and 31.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:09:33,763 INFO L168 Benchmark]: Boogie Preprocessor took 26.10 ms. Allocated memory is still 52.4 MB. Free memory was 31.1 MB in the beginning and 30.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:09:33,764 INFO L168 Benchmark]: RCFGBuilder took 382.04 ms. Allocated memory was 52.4 MB in the beginning and 71.3 MB in the end (delta: 18.9 MB). Free memory was 29.8 MB in the beginning and 50.1 MB in the end (delta: -20.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2020-12-03 01:09:33,765 INFO L168 Benchmark]: TraceAbstraction took 369.11 ms. Allocated memory is still 71.3 MB. Free memory was 49.9 MB in the beginning and 37.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 01:09:33,766 INFO L168 Benchmark]: Witness Printer took 5.14 ms. Allocated memory is still 71.3 MB. Free memory was 37.9 MB in the beginning and 37.8 MB in the end (delta: 157.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:09:33,771 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 52.4 MB. Free memory is still 36.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 407.02 ms. Allocated memory is still 52.4 MB. Free memory was 29.0 MB in the beginning and 32.4 MB in the end (delta: -3.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.81 ms. Allocated memory is still 52.4 MB. Free memory was 32.4 MB in the beginning and 31.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.10 ms. Allocated memory is still 52.4 MB. Free memory was 31.1 MB in the beginning and 30.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 382.04 ms. Allocated memory was 52.4 MB in the beginning and 71.3 MB in the end (delta: 18.9 MB). Free memory was 29.8 MB in the beginning and 50.1 MB in the end (delta: -20.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 369.11 ms. Allocated memory is still 71.3 MB. Free memory was 49.9 MB in the beginning and 37.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 5.14 ms. Allocated memory is still 71.3 MB. Free memory was 37.9 MB in the beginning and 37.8 MB in the end (delta: 157.0 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, 15 locations, 2 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=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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 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 [2020-12-03 01:09:36,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 01:09:36,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 01:09:36,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 01:09:36,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 01:09:36,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 01:09:36,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 01:09:36,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 01:09:36,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 01:09:36,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 01:09:36,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 01:09:36,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 01:09:36,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 01:09:36,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 01:09:36,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 01:09:36,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 01:09:36,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 01:09:36,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 01:09:36,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 01:09:36,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 01:09:36,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 01:09:36,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 01:09:36,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 01:09:36,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 01:09:36,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 01:09:36,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 01:09:36,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 01:09:36,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 01:09:36,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 01:09:36,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 01:09:36,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 01:09:36,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 01:09:36,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 01:09:36,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 01:09:36,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 01:09:36,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 01:09:36,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 01:09:36,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 01:09:36,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 01:09:36,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 01:09:36,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 01:09:36,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-03 01:09:36,659 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 01:09:36,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 01:09:36,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 01:09:36,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 01:09:36,661 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 01:09:36,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 01:09:36,662 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 01:09:36,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 01:09:36,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 01:09:36,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 01:09:36,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 01:09:36,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 01:09:36,663 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 01:09:36,664 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 01:09:36,664 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 01:09:36,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 01:09:36,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 01:09:36,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 01:09:36,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 01:09:36,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 01:09:36,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 01:09:36,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:09:36,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 01:09:36,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 01:09:36,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 01:09:36,667 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-03 01:09:36,667 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 01:09:36,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 01:09:36,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 01:09:36,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 01:09:36,668 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b056c40c352516a88a49e796700e87b5fe62c1cb [2020-12-03 01:09:37,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 01:09:37,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 01:09:37,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 01:09:37,134 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 01:09:37,141 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 01:09:37,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/freire1.c [2020-12-03 01:09:37,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86c33f35d/a4973d411d0b40b0a5a88368dca98d57/FLAG17b1ec199 [2020-12-03 01:09:37,923 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 01:09:37,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c [2020-12-03 01:09:37,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86c33f35d/a4973d411d0b40b0a5a88368dca98d57/FLAG17b1ec199 [2020-12-03 01:09:38,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86c33f35d/a4973d411d0b40b0a5a88368dca98d57 [2020-12-03 01:09:38,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 01:09:38,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 01:09:38,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 01:09:38,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 01:09:38,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 01:09:38,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bfaf9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38, skipping insertion in model container [2020-12-03 01:09:38,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 01:09:38,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 01:09:38,565 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2020-12-03 01:09:38,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:09:38,603 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 01:09:38,619 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c[712,725] [2020-12-03 01:09:38,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:09:38,648 INFO L208 MainTranslator]: Completed translation [2020-12-03 01:09:38,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38 WrapperNode [2020-12-03 01:09:38,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 01:09:38,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 01:09:38,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 01:09:38,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 01:09:38,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 01:09:38,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 01:09:38,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 01:09:38,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 01:09:38,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (1/1) ... [2020-12-03 01:09:38,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 01:09:38,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 01:09:38,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 01:09:38,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 01:09:38,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-03 01:09:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 01:09:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 01:09:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 01:09:38,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 01:09:47,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 01:09:47,460 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-03 01:09:47,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:09:47 BoogieIcfgContainer [2020-12-03 01:09:47,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 01:09:47,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 01:09:47,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 01:09:47,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 01:09:47,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:09:38" (1/3) ... [2020-12-03 01:09:47,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab449ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:09:47, skipping insertion in model container [2020-12-03 01:09:47,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:38" (2/3) ... [2020-12-03 01:09:47,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab449ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:09:47, skipping insertion in model container [2020-12-03 01:09:47,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:09:47" (3/3) ... [2020-12-03 01:09:47,482 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1.c [2020-12-03 01:09:47,499 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 01:09:47,502 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-03 01:09:47,516 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-03 01:09:47,543 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 01:09:47,543 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 01:09:47,543 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 01:09:47,543 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 01:09:47,543 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 01:09:47,544 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 01:09:47,544 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 01:09:47,544 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 01:09:47,558 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-03 01:09:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 01:09:47,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:47,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 01:09:47,565 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:47,571 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2020-12-03 01:09:47,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:09:47,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640126233] [2020-12-03 01:09:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-03 01:09:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:09:49,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 01:09:49,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:09:51,710 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x~0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) c_currentRoundingMode 2.0))) (= c_currentRoundingMode roundNearestTiesToEven) (= (_ bv0 32) c_ULTIMATE.start_main_~r~0)) is different from false [2020-12-03 01:10:02,006 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 [2020-12-03 01:10:08,149 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 [2020-12-03 01:10:10,185 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 [2020-12-03 01:10:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:10,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:10:10,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640126233] [2020-12-03 01:10:10,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:10:10,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:10:10,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596810331] [2020-12-03 01:10:10,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:10:10,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:10:10,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:10:10,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=5, Unknown=4, NotChecked=12, Total=30 [2020-12-03 01:10:10,217 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 6 states. [2020-12-03 01:10:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:19,091 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2020-12-03 01:10:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 01:10:19,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-03 01:10:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:19,145 INFO L225 Difference]: With dead ends: 31 [2020-12-03 01:10:19,146 INFO L226 Difference]: Without dead ends: 13 [2020-12-03 01:10:19,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=9, Invalid=5, Unknown=4, NotChecked=12, Total=30 [2020-12-03 01:10:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-03 01:10:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-03 01:10:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-03 01:10:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-03 01:10:19,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 5 [2020-12-03 01:10:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:19,181 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-03 01:10:19,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:10:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-03 01:10:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:10:19,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:19,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:19,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 01:10:19,393 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:19,395 INFO L82 PathProgramCache]: Analyzing trace with hash 300765331, now seen corresponding path program 1 times [2020-12-03 01:10:19,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:10:19,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585686530] [2020-12-03 01:10:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-03 01:10:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:19,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 01:10:19,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:21,854 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 [2020-12-03 01:10:23,902 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 [2020-12-03 01:10:25,963 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 [2020-12-03 01:10:28,014 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 [2020-12-03 01:10:34,196 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 [2020-12-03 01:10:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:34,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:10:34,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585686530] [2020-12-03 01:10:34,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:10:34,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 01:10:34,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074421533] [2020-12-03 01:10:34,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 01:10:34,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:10:34,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 01:10:34,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=2, Unknown=5, NotChecked=6, Total=20 [2020-12-03 01:10:34,213 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-12-03 01:10:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:34,216 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-03 01:10:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:10:34,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-03 01:10:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:34,217 INFO L225 Difference]: With dead ends: 13 [2020-12-03 01:10:34,218 INFO L226 Difference]: Without dead ends: 9 [2020-12-03 01:10:34,219 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 [2020-12-03 01:10:34,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-03 01:10:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-03 01:10:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-03 01:10:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-03 01:10:34,222 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 8 [2020-12-03 01:10:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:34,223 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-03 01:10:34,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 01:10:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-03 01:10:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:10:34,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:34,224 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:34,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 01:10:34,440 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:34,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:34,441 INFO L82 PathProgramCache]: Analyzing trace with hash 300806046, now seen corresponding path program 1 times [2020-12-03 01:10:34,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:10:34,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886962232] [2020-12-03 01:10:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-03 01:10:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:10:42,682 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:10:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:10:54,338 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:10:54,448 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-03 01:10:54,448 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 01:10:54,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-03 01:10:54,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:10:54 BoogieIcfgContainer [2020-12-03 01:10:54,675 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 01:10:54,676 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 01:10:54,676 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 01:10:54,676 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 01:10:54,677 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:09:47" (3/4) ... [2020-12-03 01:10:54,679 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 01:10:54,727 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-03 01:10:54,727 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 01:10:54,730 INFO L168 Benchmark]: Toolchain (without parser) took 76434.54 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 19.9 MB in the beginning and 26.3 MB in the end (delta: -6.4 MB). Peak memory consumption was 3.9 MB. Max. memory is 16.1 GB. [2020-12-03 01:10:54,730 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 41.9 MB. Free memory was 22.8 MB in the beginning and 22.7 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:10:54,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.35 ms. Allocated memory is still 41.9 MB. Free memory was 19.7 MB in the beginning and 18.7 MB in the end (delta: 996.3 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-12-03 01:10:54,732 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.94 ms. Allocated memory is still 41.9 MB. Free memory was 18.6 MB in the beginning and 17.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:10:54,733 INFO L168 Benchmark]: Boogie Preprocessor took 33.08 ms. Allocated memory is still 41.9 MB. Free memory was 17.2 MB in the beginning and 16.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:10:54,733 INFO L168 Benchmark]: RCFGBuilder took 8718.86 ms. Allocated memory is still 50.3 MB. Free memory was 35.9 MB in the beginning and 23.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 01:10:54,734 INFO L168 Benchmark]: TraceAbstraction took 67206.40 ms. Allocated memory is still 50.3 MB. Free memory was 34.8 MB in the beginning and 28.1 MB in the end (delta: 6.8 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2020-12-03 01:10:54,735 INFO L168 Benchmark]: Witness Printer took 51.55 ms. Allocated memory is still 50.3 MB. Free memory was 28.1 MB in the beginning and 26.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:10:54,739 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 41.9 MB. Free memory was 22.8 MB in the beginning and 22.7 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 349.35 ms. Allocated memory is still 41.9 MB. Free memory was 19.7 MB in the beginning and 18.7 MB in the end (delta: 996.3 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.94 ms. Allocated memory is still 41.9 MB. Free memory was 18.6 MB in the beginning and 17.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.08 ms. Allocated memory is still 41.9 MB. Free memory was 17.2 MB in the beginning and 16.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 8718.86 ms. Allocated memory is still 50.3 MB. Free memory was 35.9 MB in the beginning and 23.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 67206.40 ms. Allocated memory is still 50.3 MB. Free memory was 34.8 MB in the beginning and 28.1 MB in the end (delta: 6.8 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Witness Printer took 51.55 ms. Allocated memory is still 50.3 MB. Free memory was 28.1 MB in the beginning and 26.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 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: 67.1s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 0 SDslu, 29 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4s 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, 10.4s SatisfiabilityAnalysisTime, 35.0s 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...