./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/inv_square-2.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/float-benchs/inv_square-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 052b65435ce93a43ae641d125fc7546191d1b08e ........................................................................................................................................................................................................................................................................... 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/float-benchs/inv_square-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 052b65435ce93a43ae641d125fc7546191d1b08e ...................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 21:39:54,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 21:39:54,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 21:39:54,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 21:39:54,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 21:39:54,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 21:39:54,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 21:39:54,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 21:39:54,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 21:39:54,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 21:39:54,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 21:39:54,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 21:39:54,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 21:39:54,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 21:39:54,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 21:39:54,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 21:39:54,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 21:39:54,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 21:39:54,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 21:39:54,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 21:39:54,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 21:39:54,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 21:39:54,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 21:39:54,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 21:39:54,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 21:39:54,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 21:39:54,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 21:39:54,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 21:39:54,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 21:39:54,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 21:39:54,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 21:39:54,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 21:39:54,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 21:39:54,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 21:39:54,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 21:39:54,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 21:39:54,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 21:39:54,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 21:39:54,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 21:39:54,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 21:39:54,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 21:39:54,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 21:39:54,320 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 21:39:54,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 21:39:54,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 21:39:54,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 21:39:54,326 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 21:39:54,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 21:39:54,327 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 21:39:54,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 21:39:54,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 21:39:54,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 21:39:54,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 21:39:54,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 21:39:54,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 21:39:54,329 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 21:39:54,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 21:39:54,329 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 21:39:54,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 21:39:54,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 21:39:54,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 21:39:54,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 21:39:54,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 21:39:54,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:39:54,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 21:39:54,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 21:39:54,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 21:39:54,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 21:39:54,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 21:39:54,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 21:39:54,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 21:39:54,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2020-10-25 21:39:54,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 21:39:54,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 21:39:54,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 21:39:54,774 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 21:39:54,776 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 21:39:54,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-2.c [2020-10-25 21:39:54,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5b68991/3a38c9f90462460585b3c25a3f944839/FLAGcebc11485 [2020-10-25 21:39:55,565 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 21:39:55,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c [2020-10-25 21:39:55,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5b68991/3a38c9f90462460585b3c25a3f944839/FLAGcebc11485 [2020-10-25 21:39:55,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5b68991/3a38c9f90462460585b3c25a3f944839 [2020-10-25 21:39:55,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 21:39:55,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 21:39:55,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 21:39:55,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 21:39:55,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 21:39:55,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:39:55" (1/1) ... [2020-10-25 21:39:55,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71548370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:55, skipping insertion in model container [2020-10-25 21:39:55,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:39:55" (1/1) ... [2020-10-25 21:39:55,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 21:39:55,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 21:39:56,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:39:56,207 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 21:39:56,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:39:56,244 INFO L208 MainTranslator]: Completed translation [2020-10-25 21:39:56,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56 WrapperNode [2020-10-25 21:39:56,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 21:39:56,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 21:39:56,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 21:39:56,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 21:39:56,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (1/1) ... [2020-10-25 21:39:56,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (1/1) ... [2020-10-25 21:39:56,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 21:39:56,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 21:39:56,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 21:39:56,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 21:39:56,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (1/1) ... [2020-10-25 21:39:56,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (1/1) ... [2020-10-25 21:39:56,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (1/1) ... [2020-10-25 21:39:56,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (1/1) ... [2020-10-25 21:39:56,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (1/1) ... [2020-10-25 21:39:56,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (1/1) ... [2020-10-25 21:39:56,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (1/1) ... [2020-10-25 21:39:56,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 21:39:56,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 21:39:56,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 21:39:56,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 21:39:56,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (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 21:39:56,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 21:39:56,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 21:39:56,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 21:39:56,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 21:39:56,686 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 21:39:56,686 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-25 21:39:56,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:39:56 BoogieIcfgContainer [2020-10-25 21:39:56,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 21:39:56,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 21:39:56,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 21:39:56,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 21:39:56,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 09:39:55" (1/3) ... [2020-10-25 21:39:56,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a26c46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:39:56, skipping insertion in model container [2020-10-25 21:39:56,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:39:56" (2/3) ... [2020-10-25 21:39:56,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a26c46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:39:56, skipping insertion in model container [2020-10-25 21:39:56,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:39:56" (3/3) ... [2020-10-25 21:39:56,701 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2020-10-25 21:39:56,716 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 21:39:56,721 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 21:39:56,742 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 21:39:56,820 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 21:39:56,821 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 21:39:56,821 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 21:39:56,822 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 21:39:56,822 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 21:39:56,823 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 21:39:56,823 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 21:39:56,825 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 21:39:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-25 21:39:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 21:39:56,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:39:56,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 21:39:56,881 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:39:56,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:39:56,889 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-10-25 21:39:56,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:39:56,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116695350] [2020-10-25 21:39:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:39:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:39:57,147 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 21:39:57,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116695350] [2020-10-25 21:39:57,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:39:57,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 21:39:57,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205290053] [2020-10-25 21:39:57,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 21:39:57,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 21:39:57,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 21:39:57,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:39:57,188 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-25 21:39:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:39:57,210 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-10-25 21:39:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 21:39:57,213 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-25 21:39:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:39:57,224 INFO L225 Difference]: With dead ends: 22 [2020-10-25 21:39:57,225 INFO L226 Difference]: Without dead ends: 7 [2020-10-25 21:39:57,232 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 21:39:57,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-25 21:39:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-25 21:39:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-25 21:39:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-25 21:39:57,277 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-25 21:39:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:39:57,277 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-25 21:39:57,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 21:39:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-25 21:39:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 21:39:57,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:39:57,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 21:39:57,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 21:39:57,281 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:39:57,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:39:57,286 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-10-25 21:39:57,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:39:57,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873609477] [2020-10-25 21:39:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:39:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:39:57,357 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:39:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:39:57,406 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:39:57,448 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 21:39:57,449 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 21:39:57,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 21:39:57,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 09:39:57 BoogieIcfgContainer [2020-10-25 21:39:57,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 21:39:57,488 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 21:39:57,489 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 21:39:57,489 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 21:39:57,490 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:39:56" (3/4) ... [2020-10-25 21:39:57,494 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 21:39:57,495 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 21:39:57,501 INFO L168 Benchmark]: Toolchain (without parser) took 1592.98 ms. Allocated memory is still 52.4 MB. Free memory was 29.7 MB in the beginning and 24.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-10-25 21:39:57,502 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 41.9 MB. Free memory was 19.9 MB in the beginning and 19.8 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:39:57,506 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.74 ms. Allocated memory is still 52.4 MB. Free memory was 29.2 MB in the beginning and 30.7 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 21:39:57,508 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.71 ms. Allocated memory is still 52.4 MB. Free memory was 30.7 MB in the beginning and 29.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:39:57,510 INFO L168 Benchmark]: Boogie Preprocessor took 24.35 ms. Allocated memory is still 52.4 MB. Free memory was 29.3 MB in the beginning and 28.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:39:57,511 INFO L168 Benchmark]: RCFGBuilder took 374.97 ms. Allocated memory is still 52.4 MB. Free memory was 28.2 MB in the beginning and 30.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2020-10-25 21:39:57,514 INFO L168 Benchmark]: TraceAbstraction took 796.40 ms. Allocated memory is still 52.4 MB. Free memory was 30.5 MB in the beginning and 24.9 MB in the end (delta: 5.5 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-25 21:39:57,515 INFO L168 Benchmark]: Witness Printer took 7.17 ms. Allocated memory is still 52.4 MB. Free memory was 24.9 MB in the beginning and 24.7 MB in the end (delta: 238.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:39:57,533 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 41.9 MB. Free memory was 19.9 MB in the beginning and 19.8 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.74 ms. Allocated memory is still 52.4 MB. Free memory was 29.2 MB in the beginning and 30.7 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.71 ms. Allocated memory is still 52.4 MB. Free memory was 30.7 MB in the beginning and 29.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.35 ms. Allocated memory is still 52.4 MB. Free memory was 29.3 MB in the beginning and 28.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 374.97 ms. Allocated memory is still 52.4 MB. Free memory was 28.2 MB in the beginning and 30.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 796.40 ms. Allocated memory is still 52.4 MB. Free memory was 30.5 MB in the beginning and 24.9 MB in the end (delta: 5.5 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Witness Printer took 7.17 ms. Allocated memory is still 52.4 MB. Free memory was 24.9 MB in the beginning and 24.7 MB in the end (delta: 238.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x <= -1e-20f || x >= 1e-20f [L23] y = x * x [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_square-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 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 0.2.0-5485861 [2020-10-25 21:40:00,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 21:40:00,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 21:40:00,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 21:40:00,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 21:40:00,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 21:40:00,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 21:40:00,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 21:40:00,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 21:40:00,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 21:40:00,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 21:40:00,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 21:40:00,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 21:40:00,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 21:40:00,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 21:40:00,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 21:40:00,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 21:40:00,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 21:40:00,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 21:40:00,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 21:40:00,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 21:40:00,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 21:40:00,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 21:40:00,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 21:40:00,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 21:40:00,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 21:40:00,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 21:40:00,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 21:40:00,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 21:40:00,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 21:40:00,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 21:40:00,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 21:40:00,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 21:40:00,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 21:40:00,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 21:40:00,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 21:40:00,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 21:40:00,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 21:40:00,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 21:40:00,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 21:40:00,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 21:40:00,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 21:40:00,319 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 21:40:00,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 21:40:00,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 21:40:00,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 21:40:00,323 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 21:40:00,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 21:40:00,324 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 21:40:00,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 21:40:00,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 21:40:00,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 21:40:00,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 21:40:00,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 21:40:00,326 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 21:40:00,326 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 21:40:00,327 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 21:40:00,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 21:40:00,327 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 21:40:00,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 21:40:00,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 21:40:00,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 21:40:00,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 21:40:00,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 21:40:00,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:40:00,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 21:40:00,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 21:40:00,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 21:40:00,330 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 21:40:00,330 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 21:40:00,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 21:40:00,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 21:40:00,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 21:40:00,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2020-10-25 21:40:00,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 21:40:00,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 21:40:00,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 21:40:00,854 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 21:40:00,855 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 21:40:00,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-2.c [2020-10-25 21:40:00,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad9b7fd6/e5b44b9bded447c38f53bb1597b16e51/FLAGdb9b6cbec [2020-10-25 21:40:01,713 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 21:40:01,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c [2020-10-25 21:40:01,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad9b7fd6/e5b44b9bded447c38f53bb1597b16e51/FLAGdb9b6cbec [2020-10-25 21:40:02,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad9b7fd6/e5b44b9bded447c38f53bb1597b16e51 [2020-10-25 21:40:02,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 21:40:02,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 21:40:02,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 21:40:02,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 21:40:02,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 21:40:02,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37475e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02, skipping insertion in model container [2020-10-25 21:40:02,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 21:40:02,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 21:40:02,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:40:02,468 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 21:40:02,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:40:02,524 INFO L208 MainTranslator]: Completed translation [2020-10-25 21:40:02,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02 WrapperNode [2020-10-25 21:40:02,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 21:40:02,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 21:40:02,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 21:40:02,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 21:40:02,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 21:40:02,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 21:40:02,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 21:40:02,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 21:40:02,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (1/1) ... [2020-10-25 21:40:02,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 21:40:02,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 21:40:02,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 21:40:02,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 21:40:02,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (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 21:40:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 21:40:02,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 21:40:02,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 21:40:02,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 21:40:04,459 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 21:40:04,466 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-25 21:40:04,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:40:04 BoogieIcfgContainer [2020-10-25 21:40:04,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 21:40:04,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 21:40:04,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 21:40:04,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 21:40:04,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 09:40:02" (1/3) ... [2020-10-25 21:40:04,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d3a34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:40:04, skipping insertion in model container [2020-10-25 21:40:04,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:40:02" (2/3) ... [2020-10-25 21:40:04,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d3a34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:40:04, skipping insertion in model container [2020-10-25 21:40:04,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:40:04" (3/3) ... [2020-10-25 21:40:04,497 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2020-10-25 21:40:04,529 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 21:40:04,550 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 21:40:04,567 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 21:40:04,597 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 21:40:04,598 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 21:40:04,598 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 21:40:04,598 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 21:40:04,598 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 21:40:04,599 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 21:40:04,599 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 21:40:04,599 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 21:40:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-25 21:40:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 21:40:04,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:40:04,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 21:40:04,621 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:40:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:40:04,628 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-10-25 21:40:04,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:40:04,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528237272] [2020-10-25 21:40:04,654 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 21:40:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:40:04,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-25 21:40:04,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 21:40:04,848 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 21:40:04,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 21:40:04,852 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 21:40:04,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528237272] [2020-10-25 21:40:04,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:40:04,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-25 21:40:04,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18801889] [2020-10-25 21:40:04,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 21:40:04,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 21:40:04,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 21:40:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:40:04,897 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-25 21:40:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:40:04,918 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-10-25 21:40:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 21:40:04,920 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-25 21:40:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:40:04,936 INFO L225 Difference]: With dead ends: 22 [2020-10-25 21:40:04,937 INFO L226 Difference]: Without dead ends: 7 [2020-10-25 21:40:04,940 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 [2020-10-25 21:40:04,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-25 21:40:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-25 21:40:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-25 21:40:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-25 21:40:04,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-25 21:40:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:40:04,981 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-25 21:40:04,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 21:40:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-25 21:40:04,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 21:40:04,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:40:04,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 21:40:05,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 21:40:05,197 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:40:05,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:40:05,199 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-10-25 21:40:05,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:40:05,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592522812] [2020-10-25 21:40:05,200 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 21:40:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:40:05,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 21:40:05,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 21:40:05,453 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-25 21:40:05,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 21:40:05,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-25 21:40:05,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-25 21:40:07,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-25 21:40:07,542 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 21:40:07,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 21:40:09,192 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 21:40:09,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592522812] [2020-10-25 21:40:09,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:40:09,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [] total 7 [2020-10-25 21:40:09,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176383373] [2020-10-25 21:40:09,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 21:40:09,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 21:40:09,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 21:40:09,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-25 21:40:09,198 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 7 states. [2020-10-25 21:40:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:40:09,587 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-10-25 21:40:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 21:40:09,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2020-10-25 21:40:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:40:09,588 INFO L225 Difference]: With dead ends: 7 [2020-10-25 21:40:09,588 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 21:40:09,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-25 21:40:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 21:40:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 21:40:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 21:40:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 21:40:09,591 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-10-25 21:40:09,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:40:09,592 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 21:40:09,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 21:40:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 21:40:09,592 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 21:40:09,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 21:40:09,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 21:40:09,850 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 21:40:09,850 INFO L277 CegarLoopResult]: At program point L27(lines 15 28) the Hoare annotation is: true [2020-10-25 21:40:09,850 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-10-25 21:40:09,850 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-10-25 21:40:09,850 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-10-25 21:40:09,851 INFO L277 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2020-10-25 21:40:09,851 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-25 21:40:09,851 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 21:40:09,851 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 21:40:09,851 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 21:40:09,851 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-25 21:40:09,852 INFO L274 CegarLoopResult]: For program point L22-1(lines 22 26) no Hoare annotation was computed. [2020-10-25 21:40:09,852 INFO L274 CegarLoopResult]: For program point L10(lines 22 26) no Hoare annotation was computed. [2020-10-25 21:40:09,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 09:40:09 BoogieIcfgContainer [2020-10-25 21:40:09,860 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 21:40:09,861 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 21:40:09,861 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 21:40:09,861 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 21:40:09,862 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:40:04" (3/4) ... [2020-10-25 21:40:09,865 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 21:40:09,876 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-25 21:40:09,877 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 21:40:09,877 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-25 21:40:09,877 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 21:40:09,917 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 21:40:09,918 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 21:40:09,920 INFO L168 Benchmark]: Toolchain (without parser) took 7817.97 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 20.2 MB in the beginning and 25.7 MB in the end (delta: -5.5 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2020-10-25 21:40:09,921 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 41.9 MB. Free memory was 22.7 MB in the beginning and 22.6 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:40:09,922 INFO L168 Benchmark]: CACSL2BoogieTranslator took 413.31 ms. Allocated memory is still 41.9 MB. Free memory was 19.6 MB in the beginning and 21.0 MB in the end (delta: -1.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-10-25 21:40:09,923 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.88 ms. Allocated memory is still 41.9 MB. Free memory was 21.0 MB in the beginning and 19.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:40:09,923 INFO L168 Benchmark]: Boogie Preprocessor took 61.96 ms. Allocated memory is still 41.9 MB. Free memory was 19.6 MB in the beginning and 18.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:40:09,924 INFO L168 Benchmark]: RCFGBuilder took 1811.96 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 18.3 MB in the beginning and 24.7 MB in the end (delta: -6.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 21:40:09,925 INFO L168 Benchmark]: TraceAbstraction took 5381.13 ms. Allocated memory is still 50.3 MB. Free memory was 24.4 MB in the beginning and 28.2 MB in the end (delta: -3.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:40:09,925 INFO L168 Benchmark]: Witness Printer took 56.95 ms. Allocated memory is still 50.3 MB. Free memory was 28.2 MB in the beginning and 25.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-10-25 21:40:09,930 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 41.9 MB. Free memory was 22.7 MB in the beginning and 22.6 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 413.31 ms. Allocated memory is still 41.9 MB. Free memory was 19.6 MB in the beginning and 21.0 MB in the end (delta: -1.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.88 ms. Allocated memory is still 41.9 MB. Free memory was 21.0 MB in the beginning and 19.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.96 ms. Allocated memory is still 41.9 MB. Free memory was 19.6 MB in the beginning and 18.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1811.96 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 18.3 MB in the beginning and 24.7 MB in the end (delta: -6.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5381.13 ms. Allocated memory is still 50.3 MB. Free memory was 24.4 MB in the beginning and 28.2 MB in the end (delta: -3.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 56.95 ms. Allocated memory is still 50.3 MB. Free memory was 28.2 MB in the beginning and 25.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 6 SDslu, 2 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 SizeOfPredicates, 7 NumberOfNonLiveVariables, 64 ConjunctsInSsa, 10 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 correct! Received shutdown request...