./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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/loop-floats-scientific-comp/loop2-1.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 02e16371708027ec56fdf0402c3e1a5d4f23a0ff ......................................................................................................................................................................................................................................................................................................................................... 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/loop-floats-scientific-comp/loop2-1.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 02e16371708027ec56fdf0402c3e1a5d4f23a0ff ............................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-5485861 [2020-10-25 22:01:34,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:01:34,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:01:34,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:01:34,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:01:34,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:01:34,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:01:34,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:01:34,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:01:34,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:01:34,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:01:34,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:01:34,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:01:34,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:01:34,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:01:34,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:01:34,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:01:34,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:01:34,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:01:34,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:01:34,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:01:34,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:01:34,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:01:34,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:01:34,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:01:34,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:01:34,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:01:34,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:01:34,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:01:34,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:01:34,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:01:34,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:01:34,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:01:34,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:01:34,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:01:34,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:01:34,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:01:34,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:01:34,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:01:34,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:01:34,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:01:34,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:01:34,948 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:01:34,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:01:34,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:01:34,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:01:34,951 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:01:34,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:01:34,951 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:01:34,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:01:34,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:01:34,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:01:34,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:01:34,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:01:34,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:01:34,953 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:01:34,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:01:34,953 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:01:34,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:01:34,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:01:34,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:01:34,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:01:34,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:01:34,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:01:34,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:01:34,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:01:34,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:01:34,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:01:34,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:01:34,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:01:34,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:01:34,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2020-10-25 22:01:35,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:01:35,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:01:35,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:01:35,395 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:01:35,396 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:01:35,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-10-25 22:01:35,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ecbf2c7/8109b035c9234a11a7dfaac839d17a2e/FLAGbde266923 [2020-10-25 22:01:36,071 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:01:36,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-10-25 22:01:36,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ecbf2c7/8109b035c9234a11a7dfaac839d17a2e/FLAGbde266923 [2020-10-25 22:01:36,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ecbf2c7/8109b035c9234a11a7dfaac839d17a2e [2020-10-25 22:01:36,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:01:36,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:01:36,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:36,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:01:36,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:01:36,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141049a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36, skipping insertion in model container [2020-10-25 22:01:36,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:01:36,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:01:36,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:36,775 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:01:36,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:36,819 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:01:36,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36 WrapperNode [2020-10-25 22:01:36,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:36,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:36,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:01:36,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:01:36,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:36,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:01:36,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:01:36,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:01:36,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (1/1) ... [2020-10-25 22:01:36,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:01:36,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:01:36,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:01:36,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:01:36,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (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 [2020-10-25 22:01:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:01:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:01:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:01:37,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:01:37,629 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:01:37,629 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-25 22:01:37,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:37 BoogieIcfgContainer [2020-10-25 22:01:37,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:01:37,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:01:37,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:01:37,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:01:37,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:01:36" (1/3) ... [2020-10-25 22:01:37,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d42651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:37, skipping insertion in model container [2020-10-25 22:01:37,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:36" (2/3) ... [2020-10-25 22:01:37,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d42651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:37, skipping insertion in model container [2020-10-25 22:01:37,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:37" (3/3) ... [2020-10-25 22:01:37,646 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-10-25 22:01:37,661 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:01:37,667 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:01:37,682 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:01:37,735 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:01:37,735 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:01:37,736 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:01:37,736 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:01:37,736 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:01:37,736 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:01:37,736 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:01:37,736 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:01:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-25 22:01:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-25 22:01:37,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:37,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:37,763 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-10-25 22:01:37,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:37,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321552033] [2020-10-25 22:01:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:38,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321552033] [2020-10-25 22:01:38,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:38,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:01:38,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157886722] [2020-10-25 22:01:38,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:01:38,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:38,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:01:38,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:01:38,033 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-25 22:01:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:38,052 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-10-25 22:01:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:01:38,054 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-25 22:01:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:38,077 INFO L225 Difference]: With dead ends: 30 [2020-10-25 22:01:38,077 INFO L226 Difference]: Without dead ends: 12 [2020-10-25 22:01:38,082 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 [2020-10-25 22:01:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-25 22:01:38,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-25 22:01:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-25 22:01:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-25 22:01:38,122 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-10-25 22:01:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:38,123 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-25 22:01:38,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:01:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-25 22:01:38,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:01:38,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:38,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:38,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:01:38,127 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:38,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-10-25 22:01:38,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:38,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669916332] [2020-10-25 22:01:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:38,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669916332] [2020-10-25 22:01:38,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:38,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:01:38,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809793487] [2020-10-25 22:01:38,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:01:38,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:38,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:01:38,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:01:38,304 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-25 22:01:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:38,342 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-25 22:01:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:01:38,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-25 22:01:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:38,344 INFO L225 Difference]: With dead ends: 23 [2020-10-25 22:01:38,344 INFO L226 Difference]: Without dead ends: 15 [2020-10-25 22:01:38,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:01:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-25 22:01:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-25 22:01:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-25 22:01:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-25 22:01:38,349 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-25 22:01:38,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:38,349 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-25 22:01:38,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:01:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-25 22:01:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:01:38,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:38,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:38,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:01:38,351 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:38,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-10-25 22:01:38,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:38,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447803160] [2020-10-25 22:01:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:01:38,377 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:01:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:01:38,405 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:01:38,431 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:01:38,431 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:01:38,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 22:01:38,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:01:38 BoogieIcfgContainer [2020-10-25 22:01:38,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:01:38,470 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:01:38,470 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:01:38,470 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:01:38,471 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:37" (3/4) ... [2020-10-25 22:01:38,475 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 22:01:38,475 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:01:38,478 INFO L168 Benchmark]: Toolchain (without parser) took 2066.00 ms. Allocated memory was 37.7 MB in the beginning and 50.3 MB in the end (delta: 12.6 MB). Free memory was 15.7 MB in the beginning and 32.6 MB in the end (delta: -16.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:38,479 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 37.7 MB. Free memory was 20.6 MB in the beginning and 20.6 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:38,480 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.73 ms. Allocated memory is still 37.7 MB. Free memory was 15.0 MB in the beginning and 14.4 MB in the end (delta: 644.7 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:38,481 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.18 ms. Allocated memory was 37.7 MB in the beginning and 50.3 MB in the end (delta: 12.6 MB). Free memory was 14.3 MB in the beginning and 35.3 MB in the end (delta: -21.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:38,482 INFO L168 Benchmark]: Boogie Preprocessor took 60.90 ms. Allocated memory is still 50.3 MB. Free memory was 35.3 MB in the beginning and 34.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:38,483 INFO L168 Benchmark]: RCFGBuilder took 660.31 ms. Allocated memory is still 50.3 MB. Free memory was 34.2 MB in the beginning and 33.5 MB in the end (delta: 667.5 kB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:38,484 INFO L168 Benchmark]: TraceAbstraction took 832.64 ms. Allocated memory is still 50.3 MB. Free memory was 33.3 MB in the beginning and 33.1 MB in the end (delta: 203.5 kB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:38,485 INFO L168 Benchmark]: Witness Printer took 5.26 ms. Allocated memory is still 50.3 MB. Free memory was 33.1 MB in the beginning and 32.6 MB in the end (delta: 527.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:38,490 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 37.7 MB. Free memory was 20.6 MB in the beginning and 20.6 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 391.73 ms. Allocated memory is still 37.7 MB. Free memory was 15.0 MB in the beginning and 14.4 MB in the end (delta: 644.7 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 84.18 ms. Allocated memory was 37.7 MB in the beginning and 50.3 MB in the end (delta: 12.6 MB). Free memory was 14.3 MB in the beginning and 35.3 MB in the end (delta: -21.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.90 ms. Allocated memory is still 50.3 MB. Free memory was 35.3 MB in the beginning and 34.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 660.31 ms. Allocated memory is still 50.3 MB. Free memory was 34.2 MB in the beginning and 33.5 MB in the end (delta: 667.5 kB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 832.64 ms. Allocated memory is still 50.3 MB. Free memory was 33.3 MB in the beginning and 33.1 MB in the end (delta: 203.5 kB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.26 ms. Allocated memory is still 50.3 MB. Free memory was 33.1 MB in the beginning and 32.6 MB in the end (delta: 527.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 49, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L14] float pi = 3.14159 ; VAL [pi=314159/100000] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=314159/100000] [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=314159/100000] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [pi=314159/100000] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=314159/100000] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=314159/100000] [L12] COND TRUE !(cond) VAL [pi=314159/100000] [L7] __assert_fail("0", "loop2-1.c", 7, "reach_error") VAL [pi=314159/100000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 1 SDslu, 8 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 189 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-5485861 [2020-10-25 22:01:41,083 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-10-25 22:01:41,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:01:41,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:01:41,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:01:41,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:01:41,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:01:41,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:01:41,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:01:41,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:01:41,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:01:41,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:01:41,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:01:41,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 22:01:41,313 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:01:41,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:01:41,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:01:41,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:01:41,317 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:01:41,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:01:41,317 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:01:41,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:01:41,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:01:41,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:01:41,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:01:41,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:01:41,320 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 22:01:41,320 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 22:01:41,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:01:41,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:01:41,321 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:01:41,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:01:41,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:01:41,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:01:41,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:01:41,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:01:41,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:01:41,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:01:41,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:01:41,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:01:41,323 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 22:01:41,323 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 22:01:41,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:01:41,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:01:41,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 22:01:41,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2020-10-25 22:01:41,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:01:41,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:01:41,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:01:41,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:01:41,867 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:01:41,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-10-25 22:01:41,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aadb9b3d/8a3a9bd092f543b489db3c933d0b9f86/FLAG92c093a72 [2020-10-25 22:01:42,594 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:01:42,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-10-25 22:01:42,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aadb9b3d/8a3a9bd092f543b489db3c933d0b9f86/FLAG92c093a72 [2020-10-25 22:01:42,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aadb9b3d/8a3a9bd092f543b489db3c933d0b9f86 [2020-10-25 22:01:42,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:01:42,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:01:42,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:42,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:01:42,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:01:42,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:42" (1/1) ... [2020-10-25 22:01:42,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ae5efd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:42, skipping insertion in model container [2020-10-25 22:01:42,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:42" (1/1) ... [2020-10-25 22:01:42,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:01:43,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:01:43,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:43,321 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:01:43,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:43,365 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:01:43,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43 WrapperNode [2020-10-25 22:01:43,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:43,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:43,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:01:43,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:01:43,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (1/1) ... [2020-10-25 22:01:43,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (1/1) ... [2020-10-25 22:01:43,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:43,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:01:43,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:01:43,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:01:43,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (1/1) ... [2020-10-25 22:01:43,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (1/1) ... [2020-10-25 22:01:43,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (1/1) ... [2020-10-25 22:01:43,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (1/1) ... [2020-10-25 22:01:43,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (1/1) ... [2020-10-25 22:01:43,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (1/1) ... [2020-10-25 22:01:43,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (1/1) ... [2020-10-25 22:01:43,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:01:43,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:01:43,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:01:43,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:01:43,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (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 [2020-10-25 22:01:43,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 22:01:43,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:01:43,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:01:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:01:49,010 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:01:49,011 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-25 22:01:49,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:49 BoogieIcfgContainer [2020-10-25 22:01:49,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:01:49,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:01:49,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:01:49,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:01:49,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:01:42" (1/3) ... [2020-10-25 22:01:49,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57051124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:49, skipping insertion in model container [2020-10-25 22:01:49,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:43" (2/3) ... [2020-10-25 22:01:49,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57051124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:49, skipping insertion in model container [2020-10-25 22:01:49,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:49" (3/3) ... [2020-10-25 22:01:49,025 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-10-25 22:01:49,039 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:01:49,044 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:01:49,058 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:01:49,088 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:01:49,089 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:01:49,089 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:01:49,089 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:01:49,089 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:01:49,089 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:01:49,089 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:01:49,090 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:01:49,103 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-25 22:01:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-25 22:01:49,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:49,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:49,110 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:49,117 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-10-25 22:01:49,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:49,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729104817] [2020-10-25 22:01:49,131 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 [2020-10-25 22:01:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:49,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-25 22:01:49,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:49,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:49,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729104817] [2020-10-25 22:01:49,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:49,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-25 22:01:49,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830117651] [2020-10-25 22:01:49,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:01:49,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:49,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:01:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:01:49,425 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-25 22:01:49,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:49,445 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-10-25 22:01:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:01:49,446 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-25 22:01:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:49,457 INFO L225 Difference]: With dead ends: 30 [2020-10-25 22:01:49,457 INFO L226 Difference]: Without dead ends: 12 [2020-10-25 22:01:49,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:01:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-25 22:01:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-25 22:01:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-25 22:01:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-25 22:01:49,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-10-25 22:01:49,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:49,503 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-25 22:01:49,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:01:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-25 22:01:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:01:49,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:49,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:49,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 22:01:49,720 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:49,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-10-25 22:01:49,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:49,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265732912] [2020-10-25 22:01:49,723 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 [2020-10-25 22:01:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:50,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 22:01:50,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:50,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:50,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265732912] [2020-10-25 22:01:50,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:50,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-25 22:01:50,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519020025] [2020-10-25 22:01:50,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:50,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:50,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:50,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:50,606 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-10-25 22:01:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:58,050 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-25 22:01:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:58,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-25 22:01:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:58,055 INFO L225 Difference]: With dead ends: 24 [2020-10-25 22:01:58,055 INFO L226 Difference]: Without dead ends: 16 [2020-10-25 22:01:58,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-25 22:01:58,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-25 22:01:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-25 22:01:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-25 22:01:58,062 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-25 22:01:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:58,062 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-25 22:01:58,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-25 22:01:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:01:58,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:58,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:58,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 22:01:58,271 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:58,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-10-25 22:01:58,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:58,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398991036] [2020-10-25 22:01:58,275 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 [2020-10-25 22:01:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:01:59,169 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:02:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:02:00,013 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:02:00,152 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-25 22:02:00,152 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:02:00,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-25 22:02:00,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:02:00 BoogieIcfgContainer [2020-10-25 22:02:00,398 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:02:00,399 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:02:00,399 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:02:00,399 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:02:00,400 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:49" (3/4) ... [2020-10-25 22:02:00,402 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:02:00,456 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:02:00,456 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:02:00,459 INFO L168 Benchmark]: Toolchain (without parser) took 17495.23 ms. Allocated memory is still 50.3 MB. Free memory was 27.9 MB in the beginning and 28.2 MB in the end (delta: -331.7 kB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. [2020-10-25 22:02:00,460 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 39.8 MB. Free memory was 26.7 MB in the beginning and 26.6 MB in the end (delta: 24.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:02:00,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.63 ms. Allocated memory is still 50.3 MB. Free memory was 27.3 MB in the beginning and 30.0 MB in the end (delta: -2.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:02:00,461 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.86 ms. Allocated memory is still 50.3 MB. Free memory was 30.0 MB in the beginning and 28.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:02:00,462 INFO L168 Benchmark]: Boogie Preprocessor took 33.77 ms. Allocated memory is still 50.3 MB. Free memory was 28.4 MB in the beginning and 27.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:02:00,463 INFO L168 Benchmark]: RCFGBuilder took 5565.98 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 29.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-10-25 22:02:00,464 INFO L168 Benchmark]: TraceAbstraction took 11383.66 ms. Allocated memory is still 50.3 MB. Free memory was 28.8 MB in the beginning and 30.6 MB in the end (delta: -1.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:02:00,464 INFO L168 Benchmark]: Witness Printer took 57.83 ms. Allocated memory is still 50.3 MB. Free memory was 30.3 MB in the beginning and 28.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:02:00,469 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 39.8 MB. Free memory was 26.7 MB in the beginning and 26.6 MB in the end (delta: 24.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 396.63 ms. Allocated memory is still 50.3 MB. Free memory was 27.3 MB in the beginning and 30.0 MB in the end (delta: -2.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.86 ms. Allocated memory is still 50.3 MB. Free memory was 30.0 MB in the beginning and 28.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.77 ms. Allocated memory is still 50.3 MB. Free memory was 28.4 MB in the beginning and 27.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 5565.98 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 29.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11383.66 ms. Allocated memory is still 50.3 MB. Free memory was 28.8 MB in the beginning and 30.6 MB in the end (delta: -1.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * Witness Printer took 57.83 ms. Allocated memory is still 50.3 MB. Free memory was 30.3 MB in the beginning and 28.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] float pi = 3.14159 ; VAL [pi=3.141590118408203] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=3.141590118408203] [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=3.141590118408203] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [pi=3.141590118408203] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=3.141590118408203] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=3.141590118408203] [L12] COND TRUE !(cond) VAL [pi=3.141590118408203] [L7] __assert_fail("0", "loop2-1.c", 7, "reach_error") VAL [pi=3.141590118408203] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 2 SDslu, 7 SDs, 0 SdLazy, 5 SolverSat, 1 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 6.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 438 SizeOfPredicates, 1 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...