./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 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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 0.1.25-9a8b2e8 [2020-10-20 00:18:17,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:18:17,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:18:17,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:18:17,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:18:17,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:18:17,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:18:17,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:18:17,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:18:17,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:18:17,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:18:17,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:18:17,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:18:17,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:18:17,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:18:17,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:18:17,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:18:17,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:18:17,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:18:17,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:18:17,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:18:17,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:18:17,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:18:17,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:18:17,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:18:17,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:18:17,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:18:17,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:18:17,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:18:17,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:18:17,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:18:17,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:18:17,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:18:17,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:18:17,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:18:17,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:18:17,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:18:17,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:18:17,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:18:17,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:18:17,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:18:17,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:18:17,661 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:18:17,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:18:17,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:18:17,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:18:17,664 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:18:17,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:18:17,664 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:18:17,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:18:17,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:18:17,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:18:17,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:18:17,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:18:17,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:18:17,667 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:18:17,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:18:17,668 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:18:17,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:18:17,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:18:17,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:18:17,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:18:17,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:18:17,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:18:17,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:18:17,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:18:17,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:18:17,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:18:17,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:18:17,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:18:17,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:18:17,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-10-20 00:18:17,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:18:17,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:18:17,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:18:17,944 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:18:17,945 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:18:17,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-20 00:18:18,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2acf923d0/271d4981d1d74242a2ae30c69db6f1af/FLAGe2d92448a [2020-10-20 00:18:18,517 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:18:18,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-20 00:18:18,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2acf923d0/271d4981d1d74242a2ae30c69db6f1af/FLAGe2d92448a [2020-10-20 00:18:18,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2acf923d0/271d4981d1d74242a2ae30c69db6f1af [2020-10-20 00:18:18,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:18:18,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:18:18,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:18:18,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:18:18,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:18:18,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:18:18" (1/1) ... [2020-10-20 00:18:18,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634fa40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:18, skipping insertion in model container [2020-10-20 00:18:18,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:18:18" (1/1) ... [2020-10-20 00:18:18,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:18:18,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:18:19,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:18:19,203 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:18:19,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:18:19,246 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:18:19,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19 WrapperNode [2020-10-20 00:18:19,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:18:19,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:18:19,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:18:19,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:18:19,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (1/1) ... [2020-10-20 00:18:19,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (1/1) ... [2020-10-20 00:18:19,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:18:19,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:18:19,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:18:19,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:18:19,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (1/1) ... [2020-10-20 00:18:19,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (1/1) ... [2020-10-20 00:18:19,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (1/1) ... [2020-10-20 00:18:19,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (1/1) ... [2020-10-20 00:18:19,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (1/1) ... [2020-10-20 00:18:19,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (1/1) ... [2020-10-20 00:18:19,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (1/1) ... [2020-10-20 00:18:19,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:18:19,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:18:19,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:18:19,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:18:19,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:18:19,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:18:19,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:18:19,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:18:19,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:18:19,580 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:18:19,580 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-20 00:18:19,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:18:19 BoogieIcfgContainer [2020-10-20 00:18:19,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:18:19,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:18:19,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:18:19,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:18:19,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:18:18" (1/3) ... [2020-10-20 00:18:19,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50eda932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:18:19, skipping insertion in model container [2020-10-20 00:18:19,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:19" (2/3) ... [2020-10-20 00:18:19,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50eda932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:18:19, skipping insertion in model container [2020-10-20 00:18:19,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:18:19" (3/3) ... [2020-10-20 00:18:19,592 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-10-20 00:18:19,606 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:18:19,626 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:18:19,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:18:19,680 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:18:19,681 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:18:19,681 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:18:19,682 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:18:19,682 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:18:19,682 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:18:19,683 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:18:19,683 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:18:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-20 00:18:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:18:19,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:18:19,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:18:19,710 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:18:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:18:19,718 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-20 00:18:19,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:18:19,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611185200] [2020-10-20 00:18:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:18:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:18:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:18:19,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611185200] [2020-10-20 00:18:19,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:18:19,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:18:19,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821921660] [2020-10-20 00:18:19,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:18:19,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:18:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:18:19,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:18:19,890 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-20 00:18:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:18:19,906 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-20 00:18:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:18:19,908 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-20 00:18:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:18:19,918 INFO L225 Difference]: With dead ends: 20 [2020-10-20 00:18:19,919 INFO L226 Difference]: Without dead ends: 7 [2020-10-20 00:18:19,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:18:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-20 00:18:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-20 00:18:19,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 00:18:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-20 00:18:19,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-20 00:18:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:18:19,960 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-20 00:18:19,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:18:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-20 00:18:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:18:19,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:18:19,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:18:19,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:18:19,962 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:18:19,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:18:19,963 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-20 00:18:19,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:18:19,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395269362] [2020-10-20 00:18:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:18:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:18:20,002 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:18:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:18:20,073 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:18:20,111 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:18:20,112 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:18:20,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:18:20,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:18:20 BoogieIcfgContainer [2020-10-20 00:18:20,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:18:20,147 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:18:20,148 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:18:20,148 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:18:20,149 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:18:19" (3/4) ... [2020-10-20 00:18:20,154 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:18:20,154 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:18:20,159 INFO L168 Benchmark]: Toolchain (without parser) took 1200.81 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 23.8 MB in the beginning and 22.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:20,161 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 32.5 MB. Free memory was 11.7 MB in the beginning and 11.6 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. [2020-10-20 00:18:20,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.66 ms. Allocated memory is still 43.0 MB. Free memory was 23.0 MB in the beginning and 25.0 MB in the end (delta: -2.1 MB). Peak memory consumption was 14.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:20,164 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.48 ms. Allocated memory is still 43.0 MB. Free memory was 24.9 MB in the beginning and 23.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:20,165 INFO L168 Benchmark]: Boogie Preprocessor took 22.66 ms. Allocated memory is still 43.0 MB. Free memory was 23.2 MB in the beginning and 22.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:20,167 INFO L168 Benchmark]: RCFGBuilder took 275.71 ms. Allocated memory is still 43.0 MB. Free memory was 22.1 MB in the beginning and 10.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:20,169 INFO L168 Benchmark]: TraceAbstraction took 563.05 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 10.2 MB in the beginning and 23.1 MB in the end (delta: -12.9 MB). Peak memory consumption was 5.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:20,171 INFO L168 Benchmark]: Witness Printer took 7.04 ms. Allocated memory is still 45.6 MB. Free memory was 23.1 MB in the beginning and 22.5 MB in the end (delta: 603.6 kB). Peak memory consumption was 603.6 kB. Max. memory is 14.3 GB. [2020-10-20 00:18:20,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 32.5 MB. Free memory was 11.7 MB in the beginning and 11.6 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 285.66 ms. Allocated memory is still 43.0 MB. Free memory was 23.0 MB in the beginning and 25.0 MB in the end (delta: -2.1 MB). Peak memory consumption was 14.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 36.48 ms. Allocated memory is still 43.0 MB. Free memory was 24.9 MB in the beginning and 23.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 22.66 ms. Allocated memory is still 43.0 MB. Free memory was 23.2 MB in the beginning and 22.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 275.71 ms. Allocated memory is still 43.0 MB. Free memory was 22.1 MB in the beginning and 10.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 563.05 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 10.2 MB in the beginning and 23.1 MB in the end (delta: -12.9 MB). Peak memory consumption was 5.6 MB. Max. memory is 14.3 GB. * Witness Printer took 7.04 ms. Allocated memory is still 45.6 MB. Free memory was 23.1 MB in the beginning and 22.5 MB in the end (delta: 603.6 kB). Peak memory consumption was 603.6 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 21. 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 0.1.25-9a8b2e8 [2020-10-20 00:18:22,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:18:22,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:18:22,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:18:22,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:18:22,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:18:22,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:18:22,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:18:22,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:18:22,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:18:22,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:18:22,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:18:22,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:18:22,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:18:22,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:18:22,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:18:22,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:18:22,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:18:22,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:18:22,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:18:22,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:18:22,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:18:22,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:18:22,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:18:22,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:18:22,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:18:22,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:18:22,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:18:22,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:18:22,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:18:22,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:18:22,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:18:22,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:18:22,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:18:22,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:18:22,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:18:22,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:18:22,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:18:22,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:18:22,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:18:22,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:18:22,651 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:18:22,690 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:18:22,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:18:22,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:18:22,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:18:22,694 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:18:22,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:18:22,695 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:18:22,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:18:22,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:18:22,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:18:22,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:18:22,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:18:22,697 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:18:22,698 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:18:22,698 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:18:22,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:18:22,699 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:18:22,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:18:22,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:18:22,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:18:22,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:18:22,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:18:22,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:18:22,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:18:22,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:18:22,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:18:22,702 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:18:22,702 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:18:22,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:18:22,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:18:22,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:18:22,703 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-10-20 00:18:22,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:18:22,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:18:22,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:18:22,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:18:22,939 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:18:22,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-20 00:18:23,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe376f67f/d53749d705d64e1e80666ba6f5683069/FLAG47f6ce728 [2020-10-20 00:18:23,590 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:18:23,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-20 00:18:23,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe376f67f/d53749d705d64e1e80666ba6f5683069/FLAG47f6ce728 [2020-10-20 00:18:23,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe376f67f/d53749d705d64e1e80666ba6f5683069 [2020-10-20 00:18:23,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:18:23,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:18:23,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:18:23,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:18:23,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:18:23,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:18:23" (1/1) ... [2020-10-20 00:18:23,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6235b8f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:23, skipping insertion in model container [2020-10-20 00:18:23,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:18:23" (1/1) ... [2020-10-20 00:18:24,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:18:24,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:18:24,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:18:24,236 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:18:24,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:18:24,273 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:18:24,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24 WrapperNode [2020-10-20 00:18:24,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:18:24,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:18:24,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:18:24,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:18:24,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (1/1) ... [2020-10-20 00:18:24,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (1/1) ... [2020-10-20 00:18:24,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:18:24,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:18:24,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:18:24,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:18:24,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (1/1) ... [2020-10-20 00:18:24,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (1/1) ... [2020-10-20 00:18:24,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (1/1) ... [2020-10-20 00:18:24,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (1/1) ... [2020-10-20 00:18:24,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (1/1) ... [2020-10-20 00:18:24,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (1/1) ... [2020-10-20 00:18:24,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (1/1) ... [2020-10-20 00:18:24,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:18:24,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:18:24,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:18:24,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:18:24,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:18:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:18:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:18:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:18:24,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:18:25,277 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:18:25,278 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-20 00:18:25,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:18:25 BoogieIcfgContainer [2020-10-20 00:18:25,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:18:25,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:18:25,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:18:25,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:18:25,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:18:23" (1/3) ... [2020-10-20 00:18:25,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7089ef4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:18:25, skipping insertion in model container [2020-10-20 00:18:25,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:18:24" (2/3) ... [2020-10-20 00:18:25,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7089ef4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:18:25, skipping insertion in model container [2020-10-20 00:18:25,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:18:25" (3/3) ... [2020-10-20 00:18:25,308 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-10-20 00:18:25,328 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:18:25,337 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:18:25,375 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:18:25,424 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:18:25,425 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:18:25,425 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:18:25,425 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:18:25,426 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:18:25,426 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:18:25,426 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:18:25,426 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:18:25,442 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-20 00:18:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:18:25,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:18:25,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:18:25,451 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:18:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:18:25,458 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-20 00:18:25,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:18:25,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308702550] [2020-10-20 00:18:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-20 00:18:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:18:25,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:18:25,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:18:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:18:25,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:18:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:18:25,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308702550] [2020-10-20 00:18:25,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:18:25,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:18:25,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688905808] [2020-10-20 00:18:25,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:18:25,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:18:25,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:18:25,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:18:25,688 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-20 00:18:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:18:25,706 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-20 00:18:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:18:25,707 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-20 00:18:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:18:25,716 INFO L225 Difference]: With dead ends: 20 [2020-10-20 00:18:25,716 INFO L226 Difference]: Without dead ends: 7 [2020-10-20 00:18:25,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:18:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-20 00:18:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-20 00:18:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 00:18:25,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-20 00:18:25,749 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-20 00:18:25,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:18:25,750 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-20 00:18:25,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:18:25,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-20 00:18:25,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:18:25,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:18:25,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:18:25,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:18:25,960 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:18:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:18:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-20 00:18:25,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:18:25,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185064214] [2020-10-20 00:18:25,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-20 00:18:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:18:26,069 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:18:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:18:26,153 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:18:26,184 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-20 00:18:26,185 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:18:26,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:18:26,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:18:26 BoogieIcfgContainer [2020-10-20 00:18:26,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:18:26,415 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:18:26,415 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:18:26,415 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:18:26,416 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:18:25" (3/4) ... [2020-10-20 00:18:26,419 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:18:26,462 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:18:26,462 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:18:26,465 INFO L168 Benchmark]: Toolchain (without parser) took 2485.65 ms. Allocated memory was 41.9 MB in the beginning and 44.6 MB in the end (delta: 2.6 MB). Free memory was 21.6 MB in the beginning and 10.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:26,466 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 32.0 MB. Free memory was 9.8 MB in the beginning and 9.7 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:18:26,467 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.72 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 20.8 MB in the beginning and 21.8 MB in the end (delta: -991.6 kB). Peak memory consumption was 11.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:26,468 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.42 ms. Allocated memory is still 42.5 MB. Free memory was 21.8 MB in the beginning and 20.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:26,469 INFO L168 Benchmark]: Boogie Preprocessor took 28.22 ms. Allocated memory is still 42.5 MB. Free memory was 20.0 MB in the beginning and 18.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:26,471 INFO L168 Benchmark]: RCFGBuilder took 939.08 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 18.6 MB in the beginning and 23.5 MB in the end (delta: -4.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:26,473 INFO L168 Benchmark]: TraceAbstraction took 1122.85 ms. Allocated memory was 44.0 MB in the beginning and 44.6 MB in the end (delta: 524.3 kB). Free memory was 23.0 MB in the beginning and 12.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:26,475 INFO L168 Benchmark]: Witness Printer took 47.45 ms. Allocated memory is still 44.6 MB. Free memory was 12.2 MB in the beginning and 10.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:18:26,493 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 32.0 MB. Free memory was 9.8 MB in the beginning and 9.7 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 289.72 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 20.8 MB in the beginning and 21.8 MB in the end (delta: -991.6 kB). Peak memory consumption was 11.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 37.42 ms. Allocated memory is still 42.5 MB. Free memory was 21.8 MB in the beginning and 20.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 28.22 ms. Allocated memory is still 42.5 MB. Free memory was 20.0 MB in the beginning and 18.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 939.08 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 18.6 MB in the beginning and 23.5 MB in the end (delta: -4.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1122.85 ms. Allocated memory was 44.0 MB in the beginning and 44.6 MB in the end (delta: 524.3 kB). Free memory was 23.0 MB in the beginning and 12.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. * Witness Printer took 47.45 ms. Allocated memory is still 44.6 MB. Free memory was 12.2 MB in the beginning and 10.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 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] 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: 0.9s, 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, 31 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...