./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/inv_square_int.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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_int.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 ba8acdf434ba605da81b4b94488025a77c80baa5 ...................................................................................................................................................................................................................................................................... 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_1.3.100.v20150511-1540.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_int.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 ba8acdf434ba605da81b4b94488025a77c80baa5 ........................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:20:14,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:20:14,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:20:14,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:20:14,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:20:14,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:20:14,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:20:14,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:20:14,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:20:14,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:20:14,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:20:14,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:20:14,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:20:14,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:20:14,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:20:14,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:20:14,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:20:14,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:20:14,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:20:14,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:20:14,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:20:14,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:20:14,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:20:14,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:20:14,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:20:14,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:20:14,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:20:14,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:20:14,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:20:14,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:20:14,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:20:14,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:20:14,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:20:14,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:20:14,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:20:14,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:20:14,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:20:14,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:20:14,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:20:14,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:20:14,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:20:14,169 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:20:14,211 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:20:14,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:20:14,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:20:14,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:20:14,214 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:20:14,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:20:14,214 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:20:14,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:20:14,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:20:14,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:20:14,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:20:14,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:20:14,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:20:14,217 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:20:14,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:20:14,218 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:20:14,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:20:14,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:20:14,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:20:14,220 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:20:14,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:20:14,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:20:14,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:20:14,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:20:14,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:20:14,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:20:14,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:20:14,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:20:14,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:20:14,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2020-10-20 00:20:14,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:20:14,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:20:14,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:20:14,455 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:20:14,455 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:20:14,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square_int.c [2020-10-20 00:20:14,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77d43bb52/3469d07252324627a44c7414240ada46/FLAG494899f36 [2020-10-20 00:20:14,924 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:20:14,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square_int.c [2020-10-20 00:20:14,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77d43bb52/3469d07252324627a44c7414240ada46/FLAG494899f36 [2020-10-20 00:20:15,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77d43bb52/3469d07252324627a44c7414240ada46 [2020-10-20 00:20:15,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:20:15,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:20:15,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:20:15,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:20:15,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:20:15,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@322af429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15, skipping insertion in model container [2020-10-20 00:20:15,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:20:15,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:20:15,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:20:15,668 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:20:15,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:20:15,702 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:20:15,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15 WrapperNode [2020-10-20 00:20:15,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:20:15,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:20:15,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:20:15,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:20:15,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:20:15,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:20:15,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:20:15,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:20:15,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (1/1) ... [2020-10-20 00:20:15,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:20:15,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:20:15,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:20:15,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:20:15,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (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 [2020-10-20 00:20:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:20:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:20:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:20:15,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:20:16,071 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:20:16,071 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-20 00:20:16,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:16 BoogieIcfgContainer [2020-10-20 00:20:16,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:20:16,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:20:16,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:20:16,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:20:16,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:20:15" (1/3) ... [2020-10-20 00:20:16,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aba9fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:20:16, skipping insertion in model container [2020-10-20 00:20:16,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:15" (2/3) ... [2020-10-20 00:20:16,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aba9fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:20:16, skipping insertion in model container [2020-10-20 00:20:16,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:16" (3/3) ... [2020-10-20 00:20:16,084 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-10-20 00:20:16,099 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:20:16,111 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:20:16,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:20:16,208 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:20:16,211 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:20:16,214 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:20:16,214 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:20:16,215 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:20:16,215 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:20:16,215 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:20:16,215 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:20:16,239 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-20 00:20:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:20:16,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:20:16,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:20:16,246 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:20:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:20:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-20 00:20:16,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:20:16,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531348260] [2020-10-20 00:20:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:20:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:20:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:20:16,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531348260] [2020-10-20 00:20:16,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:20:16,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:20:16,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302928752] [2020-10-20 00:20:16,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:20:16,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:20:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:20:16,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:20:16,417 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-20 00:20:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:20:16,432 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-20 00:20:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:20:16,434 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-20 00:20:16,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:20:16,444 INFO L225 Difference]: With dead ends: 20 [2020-10-20 00:20:16,444 INFO L226 Difference]: Without dead ends: 7 [2020-10-20 00:20:16,448 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 [2020-10-20 00:20:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-20 00:20:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-20 00:20:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 00:20:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-20 00:20:16,483 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-20 00:20:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:20:16,484 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-20 00:20:16,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:20:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-20 00:20:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:20:16,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:20:16,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:20:16,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:20:16,487 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:20:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:20:16,488 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-20 00:20:16,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:20:16,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542061182] [2020-10-20 00:20:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:20:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:20:16,548 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:20:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:20:16,586 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:20:16,620 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:20:16,621 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:20:16,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:20:16,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:20:16 BoogieIcfgContainer [2020-10-20 00:20:16,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:20:16,649 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:20:16,649 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:20:16,649 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:20:16,650 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:16" (3/4) ... [2020-10-20 00:20:16,654 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:20:16,655 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:20:16,658 INFO L168 Benchmark]: Toolchain (without parser) took 1357.31 ms. Allocated memory was 38.3 MB in the beginning and 52.4 MB in the end (delta: 14.2 MB). Free memory was 16.5 MB in the beginning and 28.1 MB in the end (delta: -11.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:16,659 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 36.7 MB. Free memory is still 18.6 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:20:16,660 INFO L168 Benchmark]: CACSL2BoogieTranslator took 398.65 ms. Allocated memory was 38.3 MB in the beginning and 49.3 MB in the end (delta: 11.0 MB). Free memory was 15.7 MB in the beginning and 31.1 MB in the end (delta: -15.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:16,661 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.30 ms. Allocated memory is still 49.3 MB. Free memory was 31.1 MB in the beginning and 29.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:16,662 INFO L168 Benchmark]: Boogie Preprocessor took 24.38 ms. Allocated memory is still 49.3 MB. Free memory was 29.5 MB in the beginning and 28.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:16,663 INFO L168 Benchmark]: RCFGBuilder took 304.06 ms. Allocated memory is still 49.3 MB. Free memory was 28.2 MB in the beginning and 16.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:16,664 INFO L168 Benchmark]: TraceAbstraction took 572.84 ms. Allocated memory was 49.3 MB in the beginning and 52.4 MB in the end (delta: 3.1 MB). Free memory was 16.3 MB in the beginning and 28.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:16,665 INFO L168 Benchmark]: Witness Printer took 6.50 ms. Allocated memory is still 52.4 MB. Free memory was 28.4 MB in the beginning and 28.1 MB in the end (delta: 345.2 kB). Peak memory consumption was 345.2 kB. Max. memory is 14.3 GB. [2020-10-20 00:20:16,671 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 36.7 MB. Free memory is still 18.6 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 398.65 ms. Allocated memory was 38.3 MB in the beginning and 49.3 MB in the end (delta: 11.0 MB). Free memory was 15.7 MB in the beginning and 31.1 MB in the end (delta: -15.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 41.30 ms. Allocated memory is still 49.3 MB. Free memory was 31.1 MB in the beginning and 29.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 24.38 ms. Allocated memory is still 49.3 MB. Free memory was 29.5 MB in the beginning and 28.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 304.06 ms. Allocated memory is still 49.3 MB. Free memory was 28.2 MB in the beginning and 16.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 572.84 ms. Allocated memory was 49.3 MB in the beginning and 52.4 MB in the end (delta: 3.1 MB). Free memory was 16.3 MB in the beginning and 28.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. * Witness Printer took 6.50 ms. Allocated memory is still 52.4 MB. Free memory was 28.4 MB in the beginning and 28.1 MB in the end (delta: 345.2 kB). Peak memory consumption was 345.2 kB. Max. memory is 14.3 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 24, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] int x; [L18] float y, z; [L20] x = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L23] y = x*x - 2.f [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_square_int.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 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: 10 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=12occurred 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, 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 0.1.25-9a8b2e8 [2020-10-20 00:20:18,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:20:18,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:20:18,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:20:18,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:20:18,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:20:18,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:20:18,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:20:18,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:20:18,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:20:18,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:20:18,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:20:18,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:20:18,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:20:18,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:20:18,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:20:18,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:20:18,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:20:18,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:20:18,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:20:18,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:20:18,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:20:18,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:20:18,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:20:18,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:20:18,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:20:18,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:20:18,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:20:18,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:20:18,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:20:18,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:20:18,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:20:18,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:20:18,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:20:18,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:20:18,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:20:18,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:20:18,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:20:18,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:20:18,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:20:18,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:20:18,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:20:18,962 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:20:18,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:20:18,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:20:18,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:20:18,965 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:20:18,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:20:18,965 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:20:18,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:20:18,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:20:18,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:20:18,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:20:18,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:20:18,967 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:20:18,967 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:20:18,967 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:20:18,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:20:18,968 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:20:18,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:20:18,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:20:18,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:20:18,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:20:18,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:20:18,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:20:18,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:20:18,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:20:18,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:20:18,970 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:20:18,971 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:20:18,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:20:18,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:20:18,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:20:18,972 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2020-10-20 00:20:19,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:20:19,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:20:19,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:20:19,192 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:20:19,192 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:20:19,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square_int.c [2020-10-20 00:20:19,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb851fec9/44081813646b4a018b68dc2cc116ab7e/FLAG826ab8173 [2020-10-20 00:20:19,665 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:20:19,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square_int.c [2020-10-20 00:20:19,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb851fec9/44081813646b4a018b68dc2cc116ab7e/FLAG826ab8173 [2020-10-20 00:20:20,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb851fec9/44081813646b4a018b68dc2cc116ab7e [2020-10-20 00:20:20,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:20:20,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:20:20,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:20:20,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:20:20,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:20:20,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@645f1ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20, skipping insertion in model container [2020-10-20 00:20:20,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:20:20,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:20:20,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:20:20,340 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:20:20,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:20:20,378 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:20:20,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20 WrapperNode [2020-10-20 00:20:20,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:20:20,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:20:20,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:20:20,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:20:20,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:20:20,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:20:20,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:20:20,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:20:20,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (1/1) ... [2020-10-20 00:20:20,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:20:20,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:20:20,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:20:20,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:20:20,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (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 [2020-10-20 00:20:20,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:20:20,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:20:20,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:20:20,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:20:22,090 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:20:22,091 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-20 00:20:22,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:22 BoogieIcfgContainer [2020-10-20 00:20:22,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:20:22,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:20:22,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:20:22,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:20:22,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:20:20" (1/3) ... [2020-10-20 00:20:22,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7965d5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:20:22, skipping insertion in model container [2020-10-20 00:20:22,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:20" (2/3) ... [2020-10-20 00:20:22,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7965d5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:20:22, skipping insertion in model container [2020-10-20 00:20:22,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:22" (3/3) ... [2020-10-20 00:20:22,129 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-10-20 00:20:22,169 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:20:22,184 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:20:22,201 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:20:22,228 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:20:22,229 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:20:22,229 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:20:22,229 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:20:22,230 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:20:22,230 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:20:22,230 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:20:22,231 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:20:22,251 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-20 00:20:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:20:22,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:20:22,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:20:22,258 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:20:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:20:22,263 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-20 00:20:22,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:20:22,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470142218] [2020-10-20 00:20:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 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 [2020-10-20 00:20:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:20:22,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:20:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:20:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:20:22,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:20:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:20:22,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470142218] [2020-10-20 00:20:22,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:20:22,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:20:22,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645009685] [2020-10-20 00:20:22,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:20:22,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:20:22,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:20:22,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:20:22,446 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-20 00:20:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:20:22,460 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-20 00:20:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:20:22,461 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-20 00:20:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:20:22,470 INFO L225 Difference]: With dead ends: 20 [2020-10-20 00:20:22,470 INFO L226 Difference]: Without dead ends: 7 [2020-10-20 00:20:22,474 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 [2020-10-20 00:20:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-20 00:20:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-20 00:20:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 00:20:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-20 00:20:22,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-20 00:20:22,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:20:22,503 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-20 00:20:22,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:20:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-20 00:20:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:20:22,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:20:22,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:20:22,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:20:22,712 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:20:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:20:22,712 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-20 00:20:22,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:20:22,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147406033] [2020-10-20 00:20:22,714 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 [2020-10-20 00:20:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:20:22,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:20:22,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:20:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:20:24,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:20:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:20:27,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147406033] [2020-10-20 00:20:27,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:20:27,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-20 00:20:27,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693641234] [2020-10-20 00:20:27,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:20:27,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:20:27,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:20:27,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:20:27,090 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 5 states. [2020-10-20 00:20:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:20:27,422 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-10-20 00:20:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:20:27,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-10-20 00:20:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:20:27,423 INFO L225 Difference]: With dead ends: 7 [2020-10-20 00:20:27,423 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:20:27,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:20:27,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:20:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:20:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:20:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:20:27,426 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-10-20 00:20:27,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:20:27,426 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:20:27,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:20:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:20:27,426 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:20:27,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:20:27,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:20:27,680 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:20:27,681 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-10-20 00:20:27,681 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-10-20 00:20:27,681 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-10-20 00:20:27,682 INFO L277 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2020-10-20 00:20:27,682 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:20:27,682 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:20:27,682 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:20:27,682 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:20:27,682 INFO L277 CegarLoopResult]: At program point L26(lines 15 27) the Hoare annotation is: true [2020-10-20 00:20:27,683 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:20:27,683 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-10-20 00:20:27,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:20:27 BoogieIcfgContainer [2020-10-20 00:20:27,693 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:20:27,693 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:20:27,694 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:20:27,694 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:20:27,695 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:22" (3/4) ... [2020-10-20 00:20:27,699 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:20:27,711 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-20 00:20:27,712 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 00:20:27,712 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 00:20:27,712 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:20:27,760 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:20:27,760 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:20:27,763 INFO L168 Benchmark]: Toolchain (without parser) took 7737.18 ms. Allocated memory was 35.1 MB in the beginning and 47.7 MB in the end (delta: 12.6 MB). Free memory was 14.2 MB in the beginning and 14.9 MB in the end (delta: -672.8 kB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:27,764 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 33.6 MB. Free memory was 8.4 MB in the beginning and 8.3 MB in the end (delta: 63.0 kB). Peak memory consumption was 63.0 kB. Max. memory is 14.3 GB. [2020-10-20 00:20:27,765 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.36 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 13.3 MB in the beginning and 24.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:27,766 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.85 ms. Allocated memory is still 44.0 MB. Free memory was 24.7 MB in the beginning and 22.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:27,767 INFO L168 Benchmark]: Boogie Preprocessor took 27.77 ms. Allocated memory is still 44.0 MB. Free memory was 22.9 MB in the beginning and 21.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:27,768 INFO L168 Benchmark]: RCFGBuilder took 1647.87 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 21.4 MB in the beginning and 21.2 MB in the end (delta: 276.5 kB). Peak memory consumption was 9.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:27,768 INFO L168 Benchmark]: TraceAbstraction took 5585.50 ms. Allocated memory was 46.1 MB in the beginning and 47.7 MB in the end (delta: 1.6 MB). Free memory was 20.7 MB in the beginning and 17.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:27,769 INFO L168 Benchmark]: Witness Printer took 66.66 ms. Allocated memory is still 47.7 MB. Free memory was 17.9 MB in the beginning and 14.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:27,774 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 33.6 MB. Free memory was 8.4 MB in the beginning and 8.3 MB in the end (delta: 63.0 kB). Peak memory consumption was 63.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 348.36 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 13.3 MB in the beginning and 24.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 36.85 ms. Allocated memory is still 44.0 MB. Free memory was 24.7 MB in the beginning and 22.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 27.77 ms. Allocated memory is still 44.0 MB. Free memory was 22.9 MB in the beginning and 21.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 1647.87 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 21.4 MB in the beginning and 21.2 MB in the end (delta: 276.5 kB). Peak memory consumption was 9.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 5585.50 ms. Allocated memory was 46.1 MB in the beginning and 47.7 MB in the end (delta: 1.6 MB). Free memory was 20.7 MB in the beginning and 17.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 GB. * Witness Printer took 66.66 ms. Allocated memory is still 47.7 MB. Free memory was 17.9 MB in the beginning and 14.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 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, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 1 SDslu, 3 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 0.1s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 165 SizeOfPredicates, 6 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 6 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...