./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ee8e70e7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 a0e23aa9bbb10ea2680f8206f9d74b19166b1199 .................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 a0e23aa9bbb10ea2680f8206f9d74b19166b1199 ........................................................................................................................................................................................................................................................................................................ 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-ee8e70e [2020-10-24 15:12:18,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 15:12:18,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 15:12:18,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 15:12:18,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 15:12:18,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 15:12:18,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 15:12:18,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 15:12:18,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 15:12:18,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 15:12:18,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 15:12:18,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 15:12:18,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 15:12:18,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 15:12:18,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 15:12:18,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 15:12:18,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 15:12:18,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 15:12:18,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 15:12:18,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 15:12:18,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 15:12:18,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 15:12:18,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 15:12:18,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 15:12:18,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 15:12:18,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 15:12:18,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 15:12:18,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 15:12:18,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 15:12:18,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 15:12:18,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 15:12:18,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 15:12:18,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 15:12:18,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 15:12:18,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 15:12:18,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 15:12:18,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 15:12:18,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 15:12:18,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 15:12:18,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 15:12:18,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 15:12:18,872 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 15:12:18,900 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 15:12:18,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 15:12:18,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 15:12:18,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 15:12:18,903 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 15:12:18,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 15:12:18,903 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 15:12:18,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 15:12:18,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 15:12:18,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 15:12:18,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 15:12:18,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 15:12:18,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 15:12:18,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 15:12:18,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 15:12:18,906 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 15:12:18,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 15:12:18,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 15:12:18,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 15:12:18,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 15:12:18,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 15:12:18,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 15:12:18,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 15:12:18,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 15:12:18,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 15:12:18,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 15:12:18,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 15:12:18,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 15:12:18,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 15:12:18,911 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-10-24 15:12:19,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 15:12:19,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 15:12:19,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 15:12:19,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 15:12:19,367 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 15:12:19,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-10-24 15:12:19,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f893c6b1/9c503e38f9c14cfb9f7f9419dd5027f7/FLAG1d0da983c [2020-10-24 15:12:20,070 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 15:12:20,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-10-24 15:12:20,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f893c6b1/9c503e38f9c14cfb9f7f9419dd5027f7/FLAG1d0da983c [2020-10-24 15:12:20,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f893c6b1/9c503e38f9c14cfb9f7f9419dd5027f7 [2020-10-24 15:12:20,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 15:12:20,453 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 15:12:20,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 15:12:20,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 15:12:20,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 15:12:20,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc60be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20, skipping insertion in model container [2020-10-24 15:12:20,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,476 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 15:12:20,497 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 15:12:20,731 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 15:12:20,741 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 15:12:20,761 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 15:12:20,778 INFO L217 MainTranslator]: Completed translation [2020-10-24 15:12:20,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20 WrapperNode [2020-10-24 15:12:20,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 15:12:20,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 15:12:20,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 15:12:20,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 15:12:20,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 15:12:20,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 15:12:20,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 15:12:20,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 15:12:20,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (1/1) ... [2020-10-24 15:12:20,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 15:12:20,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 15:12:20,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 15:12:20,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 15:12:20,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-24 15:12:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 15:12:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 15:12:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 15:12:20,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 15:12:21,404 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 15:12:21,405 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-24 15:12:21,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:12:21 BoogieIcfgContainer [2020-10-24 15:12:21,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 15:12:21,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 15:12:21,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 15:12:21,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 15:12:21,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 03:12:20" (1/3) ... [2020-10-24 15:12:21,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146b3ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:12:21, skipping insertion in model container [2020-10-24 15:12:21,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:20" (2/3) ... [2020-10-24 15:12:21,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146b3ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:12:21, skipping insertion in model container [2020-10-24 15:12:21,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:12:21" (3/3) ... [2020-10-24 15:12:21,427 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-10-24 15:12:21,448 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 15:12:21,454 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 15:12:21,471 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 15:12:21,515 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 15:12:21,516 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 15:12:21,516 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 15:12:21,516 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 15:12:21,516 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 15:12:21,517 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 15:12:21,517 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 15:12:21,517 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 15:12:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-24 15:12:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 15:12:21,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 15:12:21,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 15:12:21,545 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 15:12:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 15:12:21,554 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-10-24 15:12:21,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 15:12:21,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323780957] [2020-10-24 15:12:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 15:12:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 15:12:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 15:12:21,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323780957] [2020-10-24 15:12:21,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 15:12:21,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 15:12:21,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081758944] [2020-10-24 15:12:21,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 15:12:21,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 15:12:21,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 15:12:21,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 15:12:21,826 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-24 15:12:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 15:12:21,849 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-24 15:12:21,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 15:12:21,851 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 15:12:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 15:12:21,859 INFO L225 Difference]: With dead ends: 21 [2020-10-24 15:12:21,860 INFO L226 Difference]: Without dead ends: 8 [2020-10-24 15:12:21,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 15:12:21,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-24 15:12:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-24 15:12:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-24 15:12:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-10-24 15:12:21,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-10-24 15:12:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 15:12:21,901 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-10-24 15:12:21,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 15:12:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-10-24 15:12:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-24 15:12:21,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 15:12:21,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-24 15:12:21,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 15:12:21,903 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 15:12:21,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 15:12:21,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-10-24 15:12:21,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 15:12:21,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659183015] [2020-10-24 15:12:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 15:12:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 15:12:21,937 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 15:12:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 15:12:21,958 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 15:12:21,981 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 15:12:21,982 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 15:12:21,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 15:12:22,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 03:12:22 BoogieIcfgContainer [2020-10-24 15:12:22,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 15:12:22,010 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 15:12:22,010 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 15:12:22,010 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 15:12:22,011 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:12:21" (3/4) ... [2020-10-24 15:12:22,015 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 15:12:22,015 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 15:12:22,018 INFO L168 Benchmark]: Toolchain (without parser) took 1568.59 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 28.3 MB in the beginning and 37.5 MB in the end (delta: -9.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-10-24 15:12:22,019 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 50.3 MB. Free memory was 32.8 MB in the beginning and 32.7 MB in the end (delta: 34.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 15:12:22,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.90 ms. Allocated memory is still 50.3 MB. Free memory was 27.7 MB in the beginning and 31.3 MB in the end (delta: -3.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-10-24 15:12:22,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.15 ms. Allocated memory is still 50.3 MB. Free memory was 31.3 MB in the beginning and 29.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 15:12:22,022 INFO L168 Benchmark]: Boogie Preprocessor took 26.27 ms. Allocated memory is still 50.3 MB. Free memory was 29.9 MB in the beginning and 28.9 MB in the end (delta: 995.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 15:12:22,023 INFO L168 Benchmark]: RCFGBuilder took 561.74 ms. Allocated memory is still 50.3 MB. Free memory was 28.9 MB in the beginning and 31.5 MB in the end (delta: -2.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-10-24 15:12:22,026 INFO L168 Benchmark]: TraceAbstraction took 595.78 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 31.0 MB in the beginning and 38.1 MB in the end (delta: -7.1 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-24 15:12:22,027 INFO L168 Benchmark]: Witness Printer took 5.20 ms. Allocated memory is still 62.9 MB. Free memory was 38.1 MB in the beginning and 37.8 MB in the end (delta: 292.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 15:12:22,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 50.3 MB. Free memory was 32.8 MB in the beginning and 32.7 MB in the end (delta: 34.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 322.90 ms. Allocated memory is still 50.3 MB. Free memory was 27.7 MB in the beginning and 31.3 MB in the end (delta: -3.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.15 ms. Allocated memory is still 50.3 MB. Free memory was 31.3 MB in the beginning and 29.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.27 ms. Allocated memory is still 50.3 MB. Free memory was 29.9 MB in the beginning and 28.9 MB in the end (delta: 995.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 561.74 ms. Allocated memory is still 50.3 MB. Free memory was 28.9 MB in the beginning and 31.5 MB in the end (delta: -2.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 595.78 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 31.0 MB in the beginning and 38.1 MB in the end (delta: -7.1 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Witness Printer took 5.20 ms. Allocated memory is still 62.9 MB. Free memory was 38.1 MB in the beginning and 37.8 MB in the end (delta: 292.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 29, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 37. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L9] __assert_fail("0", "loop1-2.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-ee8e70e [2020-10-24 15:12:24,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 15:12:24,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 15:12:24,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 15:12:24,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 15:12:24,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 15:12:24,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 15:12:24,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 15:12:24,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 15:12:24,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 15:12:24,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 15:12:24,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 15:12:24,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 15:12:24,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 15:12:24,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 15:12:24,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 15:12:24,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 15:12:24,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 15:12:24,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 15:12:24,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 15:12:24,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 15:12:24,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 15:12:24,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 15:12:24,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 15:12:24,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 15:12:24,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 15:12:24,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 15:12:24,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 15:12:24,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 15:12:24,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 15:12:24,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 15:12:24,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 15:12:24,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 15:12:24,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 15:12:24,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 15:12:24,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 15:12:24,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 15:12:24,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 15:12:24,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 15:12:24,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 15:12:24,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 15:12:24,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 15:12:24,887 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 15:12:24,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 15:12:24,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 15:12:24,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 15:12:24,891 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 15:12:24,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 15:12:24,892 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 15:12:24,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 15:12:24,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 15:12:24,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 15:12:24,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 15:12:24,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 15:12:24,894 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 15:12:24,894 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 15:12:24,894 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 15:12:24,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 15:12:24,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 15:12:24,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 15:12:24,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 15:12:24,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 15:12:24,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 15:12:24,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 15:12:24,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 15:12:24,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 15:12:24,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 15:12:24,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 15:12:24,897 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 15:12:24,898 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 15:12:24,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 15:12:24,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 15:12:24,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 15:12:24,898 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-10-24 15:12:25,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 15:12:25,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 15:12:25,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 15:12:25,375 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 15:12:25,376 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 15:12:25,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-10-24 15:12:25,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c622342d/d705ded34815407f921bbeb2006a8181/FLAG3ea025232 [2020-10-24 15:12:26,096 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 15:12:26,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-10-24 15:12:26,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c622342d/d705ded34815407f921bbeb2006a8181/FLAG3ea025232 [2020-10-24 15:12:26,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c622342d/d705ded34815407f921bbeb2006a8181 [2020-10-24 15:12:26,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 15:12:26,449 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 15:12:26,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 15:12:26,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 15:12:26,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 15:12:26,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@426defa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26, skipping insertion in model container [2020-10-24 15:12:26,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,470 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 15:12:26,490 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 15:12:26,675 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 15:12:26,691 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 15:12:26,711 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 15:12:26,734 INFO L217 MainTranslator]: Completed translation [2020-10-24 15:12:26,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26 WrapperNode [2020-10-24 15:12:26,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 15:12:26,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 15:12:26,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 15:12:26,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 15:12:26,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 15:12:26,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 15:12:26,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 15:12:26,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 15:12:26,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (1/1) ... [2020-10-24 15:12:26,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 15:12:26,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 15:12:26,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 15:12:26,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 15:12:26,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-24 15:12:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-10-24 15:12:26,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 15:12:26,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 15:12:26,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 15:12:26,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 15:12:26,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-10-24 15:12:31,460 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 15:12:31,460 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-24 15:12:31,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:12:31 BoogieIcfgContainer [2020-10-24 15:12:31,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 15:12:31,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 15:12:31,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 15:12:31,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 15:12:31,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 03:12:26" (1/3) ... [2020-10-24 15:12:31,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52114c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:12:31, skipping insertion in model container [2020-10-24 15:12:31,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:12:26" (2/3) ... [2020-10-24 15:12:31,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52114c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:12:31, skipping insertion in model container [2020-10-24 15:12:31,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:12:31" (3/3) ... [2020-10-24 15:12:31,480 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-10-24 15:12:31,493 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 15:12:31,499 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 15:12:31,513 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 15:12:31,542 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 15:12:31,542 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 15:12:31,542 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 15:12:31,542 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 15:12:31,543 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 15:12:31,543 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 15:12:31,543 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 15:12:31,543 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 15:12:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-24 15:12:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 15:12:31,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 15:12:31,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 15:12:31,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 15:12:31,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 15:12:31,571 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-10-24 15:12:31,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 15:12:31,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39481842] [2020-10-24 15:12:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-24 15:12:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 15:12:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 15:12:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 15:12:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 15:12:32,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 15:12:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 15:12:32,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39481842] [2020-10-24 15:12:32,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 15:12:32,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 15:12:32,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241435551] [2020-10-24 15:12:32,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 15:12:32,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 15:12:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 15:12:32,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 15:12:32,205 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-24 15:12:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 15:12:32,224 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-24 15:12:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 15:12:32,243 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 15:12:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 15:12:32,255 INFO L225 Difference]: With dead ends: 21 [2020-10-24 15:12:32,255 INFO L226 Difference]: Without dead ends: 8 [2020-10-24 15:12:32,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 15:12:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-24 15:12:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-24 15:12:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-24 15:12:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-10-24 15:12:32,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-10-24 15:12:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 15:12:32,294 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-10-24 15:12:32,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 15:12:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-10-24 15:12:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-24 15:12:32,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 15:12:32,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-24 15:12:32,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 15:12:32,510 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 15:12:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 15:12:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-10-24 15:12:32,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 15:12:32,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471586195] [2020-10-24 15:12:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-24 15:12:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 15:12:33,649 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 15:12:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 15:12:34,468 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 15:12:34,583 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-24 15:12:34,583 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 15:12:34,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 15:12:34,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 03:12:34 BoogieIcfgContainer [2020-10-24 15:12:34,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 15:12:34,829 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 15:12:34,829 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 15:12:34,829 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 15:12:34,830 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:12:31" (3/4) ... [2020-10-24 15:12:34,832 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-24 15:12:34,885 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 15:12:34,886 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 15:12:34,889 INFO L168 Benchmark]: Toolchain (without parser) took 8442.46 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 33.4 MB in the beginning and 38.8 MB in the end (delta: -5.3 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-24 15:12:34,890 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 35.7 MB. Free memory was 22.7 MB in the beginning and 22.7 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 15:12:34,890 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.22 ms. Allocated memory is still 48.2 MB. Free memory was 32.8 MB in the beginning and 22.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-24 15:12:34,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.51 ms. Allocated memory is still 48.2 MB. Free memory was 22.1 MB in the beginning and 20.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 15:12:34,892 INFO L168 Benchmark]: Boogie Preprocessor took 47.58 ms. Allocated memory is still 48.2 MB. Free memory was 20.6 MB in the beginning and 32.9 MB in the end (delta: -12.3 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2020-10-24 15:12:34,893 INFO L168 Benchmark]: RCFGBuilder took 4629.03 ms. Allocated memory is still 48.2 MB. Free memory was 32.9 MB in the beginning and 19.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-10-24 15:12:34,894 INFO L168 Benchmark]: TraceAbstraction took 3364.29 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 19.5 MB in the beginning and 40.8 MB in the end (delta: -21.3 MB). Peak memory consumption was 1.7 MB. Max. memory is 16.1 GB. [2020-10-24 15:12:34,894 INFO L168 Benchmark]: Witness Printer took 56.86 ms. Allocated memory is still 58.7 MB. Free memory was 40.6 MB in the beginning and 38.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 15:12:34,899 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 35.7 MB. Free memory was 22.7 MB in the beginning and 22.7 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.22 ms. Allocated memory is still 48.2 MB. Free memory was 32.8 MB in the beginning and 22.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.51 ms. Allocated memory is still 48.2 MB. Free memory was 22.1 MB in the beginning and 20.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.58 ms. Allocated memory is still 48.2 MB. Free memory was 20.6 MB in the beginning and 32.9 MB in the end (delta: -12.3 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4629.03 ms. Allocated memory is still 48.2 MB. Free memory was 32.9 MB in the beginning and 19.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3364.29 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 19.5 MB in the beginning and 40.8 MB in the end (delta: -21.3 MB). Peak memory consumption was 1.7 MB. Max. memory is 16.1 GB. * Witness Printer took 56.86 ms. Allocated memory is still 58.7 MB. Free memory was 40.6 MB in the beginning and 38.8 MB in the end (delta: 1.8 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: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] EXPR 1.0 [L21] float exp = 1.0 ; [L22] EXPR 1.0 [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] EXPR 1-x [L24] EXPR 1/(1-x) [L24] EXPR 2*(1/(1-x)) [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] EXPR x/count [L29] EXPR term * (x/count) [L29] term = term * (x/count) [L30] EXPR exp + term [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L9] __assert_fail("0", "loop1-2.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 36 ConjunctsInSsa, 1 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...