./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/float_int_inv_square.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/float_int_inv_square.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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ........................................................................................................................................................................................................................................................................... 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/float_int_inv_square.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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ........................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-ee8e70e [2020-10-24 14:29:44,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:29:44,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:29:44,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:29:44,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:29:44,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:29:44,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:29:44,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:29:44,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:29:44,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:29:44,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:29:44,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:29:44,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:29:44,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:29:44,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:29:44,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:29:44,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:29:44,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:29:44,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:29:44,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:29:44,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:29:44,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:29:44,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:29:44,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:29:44,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:29:44,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:29:44,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:29:44,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:29:44,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:29:44,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:29:44,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:29:44,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:29:44,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:29:44,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:29:44,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:29:44,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:29:44,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:29:44,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:29:44,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:29:44,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:29:44,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:29:44,567 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 14:29:44,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:29:44,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:29:44,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:29:44,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:29:44,631 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:29:44,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:29:44,631 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:29:44,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 14:29:44,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:29:44,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:29:44,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:29:44,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:29:44,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:29:44,634 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:29:44,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:29:44,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:29:44,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:29:44,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:29:44,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:29:44,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:29:44,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:29:44,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:29:44,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:29:44,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:29:44,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:29:44,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 14:29:44,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 14:29:44,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:29:44,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:29:44,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-10-24 14:29:45,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:29:45,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:29:45,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:29:45,088 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:29:45,089 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:29:45,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-24 14:29:45,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516775f99/7c9cdd6df16a4700b9d9fe4ca4d32e44/FLAG37457774c [2020-10-24 14:29:45,799 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:29:45,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-24 14:29:45,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516775f99/7c9cdd6df16a4700b9d9fe4ca4d32e44/FLAG37457774c [2020-10-24 14:29:46,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516775f99/7c9cdd6df16a4700b9d9fe4ca4d32e44 [2020-10-24 14:29:46,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:29:46,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:29:46,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:29:46,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:29:46,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:29:46,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2686f634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46, skipping insertion in model container [2020-10-24 14:29:46,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,233 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:29:46,273 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:29:46,480 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:29:46,490 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:29:46,513 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:29:46,529 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:29:46,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46 WrapperNode [2020-10-24 14:29:46,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:29:46,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:29:46,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:29:46,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:29:46,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:29:46,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:29:46,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:29:46,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:29:46,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (1/1) ... [2020-10-24 14:29:46,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:29:46,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:29:46,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:29:46,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:29:46,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (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 14:29:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 14:29:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:29:46,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:29:46,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:29:46,903 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:29:46,904 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-24 14:29:46,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:46 BoogieIcfgContainer [2020-10-24 14:29:46,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:29:46,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:29:46,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:29:46,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:29:46,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:29:46" (1/3) ... [2020-10-24 14:29:46,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70895418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:46, skipping insertion in model container [2020-10-24 14:29:46,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:46" (2/3) ... [2020-10-24 14:29:46,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70895418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:46, skipping insertion in model container [2020-10-24 14:29:46,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:46" (3/3) ... [2020-10-24 14:29:46,916 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-10-24 14:29:46,929 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:29:46,934 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:29:46,949 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:29:47,008 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:29:47,010 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:29:47,010 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:29:47,010 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:29:47,011 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:29:47,011 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:29:47,011 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:29:47,012 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:29:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-24 14:29:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:29:47,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:29:47,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:29:47,057 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:29:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:29:47,066 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-24 14:29:47,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:29:47,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735150013] [2020-10-24 14:29:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:29:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:29:47,306 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 14:29:47,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735150013] [2020-10-24 14:29:47,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:29:47,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 14:29:47,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559928731] [2020-10-24 14:29:47,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:29:47,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:29:47,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:29:47,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:29:47,333 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-24 14:29:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:29:47,353 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-24 14:29:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:29:47,355 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 14:29:47,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:29:47,365 INFO L225 Difference]: With dead ends: 20 [2020-10-24 14:29:47,365 INFO L226 Difference]: Without dead ends: 7 [2020-10-24 14:29:47,369 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 14:29:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-24 14:29:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-24 14:29:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-24 14:29:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-24 14:29:47,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-24 14:29:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:29:47,405 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-24 14:29:47,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:29:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-24 14:29:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:29:47,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:29:47,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:29:47,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 14:29:47,412 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:29:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:29:47,413 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-24 14:29:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:29:47,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002133240] [2020-10-24 14:29:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:29:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:29:47,452 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:29:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:29:47,477 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:29:47,498 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 14:29:47,499 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:29:47,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 14:29:47,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:29:47 BoogieIcfgContainer [2020-10-24 14:29:47,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:29:47,525 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:29:47,525 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:29:47,526 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:29:47,526 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:46" (3/4) ... [2020-10-24 14:29:47,530 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 14:29:47,532 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:29:47,538 INFO L168 Benchmark]: Toolchain (without parser) took 1354.05 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 20.2 MB in the beginning and 30.1 MB in the end (delta: -10.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:47,540 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 41.9 MB. Free memory was 26.5 MB in the beginning and 26.4 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:29:47,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.36 ms. Allocated memory is still 41.9 MB. Free memory was 19.5 MB in the beginning and 19.3 MB in the end (delta: 148.4 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:47,543 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.47 ms. Allocated memory is still 41.9 MB. Free memory was 19.3 MB in the beginning and 18.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:29:47,544 INFO L168 Benchmark]: Boogie Preprocessor took 19.39 ms. Allocated memory is still 41.9 MB. Free memory was 18.0 MB in the beginning and 17.0 MB in the end (delta: 978.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:47,545 INFO L168 Benchmark]: RCFGBuilder took 316.66 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 16.9 MB in the beginning and 26.7 MB in the end (delta: -9.8 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:47,547 INFO L168 Benchmark]: TraceAbstraction took 617.20 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 30.5 MB in the end (delta: -4.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:29:47,548 INFO L168 Benchmark]: Witness Printer took 6.93 ms. Allocated memory is still 50.3 MB. Free memory was 30.3 MB in the beginning and 30.1 MB in the end (delta: 216.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:29:47,565 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 41.9 MB. Free memory was 26.5 MB in the beginning and 26.4 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 340.36 ms. Allocated memory is still 41.9 MB. Free memory was 19.5 MB in the beginning and 19.3 MB in the end (delta: 148.4 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.47 ms. Allocated memory is still 41.9 MB. Free memory was 19.3 MB in the beginning and 18.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.39 ms. Allocated memory is still 41.9 MB. Free memory was 18.0 MB in the beginning and 17.0 MB in the end (delta: 978.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 316.66 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 16.9 MB in the beginning and 26.7 MB in the end (delta: -9.8 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 617.20 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 30.5 MB in the end (delta: -4.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 6.93 ms. Allocated memory is still 50.3 MB. Free memory was 30.3 MB in the beginning and 30.1 MB in the end (delta: 216.3 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 21, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 22. Possible FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L3] __assert_fail("0", "float_int_inv_square.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 0.2.0-ee8e70e [2020-10-24 14:29:50,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:29:50,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:29:50,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:29:50,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:29:50,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:29:50,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:29:50,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:29:50,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:29:50,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:29:50,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:29:50,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:29:50,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:29:50,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:29:50,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:29:50,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:29:50,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:29:50,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:29:50,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:29:50,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:29:50,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:29:50,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:29:50,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:29:50,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:29:50,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:29:50,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:29:50,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:29:50,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:29:50,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:29:50,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:29:50,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:29:50,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:29:50,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:29:50,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:29:50,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:29:50,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:29:50,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:29:50,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:29:50,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:29:50,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:29:50,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:29:50,203 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 14:29:50,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:29:50,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:29:50,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:29:50,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:29:50,264 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:29:50,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:29:50,265 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:29:50,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:29:50,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:29:50,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:29:50,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:29:50,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:29:50,267 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 14:29:50,267 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 14:29:50,267 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:29:50,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:29:50,268 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:29:50,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:29:50,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:29:50,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:29:50,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:29:50,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:29:50,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:29:50,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:29:50,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:29:50,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:29:50,270 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 14:29:50,270 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 14:29:50,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:29:50,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:29:50,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 14:29:50,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-10-24 14:29:50,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:29:50,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:29:50,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:29:50,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:29:50,721 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:29:50,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-24 14:29:50,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/659b1c898/068b2a680c6f459fa7f649d11b16c699/FLAGbe63ba6e0 [2020-10-24 14:29:51,367 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:29:51,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-24 14:29:51,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/659b1c898/068b2a680c6f459fa7f649d11b16c699/FLAGbe63ba6e0 [2020-10-24 14:29:51,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/659b1c898/068b2a680c6f459fa7f649d11b16c699 [2020-10-24 14:29:51,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:29:51,746 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:29:51,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:29:51,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:29:51,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:29:51,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:51" (1/1) ... [2020-10-24 14:29:51,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@643f8b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:51, skipping insertion in model container [2020-10-24 14:29:51,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:51" (1/1) ... [2020-10-24 14:29:51,801 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:29:51,849 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:29:52,091 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:29:52,116 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:29:52,142 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:29:52,176 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:29:52,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52 WrapperNode [2020-10-24 14:29:52,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:29:52,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:29:52,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:29:52,183 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:29:52,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (1/1) ... [2020-10-24 14:29:52,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (1/1) ... [2020-10-24 14:29:52,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:29:52,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:29:52,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:29:52,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:29:52,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (1/1) ... [2020-10-24 14:29:52,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (1/1) ... [2020-10-24 14:29:52,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (1/1) ... [2020-10-24 14:29:52,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (1/1) ... [2020-10-24 14:29:52,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (1/1) ... [2020-10-24 14:29:52,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (1/1) ... [2020-10-24 14:29:52,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (1/1) ... [2020-10-24 14:29:52,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:29:52,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:29:52,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:29:52,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:29:52,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (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 14:29:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 14:29:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:29:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:29:52,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:29:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-10-24 14:29:53,592 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:29:53,592 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-24 14:29:53,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:53 BoogieIcfgContainer [2020-10-24 14:29:53,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:29:53,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:29:53,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:29:53,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:29:53,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:29:51" (1/3) ... [2020-10-24 14:29:53,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a42592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:53, skipping insertion in model container [2020-10-24 14:29:53,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:52" (2/3) ... [2020-10-24 14:29:53,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a42592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:53, skipping insertion in model container [2020-10-24 14:29:53,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:53" (3/3) ... [2020-10-24 14:29:53,608 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-10-24 14:29:53,625 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:29:53,630 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:29:53,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:29:53,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:29:53,679 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:29:53,679 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:29:53,679 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:29:53,680 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:29:53,680 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:29:53,680 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:29:53,680 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:29:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-24 14:29:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:29:53,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:29:53,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:29:53,702 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:29:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:29:53,710 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-24 14:29:53,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:29:53,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831579052] [2020-10-24 14:29:53,729 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 14:29:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:29:53,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 14:29:53,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:29:53,895 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 14:29:53,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:29:53,899 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 14:29:53,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831579052] [2020-10-24 14:29:53,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:29:53,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 14:29:53,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764356207] [2020-10-24 14:29:53,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:29:53,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:29:53,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:29:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:29:53,928 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-24 14:29:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:29:53,943 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-24 14:29:53,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:29:53,945 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 14:29:53,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:29:53,953 INFO L225 Difference]: With dead ends: 20 [2020-10-24 14:29:53,954 INFO L226 Difference]: Without dead ends: 7 [2020-10-24 14:29:53,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:29:53,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-24 14:29:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-24 14:29:53,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-24 14:29:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-24 14:29:53,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-24 14:29:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:29:53,989 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-24 14:29:53,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:29:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-24 14:29:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:29:53,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:29:53,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:29:54,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 14:29:54,207 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:29:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:29:54,208 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-24 14:29:54,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:29:54,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317928048] [2020-10-24 14:29:54,210 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 14:29:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:29:54,345 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:29:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:29:54,452 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:29:54,490 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-24 14:29:54,491 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:29:54,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 14:29:54,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:29:54 BoogieIcfgContainer [2020-10-24 14:29:54,718 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:29:54,719 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:29:54,719 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:29:54,719 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:29:54,720 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:53" (3/4) ... [2020-10-24 14:29:54,722 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-24 14:29:54,762 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 14:29:54,762 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:29:54,764 INFO L168 Benchmark]: Toolchain (without parser) took 3021.63 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.9 MB in the beginning and 22.3 MB in the end (delta: -1.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:54,765 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 35.7 MB. Free memory was 19.8 MB in the beginning and 19.8 MB in the end (delta: 28.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:29:54,766 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.42 ms. Allocated memory is still 44.0 MB. Free memory was 20.3 MB in the beginning and 19.4 MB in the end (delta: 952.0 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:54,767 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.39 ms. Allocated memory is still 44.0 MB. Free memory was 19.3 MB in the beginning and 27.8 MB in the end (delta: -8.5 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:54,768 INFO L168 Benchmark]: Boogie Preprocessor took 27.07 ms. Allocated memory is still 44.0 MB. Free memory was 27.8 MB in the beginning and 26.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:54,769 INFO L168 Benchmark]: RCFGBuilder took 1336.50 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 26.5 MB in the beginning and 34.9 MB in the end (delta: -8.5 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:54,769 INFO L168 Benchmark]: TraceAbstraction took 1122.61 ms. Allocated memory is still 54.5 MB. Free memory was 34.7 MB in the beginning and 24.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:54,770 INFO L168 Benchmark]: Witness Printer took 42.92 ms. Allocated memory is still 54.5 MB. Free memory was 24.1 MB in the beginning and 22.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:29:54,775 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 35.7 MB. Free memory was 19.8 MB in the beginning and 19.8 MB in the end (delta: 28.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 428.42 ms. Allocated memory is still 44.0 MB. Free memory was 20.3 MB in the beginning and 19.4 MB in the end (delta: 952.0 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.39 ms. Allocated memory is still 44.0 MB. Free memory was 19.3 MB in the beginning and 27.8 MB in the end (delta: -8.5 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.07 ms. Allocated memory is still 44.0 MB. Free memory was 27.8 MB in the beginning and 26.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1336.50 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 26.5 MB in the beginning and 34.9 MB in the end (delta: -8.5 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1122.61 ms. Allocated memory is still 54.5 MB. Free memory was 34.7 MB in the beginning and 24.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. * Witness Printer took 42.92 ms. Allocated memory is still 54.5 MB. Free memory was 24.1 MB in the beginning and 22.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] EXPR 4.f [L21] EXPR x*x - 4.f [L21] y = x*x - 4.f [L22] 0.f [L11] COND TRUE !(cond) [L3] __assert_fail("0", "float_int_inv_square.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: 1.0s, 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, 10 GetRequests, 10 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 33 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...