./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 a4ecdabc 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/loop1-2.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 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/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/loop1-2.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 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-a4ecdab [2020-10-24 23:27:31,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:27:31,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:27:31,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:27:31,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:27:31,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:27:31,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:27:31,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:27:31,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:27:31,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:27:31,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:27:31,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:27:31,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:27:31,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:27:31,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:27:31,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:27:31,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:27:31,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:27:31,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:27:31,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:27:31,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:27:31,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:27:31,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:27:31,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:27:31,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:27:31,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:27:31,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:27:31,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:27:31,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:27:31,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:27:31,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:27:31,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:27:31,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:27:31,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:27:31,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:27:31,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:27:31,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:27:31,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:27:31,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:27:31,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:27:31,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:27:31,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 23:27:31,548 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:27:31,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:27:31,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:27:31,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:27:31,550 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:27:31,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:27:31,550 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:27:31,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 23:27:31,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:27:31,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:27:31,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:27:31,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:27:31,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:27:31,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:27:31,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:27:31,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:27:31,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:27:31,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:27:31,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:27:31,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:27:31,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:27:31,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:27:31,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:27:31,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:27:31,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:27:31,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 23:27:31,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 23:27:31,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:27:31,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:27:31,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-10-24 23:27:31,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:27:32,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:27:32,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:27:32,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:27:32,022 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:27:32,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-10-24 23:27:32,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56deb45f8/d656c056e11b4d97970c7fdd6f9bb6ec/FLAGbed149838 [2020-10-24 23:27:32,757 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:27:32,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-10-24 23:27:32,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56deb45f8/d656c056e11b4d97970c7fdd6f9bb6ec/FLAGbed149838 [2020-10-24 23:27:33,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56deb45f8/d656c056e11b4d97970c7fdd6f9bb6ec [2020-10-24 23:27:33,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:27:33,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:27:33,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:33,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:27:33,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:27:33,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c0bb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33, skipping insertion in model container [2020-10-24 23:27:33,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:27:33,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:27:33,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:33,407 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:27:33,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:33,444 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:27:33,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33 WrapperNode [2020-10-24 23:27:33,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:33,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:33,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:27:33,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:27:33,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:33,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:27:33,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:27:33,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:27:33,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (1/1) ... [2020-10-24 23:27:33,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:27:33,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:27:33,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:27:33,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:27:33,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (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 [2020-10-24 23:27:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 23:27:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:27:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:27:33,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:27:34,016 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:27:34,016 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-24 23:27:34,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:34 BoogieIcfgContainer [2020-10-24 23:27:34,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:27:34,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:27:34,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:27:34,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:27:34,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:27:33" (1/3) ... [2020-10-24 23:27:34,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c002390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:34, skipping insertion in model container [2020-10-24 23:27:34,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:33" (2/3) ... [2020-10-24 23:27:34,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c002390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:34, skipping insertion in model container [2020-10-24 23:27:34,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:34" (3/3) ... [2020-10-24 23:27:34,029 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-10-24 23:27:34,044 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:27:34,049 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:27:34,068 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:27:34,100 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:27:34,100 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:27:34,100 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:27:34,100 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:27:34,101 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:27:34,101 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:27:34,101 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:27:34,101 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:27:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-24 23:27:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 23:27:34,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:34,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 23:27:34,135 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:34,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:34,149 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-10-24 23:27:34,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:34,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866113816] [2020-10-24 23:27:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:34,338 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 23:27:34,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866113816] [2020-10-24 23:27:34,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:34,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 23:27:34,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695563827] [2020-10-24 23:27:34,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:27:34,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:27:34,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:34,364 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-24 23:27:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:34,382 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-24 23:27:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:27:34,383 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 23:27:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:34,393 INFO L225 Difference]: With dead ends: 21 [2020-10-24 23:27:34,394 INFO L226 Difference]: Without dead ends: 8 [2020-10-24 23:27:34,397 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 23:27:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-24 23:27:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-24 23:27:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-24 23:27:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-10-24 23:27:34,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-10-24 23:27:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:34,434 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-10-24 23:27:34,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:27:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-10-24 23:27:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-24 23:27:34,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:34,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:34,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 23:27:34,436 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:34,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-10-24 23:27:34,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:34,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453969454] [2020-10-24 23:27:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:34,494 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:34,546 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:34,582 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 23:27:34,582 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:27:34,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 23:27:34,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:27:34 BoogieIcfgContainer [2020-10-24 23:27:34,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:27:34,612 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:27:34,612 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:27:34,612 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:27:34,613 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:34" (3/4) ... [2020-10-24 23:27:34,617 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 23:27:34,617 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:27:34,620 INFO L168 Benchmark]: Toolchain (without parser) took 1499.60 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 22.1 MB in the beginning and 27.5 MB in the end (delta: -5.4 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:34,621 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 44.0 MB. Free memory was 24.8 MB in the beginning and 24.8 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:34,622 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.97 ms. Allocated memory is still 44.0 MB. Free memory was 21.4 MB in the beginning and 21.1 MB in the end (delta: 293.7 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:34,623 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.91 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 19.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:34,624 INFO L168 Benchmark]: Boogie Preprocessor took 26.45 ms. Allocated memory is still 44.0 MB. Free memory was 19.7 MB in the beginning and 18.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:34,626 INFO L168 Benchmark]: RCFGBuilder took 504.22 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 18.5 MB in the beginning and 30.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:34,627 INFO L168 Benchmark]: TraceAbstraction took 590.49 ms. Allocated memory is still 54.5 MB. Free memory was 29.6 MB in the beginning and 27.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:34,628 INFO L168 Benchmark]: Witness Printer took 5.53 ms. Allocated memory is still 54.5 MB. Free memory was 27.8 MB in the beginning and 27.5 MB in the end (delta: 284.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:34,634 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 44.0 MB. Free memory was 24.8 MB in the beginning and 24.8 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.97 ms. Allocated memory is still 44.0 MB. Free memory was 21.4 MB in the beginning and 21.1 MB in the end (delta: 293.7 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.91 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 19.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.45 ms. Allocated memory is still 44.0 MB. Free memory was 19.7 MB in the beginning and 18.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 504.22 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 18.5 MB in the beginning and 30.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 590.49 ms. Allocated memory is still 54.5 MB. Free memory was 29.6 MB in the beginning and 27.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.2 MB. Max. memory is 16.1 GB. * Witness Printer took 5.53 ms. Allocated memory is still 54.5 MB. Free memory was 27.8 MB in the beginning and 27.5 MB in the end (delta: 284.4 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 someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 29. 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-a4ecdab [2020-10-24 23:27:37,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:27:37,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:27:37,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:27:37,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:27:37,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:27:37,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:27:37,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:27:37,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:27:37,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:27:37,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:27:37,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:27:37,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:27:37,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:27:37,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:27:37,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:27:37,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:27:37,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:27:37,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:27:37,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:27:37,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:27:37,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:27:37,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:27:37,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:27:37,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:27:37,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:27:37,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:27:37,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:27:37,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:27:37,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:27:37,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:27:37,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:27:37,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:27:37,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:27:37,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:27:37,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:27:37,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:27:37,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:27:37,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:27:37,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:27:37,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:27:37,360 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 23:27:37,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:27:37,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:27:37,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:27:37,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:27:37,432 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:27:37,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:27:37,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:27:37,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:27:37,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:27:37,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:27:37,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:27:37,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:27:37,434 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 23:27:37,434 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 23:27:37,435 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:27:37,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:27:37,435 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:27:37,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:27:37,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:27:37,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:27:37,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:27:37,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:27:37,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:27:37,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:27:37,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:27:37,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:27:37,438 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 23:27:37,438 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 23:27:37,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:27:37,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:27:37,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 23:27:37,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-10-24 23:27:37,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:27:37,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:27:37,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:27:37,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:27:37,884 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:27:37,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-10-24 23:27:37,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/443e7aeff/3c164ebde7884b0686fb731e813a3b4e/FLAG58da8f91c [2020-10-24 23:27:38,612 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:27:38,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-10-24 23:27:38,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/443e7aeff/3c164ebde7884b0686fb731e813a3b4e/FLAG58da8f91c [2020-10-24 23:27:38,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/443e7aeff/3c164ebde7884b0686fb731e813a3b4e [2020-10-24 23:27:38,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:27:39,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:27:39,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:39,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:27:39,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:27:39,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:38" (1/1) ... [2020-10-24 23:27:39,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29659f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39, skipping insertion in model container [2020-10-24 23:27:39,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:38" (1/1) ... [2020-10-24 23:27:39,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:27:39,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:27:39,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:39,289 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:27:39,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:39,375 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:27:39,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39 WrapperNode [2020-10-24 23:27:39,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:39,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:39,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:27:39,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:27:39,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (1/1) ... [2020-10-24 23:27:39,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (1/1) ... [2020-10-24 23:27:39,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:39,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:27:39,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:27:39,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:27:39,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (1/1) ... [2020-10-24 23:27:39,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (1/1) ... [2020-10-24 23:27:39,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (1/1) ... [2020-10-24 23:27:39,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (1/1) ... [2020-10-24 23:27:39,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (1/1) ... [2020-10-24 23:27:39,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (1/1) ... [2020-10-24 23:27:39,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (1/1) ... [2020-10-24 23:27:39,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:27:39,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:27:39,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:27:39,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:27:39,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (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 [2020-10-24 23:27:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 23:27:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:27:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:27:39,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:27:43,394 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:27:43,395 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-24 23:27:43,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:43 BoogieIcfgContainer [2020-10-24 23:27:43,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:27:43,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:27:43,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:27:43,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:27:43,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:27:38" (1/3) ... [2020-10-24 23:27:43,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6634f6c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:43, skipping insertion in model container [2020-10-24 23:27:43,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:39" (2/3) ... [2020-10-24 23:27:43,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6634f6c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:43, skipping insertion in model container [2020-10-24 23:27:43,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:43" (3/3) ... [2020-10-24 23:27:43,415 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-10-24 23:27:43,429 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:27:43,434 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:27:43,449 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:27:43,484 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:27:43,484 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:27:43,484 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:27:43,485 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:27:43,485 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:27:43,485 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:27:43,485 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:27:43,485 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:27:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-24 23:27:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 23:27:43,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:43,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 23:27:43,533 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:43,544 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-10-24 23:27:43,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:43,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266972499] [2020-10-24 23:27:43,561 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 [2020-10-24 23:27:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 23:27:43,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:44,001 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 23:27:44,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:44,005 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 23:27:44,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266972499] [2020-10-24 23:27:44,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:44,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 23:27:44,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791291682] [2020-10-24 23:27:44,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:27:44,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:44,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:27:44,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:44,032 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-24 23:27:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:44,053 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-24 23:27:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:27:44,054 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 23:27:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:44,064 INFO L225 Difference]: With dead ends: 21 [2020-10-24 23:27:44,064 INFO L226 Difference]: Without dead ends: 8 [2020-10-24 23:27:44,068 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 23:27:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-24 23:27:44,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-24 23:27:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-24 23:27:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-10-24 23:27:44,113 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-10-24 23:27:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:44,113 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-10-24 23:27:44,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:27:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-10-24 23:27:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-24 23:27:44,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:44,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:44,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 23:27:44,329 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-10-24 23:27:44,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:44,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762237323] [2020-10-24 23:27:44,344 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 [2020-10-24 23:27:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:44,964 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:45,588 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:45,657 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-24 23:27:45,657 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:27:45,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 23:27:45,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:27:45 BoogieIcfgContainer [2020-10-24 23:27:45,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:27:45,902 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:27:45,902 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:27:45,902 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:27:45,903 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:43" (3/4) ... [2020-10-24 23:27:45,905 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-24 23:27:45,950 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 23:27:45,950 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:27:45,953 INFO L168 Benchmark]: Toolchain (without parser) took 6951.86 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 34.0 MB in the beginning and 41.6 MB in the end (delta: -7.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:45,953 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:45,954 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.79 ms. Allocated memory is still 56.6 MB. Free memory was 33.5 MB in the beginning and 40.4 MB in the end (delta: -6.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:45,955 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.42 ms. Allocated memory is still 56.6 MB. Free memory was 40.4 MB in the beginning and 39.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:45,956 INFO L168 Benchmark]: Boogie Preprocessor took 31.99 ms. Allocated memory is still 56.6 MB. Free memory was 39.0 MB in the beginning and 37.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:45,957 INFO L168 Benchmark]: RCFGBuilder took 3943.79 ms. Allocated memory is still 56.6 MB. Free memory was 37.7 MB in the beginning and 26.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:45,958 INFO L168 Benchmark]: TraceAbstraction took 2502.00 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 25.6 MB in the beginning and 43.7 MB in the end (delta: -18.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:45,959 INFO L168 Benchmark]: Witness Printer took 48.28 ms. Allocated memory is still 69.2 MB. Free memory was 43.7 MB in the beginning and 41.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:45,964 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 56.6 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 363.79 ms. Allocated memory is still 56.6 MB. Free memory was 33.5 MB in the beginning and 40.4 MB in the end (delta: -6.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.42 ms. Allocated memory is still 56.6 MB. Free memory was 40.4 MB in the beginning and 39.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.99 ms. Allocated memory is still 56.6 MB. Free memory was 39.0 MB in the beginning and 37.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3943.79 ms. Allocated memory is still 56.6 MB. Free memory was 37.7 MB in the beginning and 26.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2502.00 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 25.6 MB in the beginning and 43.7 MB in the end (delta: -18.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 48.28 ms. Allocated memory is still 69.2 MB. Free memory was 43.7 MB in the beginning and 41.6 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: 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] 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: 2.3s, 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, 0.9s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 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...