./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 ee8e70e7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/inv_square-2.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/inv_square-2.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 052b65435ce93a43ae641d125fc7546191d1b08e ................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-ee8e70e [2020-10-24 14:37:36,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:37:36,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:37:36,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:37:36,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:37:36,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:37:36,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:37:36,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:37:36,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:37:36,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:37:36,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:37:36,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:37:36,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:37:36,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:37:36,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:37:36,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:37:36,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:37:36,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:37:36,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:37:36,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:37:36,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:37:36,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:37:36,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:37:36,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:37:36,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:37:36,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:37:36,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:37:36,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:37:36,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:37:36,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:37:36,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:37:36,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:37:36,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:37:36,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:37:36,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:37:36,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:37:36,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:37:36,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:37:36,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:37:36,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:37:36,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:37:36,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 14:37:36,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:37:36,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:37:36,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:37:36,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:37:36,579 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:37:36,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:37:36,580 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:37:36,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 14:37:36,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:37:36,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:37:36,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:37:36,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:37:36,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:37:36,581 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:37:36,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:37:36,582 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:37:36,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:37:36,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:37:36,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:37:36,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:37:36,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:37:36,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:37:36,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:37:36,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:37:36,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:37:36,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 14:37:36,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 14:37:36,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:37:36,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:37:36,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2020-10-24 14:37:36,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:37:37,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:37:37,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:37:37,049 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:37:37,051 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:37:37,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-2.c [2020-10-24 14:37:37,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/558bf4c25/e5e9682889ac45f8a182c0523dc87cfd/FLAGa37b89425 [2020-10-24 14:37:37,798 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:37:37,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c [2020-10-24 14:37:37,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/558bf4c25/e5e9682889ac45f8a182c0523dc87cfd/FLAGa37b89425 [2020-10-24 14:37:38,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/558bf4c25/e5e9682889ac45f8a182c0523dc87cfd [2020-10-24 14:37:38,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:37:38,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:37:38,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:37:38,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:37:38,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:37:38,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32acdab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38, skipping insertion in model container [2020-10-24 14:37:38,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,186 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:37:38,207 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:37:38,417 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:37:38,429 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:37:38,448 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:37:38,466 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:37:38,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38 WrapperNode [2020-10-24 14:37:38,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:37:38,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:37:38,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:37:38,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:37:38,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:37:38,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:37:38,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:37:38,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:37:38,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (1/1) ... [2020-10-24 14:37:38,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:37:38,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:37:38,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:37:38,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:37:38,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:37:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 14:37:38,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:37:38,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:37:38,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:37:38,875 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:37:38,876 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-24 14:37:38,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:38 BoogieIcfgContainer [2020-10-24 14:37:38,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:37:38,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:37:38,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:37:38,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:37:38,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:37:38" (1/3) ... [2020-10-24 14:37:38,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4369acc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:37:38, skipping insertion in model container [2020-10-24 14:37:38,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:38" (2/3) ... [2020-10-24 14:37:38,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4369acc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:37:38, skipping insertion in model container [2020-10-24 14:37:38,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:38" (3/3) ... [2020-10-24 14:37:38,891 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2020-10-24 14:37:38,906 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:37:38,912 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:37:38,931 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:37:38,969 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:37:38,969 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:37:38,970 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:37:38,970 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:37:38,970 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:37:38,971 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:37:38,971 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:37:38,971 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:37:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-24 14:37:39,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:37:39,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:37:39,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:37:39,006 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:37:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:37:39,023 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-10-24 14:37:39,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:37:39,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213103500] [2020-10-24 14:37:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:37:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:37:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:37:39,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213103500] [2020-10-24 14:37:39,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:37:39,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 14:37:39,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290326398] [2020-10-24 14:37:39,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:37:39,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:37:39,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:37:39,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:37:39,216 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-24 14:37:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:37:39,236 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-10-24 14:37:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:37:39,237 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 14:37:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:37:39,248 INFO L225 Difference]: With dead ends: 22 [2020-10-24 14:37:39,249 INFO L226 Difference]: Without dead ends: 7 [2020-10-24 14:37:39,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:37:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-24 14:37:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-24 14:37:39,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-24 14:37:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-24 14:37:39,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-24 14:37:39,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:37:39,297 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-24 14:37:39,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:37:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-24 14:37:39,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:37:39,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:37:39,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:37:39,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 14:37:39,299 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:37:39,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:37:39,300 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-10-24 14:37:39,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:37:39,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713400852] [2020-10-24 14:37:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:37:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:37:39,339 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:37:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:37:39,359 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:37:39,384 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 14:37:39,384 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:37:39,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 14:37:39,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:37:39 BoogieIcfgContainer [2020-10-24 14:37:39,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:37:39,413 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:37:39,414 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:37:39,414 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:37:39,415 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:38" (3/4) ... [2020-10-24 14:37:39,420 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 14:37:39,420 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:37:39,423 INFO L168 Benchmark]: Toolchain (without parser) took 1266.76 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 19.7 MB in the beginning and 29.4 MB in the end (delta: -9.7 MB). Peak memory consumption was 1.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:39,424 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 41.9 MB. Free memory is still 22.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:37:39,425 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.70 ms. Allocated memory is still 41.9 MB. Free memory was 19.0 MB in the beginning and 21.0 MB in the end (delta: -2.0 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:39,427 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.03 ms. Allocated memory is still 41.9 MB. Free memory was 20.9 MB in the beginning and 19.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:39,427 INFO L168 Benchmark]: Boogie Preprocessor took 25.48 ms. Allocated memory is still 41.9 MB. Free memory was 19.5 MB in the beginning and 18.5 MB in the end (delta: 959.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:37:39,428 INFO L168 Benchmark]: RCFGBuilder took 340.41 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 18.4 MB in the beginning and 26.0 MB in the end (delta: -7.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:39,429 INFO L168 Benchmark]: TraceAbstraction took 531.98 ms. Allocated memory is still 50.3 MB. Free memory was 25.5 MB in the beginning and 29.9 MB in the end (delta: -4.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:37:39,430 INFO L168 Benchmark]: Witness Printer took 7.11 ms. Allocated memory is still 50.3 MB. Free memory was 29.9 MB in the beginning and 29.4 MB in the end (delta: 493.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:37:39,435 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 41.9 MB. Free memory is still 22.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 301.70 ms. Allocated memory is still 41.9 MB. Free memory was 19.0 MB in the beginning and 21.0 MB in the end (delta: -2.0 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.03 ms. Allocated memory is still 41.9 MB. Free memory was 20.9 MB in the beginning and 19.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.48 ms. Allocated memory is still 41.9 MB. Free memory was 19.5 MB in the beginning and 18.5 MB in the end (delta: 959.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 340.41 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 18.4 MB in the beginning and 26.0 MB in the end (delta: -7.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 531.98 ms. Allocated memory is still 50.3 MB. Free memory was 25.5 MB in the beginning and 29.9 MB in the end (delta: -4.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 7.11 ms. Allocated memory is still 50.3 MB. Free memory was 29.9 MB in the beginning and 29.4 MB in the end (delta: 493.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 23, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 22. 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: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 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-ee8e70e [2020-10-24 14:37:42,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:37:42,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:37:42,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:37:42,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:37:42,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:37:42,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:37:42,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:37:42,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:37:42,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:37:42,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:37:42,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:37:42,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:37:42,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:37:42,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:37:42,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:37:42,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:37:42,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:37:42,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:37:42,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:37:42,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:37:42,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:37:42,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:37:42,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:37:42,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:37:42,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:37:42,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:37:42,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:37:42,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:37:42,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:37:42,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:37:42,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:37:42,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:37:42,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:37:42,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:37:42,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:37:42,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:37:42,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:37:42,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:37:42,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:37:42,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:37:42,412 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 14:37:42,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:37:42,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:37:42,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:37:42,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:37:42,475 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:37:42,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:37:42,476 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:37:42,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:37:42,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:37:42,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:37:42,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:37:42,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:37:42,479 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 14:37:42,479 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 14:37:42,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:37:42,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:37:42,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:37:42,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:37:42,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:37:42,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:37:42,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:37:42,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:37:42,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:37:42,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:37:42,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:37:42,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:37:42,483 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 14:37:42,483 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 14:37:42,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:37:42,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:37:42,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 14:37:42,484 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2020-10-24 14:37:42,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:37:42,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:37:42,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:37:42,970 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:37:42,971 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:37:42,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-2.c [2020-10-24 14:37:43,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd736fb30/4b8267618f9f4ccead96501f346f4818/FLAGd32c8659b [2020-10-24 14:37:43,682 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:37:43,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c [2020-10-24 14:37:43,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd736fb30/4b8267618f9f4ccead96501f346f4818/FLAGd32c8659b [2020-10-24 14:37:44,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd736fb30/4b8267618f9f4ccead96501f346f4818 [2020-10-24 14:37:44,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:37:44,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:37:44,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:37:44,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:37:44,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:37:44,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6ca9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44, skipping insertion in model container [2020-10-24 14:37:44,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,105 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:37:44,121 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:37:44,310 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:37:44,337 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:37:44,359 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:37:44,381 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:37:44,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44 WrapperNode [2020-10-24 14:37:44,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:37:44,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:37:44,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:37:44,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:37:44,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:37:44,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:37:44,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:37:44,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:37:44,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (1/1) ... [2020-10-24 14:37:44,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:37:44,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:37:44,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:37:44,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:37:44,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:37:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 14:37:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:37:44,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:37:44,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:37:44,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-10-24 14:37:46,290 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:37:46,291 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-24 14:37:46,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:46 BoogieIcfgContainer [2020-10-24 14:37:46,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:37:46,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:37:46,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:37:46,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:37:46,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:37:44" (1/3) ... [2020-10-24 14:37:46,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148b24a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:37:46, skipping insertion in model container [2020-10-24 14:37:46,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:44" (2/3) ... [2020-10-24 14:37:46,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148b24a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:37:46, skipping insertion in model container [2020-10-24 14:37:46,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:46" (3/3) ... [2020-10-24 14:37:46,303 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2020-10-24 14:37:46,317 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:37:46,323 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:37:46,354 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:37:46,390 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:37:46,391 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:37:46,391 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:37:46,391 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:37:46,391 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:37:46,392 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:37:46,392 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:37:46,392 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:37:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-24 14:37:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 14:37:46,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:37:46,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:37:46,416 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:37:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:37:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1236260269, now seen corresponding path program 1 times [2020-10-24 14:37:46,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:37:46,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461597313] [2020-10-24 14:37:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-24 14:37:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:37:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 14:37:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:37:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:37:46,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:37:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:37:46,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461597313] [2020-10-24 14:37:46,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:37:46,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 14:37:46,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507079179] [2020-10-24 14:37:46,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:37:46,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:37:46,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:37:46,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:37:46,692 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-24 14:37:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:37:46,710 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-24 14:37:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:37:46,711 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 14:37:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:37:46,721 INFO L225 Difference]: With dead ends: 28 [2020-10-24 14:37:46,721 INFO L226 Difference]: Without dead ends: 11 [2020-10-24 14:37:46,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:37:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-24 14:37:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-24 14:37:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-24 14:37:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-24 14:37:46,760 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2020-10-24 14:37:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:37:46,760 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-24 14:37:46,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:37:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-10-24 14:37:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 14:37:46,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:37:46,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:37:46,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 14:37:46,976 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:37:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:37:46,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1179001967, now seen corresponding path program 1 times [2020-10-24 14:37:46,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:37:46,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493938552] [2020-10-24 14:37:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-24 14:37:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:37:47,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-24 14:37:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:37:47,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:37:47,376 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-24 14:37:47,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:37:55,011 WARN L193 SmtUtils]: Spent 5.07 s on a formula simplification that was a NOOP. DAG size: 52 [2020-10-24 14:37:59,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:37:59,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:37:59,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:38:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:38:01,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:38:03,287 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-10-24 14:38:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:38:04,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493938552] [2020-10-24 14:38:04,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:38:04,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 9 [2020-10-24 14:38:04,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089462744] [2020-10-24 14:38:04,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 14:38:04,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:38:04,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 14:38:04,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2020-10-24 14:38:04,475 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 9 states. [2020-10-24 14:38:09,552 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 58 [2020-10-24 14:38:11,130 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-10-24 14:38:18,831 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-10-24 14:38:31,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:38:31,114 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-24 14:38:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 14:38:31,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-10-24 14:38:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:38:31,117 INFO L225 Difference]: With dead ends: 25 [2020-10-24 14:38:31,117 INFO L226 Difference]: Without dead ends: 19 [2020-10-24 14:38:31,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=44, Invalid=110, Unknown=2, NotChecked=0, Total=156 [2020-10-24 14:38:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-24 14:38:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 11. [2020-10-24 14:38:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-24 14:38:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-10-24 14:38:31,123 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 10 [2020-10-24 14:38:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:38:31,124 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-10-24 14:38:31,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 14:38:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-10-24 14:38:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 14:38:31,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:38:31,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:38:31,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 14:38:31,332 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:38:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:38:31,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1178942385, now seen corresponding path program 1 times [2020-10-24 14:38:31,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:38:31,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083136800] [2020-10-24 14:38:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-24 14:38:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:38:31,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-24 14:38:31,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:38:32,192 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-10-24 14:38:32,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:38:33,026 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2020-10-24 14:38:33,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:38:33,476 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-24 14:38:33,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:38:33,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:38:34,458 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-24 14:38:34,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:38:34,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:38:34,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:38:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:38:35,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:38:38,514 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-10-24 14:38:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:38:40,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083136800] [2020-10-24 14:38:40,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:38:40,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 4] imperfect sequences [] total 11 [2020-10-24 14:38:40,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165715224] [2020-10-24 14:38:40,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 14:38:40,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:38:40,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 14:38:40,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-24 14:38:40,284 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2020-10-24 14:38:43,314 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-24 14:38:44,644 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 25 [2020-10-24 14:38:47,707 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-10-24 14:38:49,533 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-24 14:38:50,891 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-10-24 14:38:53,619 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-24 14:38:55,181 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-24 14:38:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:38:55,183 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-24 14:38:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 14:38:55,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-24 14:38:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:38:55,183 INFO L225 Difference]: With dead ends: 17 [2020-10-24 14:38:55,183 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 14:38:55,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-10-24 14:38:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 14:38:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 14:38:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 14:38:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 14:38:55,186 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-10-24 14:38:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:38:55,187 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 14:38:55,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 14:38:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 14:38:55,187 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 14:38:55,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-24 14:38:55,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 14:38:55,438 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-24 14:38:55,439 INFO L277 CegarLoopResult]: At program point L27(lines 15 28) the Hoare annotation is: true [2020-10-24 14:38:55,439 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-10-24 14:38:55,439 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-10-24 14:38:55,439 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-10-24 14:38:55,439 INFO L277 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2020-10-24 14:38:55,439 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-24 14:38:55,439 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-24 14:38:55,440 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-24 14:38:55,440 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-24 14:38:55,441 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-24 14:38:55,441 INFO L274 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-10-24 14:38:55,441 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-10-24 14:38:55,441 INFO L274 CegarLoopResult]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2020-10-24 14:38:55,441 INFO L274 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-10-24 14:38:55,441 INFO L274 CegarLoopResult]: For program point L22-4(lines 22 26) no Hoare annotation was computed. [2020-10-24 14:38:55,441 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-10-24 14:38:55,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:38:55 BoogieIcfgContainer [2020-10-24 14:38:55,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:38:55,459 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:38:55,459 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:38:55,459 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:38:55,459 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:46" (3/4) ... [2020-10-24 14:38:55,463 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-24 14:38:55,480 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-24 14:38:55,481 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-24 14:38:55,481 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-24 14:38:55,481 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-24 14:38:55,569 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 14:38:55,570 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:38:55,572 INFO L168 Benchmark]: Toolchain (without parser) took 71494.10 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.4 MB in the beginning and 25.5 MB in the end (delta: -138.4 kB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:55,573 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 48.2 MB. Free memory was 33.2 MB in the beginning and 33.2 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:38:55,573 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.52 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 27.7 MB in the end (delta: -2.9 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:55,574 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.15 ms. Allocated memory is still 48.2 MB. Free memory was 27.7 MB in the beginning and 25.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:38:55,575 INFO L168 Benchmark]: Boogie Preprocessor took 30.73 ms. Allocated memory is still 48.2 MB. Free memory was 25.9 MB in the beginning and 24.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:55,575 INFO L168 Benchmark]: RCFGBuilder took 1791.85 ms. Allocated memory is still 48.2 MB. Free memory was 24.7 MB in the beginning and 22.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:55,576 INFO L168 Benchmark]: TraceAbstraction took 69163.10 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.1 MB in the beginning and 28.5 MB in the end (delta: -6.5 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:55,577 INFO L168 Benchmark]: Witness Printer took 111.47 ms. Allocated memory is still 58.7 MB. Free memory was 28.1 MB in the beginning and 25.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:55,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 48.2 MB. Free memory was 33.2 MB in the beginning and 33.2 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.52 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 27.7 MB in the end (delta: -2.9 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 82.15 ms. Allocated memory is still 48.2 MB. Free memory was 27.7 MB in the beginning and 25.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.73 ms. Allocated memory is still 48.2 MB. Free memory was 25.9 MB in the beginning and 24.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1791.85 ms. Allocated memory is still 48.2 MB. Free memory was 24.7 MB in the beginning and 22.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 69163.10 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.1 MB in the beginning and 28.5 MB in the end (delta: -6.5 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Witness Printer took 111.47 ms. Allocated memory is still 58.7 MB. Free memory was 28.1 MB in the beginning and 25.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 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, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 69.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 41.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 30 SDslu, 24 SDs, 0 SdLazy, 106 SolverSat, 18 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 24.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 39.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 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, 0.3s SatisfiabilityAnalysisTime, 26.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 15 QuantifiedInterpolants, 11133 SizeOfPredicates, 22 NumberOfNonLiveVariables, 131 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...