./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/inv_square_int.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ee8e70e7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/inv_square_int.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 ba8acdf434ba605da81b4b94488025a77c80baa5 ........................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/inv_square_int.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 ba8acdf434ba605da81b4b94488025a77c80baa5 ................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-ee8e70e [2020-10-24 14:38:36,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:38:36,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:38:36,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:38:36,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:38:36,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:38:36,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:38:36,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:38:36,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:38:36,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:38:36,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:38:36,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:38:36,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:38:36,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:38:36,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:38:36,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:38:36,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:38:36,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:38:36,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:38:36,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:38:36,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:38:36,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:38:36,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:38:36,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:38:36,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:38:36,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:38:36,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:38:36,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:38:36,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:38:36,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:38:36,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:38:36,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:38:36,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:38:36,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:38:36,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:38:36,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:38:36,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:38:36,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:38:36,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:38:36,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:38:36,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:38:36,343 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 14:38:36,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:38:36,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:38:36,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:38:36,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:38:36,406 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:38:36,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:38:36,407 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:38:36,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 14:38:36,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:38:36,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:38:36,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:38:36,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:38:36,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:38:36,410 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:38:36,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:38:36,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:38:36,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:38:36,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:38:36,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:38:36,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:38:36,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:38:36,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:38:36,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:38:36,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:38:36,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:38:36,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 14:38:36,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 14:38:36,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:38:36,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:38:36,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2020-10-24 14:38:36,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:38:36,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:38:36,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:38:36,880 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:38:36,881 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:38:36,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square_int.c [2020-10-24 14:38:36,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b939f83/a06fdfbcb6674a83a03c97b4a60fc7c5/FLAG260f5516c [2020-10-24 14:38:37,606 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:38:37,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square_int.c [2020-10-24 14:38:37,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b939f83/a06fdfbcb6674a83a03c97b4a60fc7c5/FLAG260f5516c [2020-10-24 14:38:37,979 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93b939f83/a06fdfbcb6674a83a03c97b4a60fc7c5 [2020-10-24 14:38:37,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:38:37,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:38:37,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:38:37,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:38:37,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:38:38,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:38:37" (1/1) ... [2020-10-24 14:38:38,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306cbad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38, skipping insertion in model container [2020-10-24 14:38:38,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:38:37" (1/1) ... [2020-10-24 14:38:38,016 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:38:38,036 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:38:38,326 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:38:38,338 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:38:38,359 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:38:38,383 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:38:38,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38 WrapperNode [2020-10-24 14:38:38,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:38:38,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:38:38,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:38:38,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:38:38,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (1/1) ... [2020-10-24 14:38:38,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (1/1) ... [2020-10-24 14:38:38,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:38:38,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:38:38,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:38:38,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:38:38,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (1/1) ... [2020-10-24 14:38:38,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (1/1) ... [2020-10-24 14:38:38,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (1/1) ... [2020-10-24 14:38:38,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (1/1) ... [2020-10-24 14:38:38,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (1/1) ... [2020-10-24 14:38:38,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (1/1) ... [2020-10-24 14:38:38,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (1/1) ... [2020-10-24 14:38:38,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:38:38,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:38:38,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:38:38,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:38:38,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:38:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 14:38:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:38:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:38:38,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:38:38,884 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:38:38,885 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-24 14:38:38,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:38:38 BoogieIcfgContainer [2020-10-24 14:38:38,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:38:38,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:38:38,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:38:38,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:38:38,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:38:37" (1/3) ... [2020-10-24 14:38:38,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a229032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:38:38, skipping insertion in model container [2020-10-24 14:38:38,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:38" (2/3) ... [2020-10-24 14:38:38,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a229032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:38:38, skipping insertion in model container [2020-10-24 14:38:38,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:38:38" (3/3) ... [2020-10-24 14:38:38,899 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-10-24 14:38:38,913 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:38:38,920 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:38:38,935 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:38:38,971 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:38:38,971 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:38:38,971 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:38:38,972 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:38:38,972 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:38:38,972 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:38:38,973 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:38:38,973 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:38:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-24 14:38:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:38:38,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:38:38,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:38:38,998 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:38:39,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:38:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-24 14:38:39,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:38:39,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219292344] [2020-10-24 14:38:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:38:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:38:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:38:39,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219292344] [2020-10-24 14:38:39,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:38:39,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 14:38:39,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638509567] [2020-10-24 14:38:39,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:38:39,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:38:39,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:38:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:38:39,237 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-24 14:38:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:38:39,258 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-24 14:38:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:38:39,260 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 14:38:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:38:39,270 INFO L225 Difference]: With dead ends: 20 [2020-10-24 14:38:39,270 INFO L226 Difference]: Without dead ends: 7 [2020-10-24 14:38:39,274 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 14:38:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-24 14:38:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-24 14:38:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-24 14:38:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-24 14:38:39,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-24 14:38:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:38:39,312 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-24 14:38:39,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:38:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-24 14:38:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:38:39,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:38:39,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:38:39,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 14:38:39,314 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:38:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:38:39,315 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-24 14:38:39,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:38:39,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379741673] [2020-10-24 14:38:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:38:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:38:39,364 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:38:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:38:39,389 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:38:39,428 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 14:38:39,429 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:38:39,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 14:38:39,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:38:39 BoogieIcfgContainer [2020-10-24 14:38:39,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:38:39,474 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:38:39,474 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:38:39,474 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:38:39,475 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:38:38" (3/4) ... [2020-10-24 14:38:39,480 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 14:38:39,481 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:38:39,487 INFO L168 Benchmark]: Toolchain (without parser) took 1498.05 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 23.3 MB in the beginning and 37.4 MB in the end (delta: -14.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:38:39,489 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 37.7 MB. Free memory was 18.2 MB in the beginning and 18.2 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:38:39,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.18 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 24.6 MB in the end (delta: -1.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:39,494 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.05 ms. Allocated memory is still 46.1 MB. Free memory was 24.6 MB in the beginning and 23.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:39,495 INFO L168 Benchmark]: Boogie Preprocessor took 47.16 ms. Allocated memory is still 46.1 MB. Free memory was 23.1 MB in the beginning and 22.2 MB in the end (delta: 897.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:38:39,497 INFO L168 Benchmark]: RCFGBuilder took 397.55 ms. Allocated memory is still 46.1 MB. Free memory was 22.1 MB in the beginning and 23.3 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:39,499 INFO L168 Benchmark]: TraceAbstraction took 583.29 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.9 MB in the beginning and 37.9 MB in the end (delta: -15.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:38:39,501 INFO L168 Benchmark]: Witness Printer took 7.61 ms. Allocated memory is still 56.6 MB. Free memory was 37.6 MB in the beginning and 37.4 MB in the end (delta: 256.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:38:39,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 37.7 MB. Free memory was 18.2 MB in the beginning and 18.2 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 394.18 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 24.6 MB in the end (delta: -1.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.05 ms. Allocated memory is still 46.1 MB. Free memory was 24.6 MB in the beginning and 23.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.16 ms. Allocated memory is still 46.1 MB. Free memory was 23.1 MB in the beginning and 22.2 MB in the end (delta: 897.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 397.55 ms. Allocated memory is still 46.1 MB. Free memory was 22.1 MB in the beginning and 23.3 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 583.29 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.9 MB in the beginning and 37.9 MB in the end (delta: -15.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 7.61 ms. Allocated memory is still 56.6 MB. Free memory was 37.6 MB in the beginning and 37.4 MB in the end (delta: 256.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 23, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 24. Possible FailurePath: [L17] int x; [L18] float y, z; [L20] x = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L23] y = x*x - 2.f [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_square_int.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-ee8e70e [2020-10-24 14:38:42,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:38:42,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:38:42,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:38:42,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:38:42,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:38:42,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:38:42,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:38:42,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:38:42,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:38:42,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:38:42,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:38:42,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:38:42,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:38:42,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:38:42,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:38:42,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:38:42,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:38:42,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:38:42,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:38:42,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:38:42,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:38:42,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:38:42,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:38:42,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:38:42,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:38:42,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:38:42,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:38:42,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:38:42,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:38:42,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:38:42,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:38:42,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:38:42,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:38:42,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:38:42,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:38:42,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:38:42,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:38:42,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:38:42,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:38:42,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:38:42,461 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 14:38:42,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:38:42,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:38:42,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:38:42,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:38:42,508 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:38:42,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:38:42,508 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:38:42,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:38:42,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:38:42,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:38:42,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:38:42,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:38:42,511 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 14:38:42,512 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 14:38:42,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:38:42,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:38:42,513 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:38:42,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:38:42,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:38:42,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:38:42,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:38:42,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:38:42,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:38:42,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:38:42,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:38:42,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:38:42,516 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 14:38:42,517 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 14:38:42,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:38:42,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:38:42,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 14:38:42,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2020-10-24 14:38:43,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:38:43,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:38:43,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:38:43,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:38:43,058 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:38:43,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square_int.c [2020-10-24 14:38:43,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42ad4550f/cdfa40fe893e47cca6c4c7ea1d085b2e/FLAGa45e3b2ff [2020-10-24 14:38:43,784 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:38:43,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square_int.c [2020-10-24 14:38:43,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42ad4550f/cdfa40fe893e47cca6c4c7ea1d085b2e/FLAGa45e3b2ff [2020-10-24 14:38:44,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42ad4550f/cdfa40fe893e47cca6c4c7ea1d085b2e [2020-10-24 14:38:44,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:38:44,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:38:44,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:38:44,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:38:44,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:38:44,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b528334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44, skipping insertion in model container [2020-10-24 14:38:44,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,221 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:38:44,240 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:38:44,420 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:38:44,459 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:38:44,489 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:38:44,527 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:38:44,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44 WrapperNode [2020-10-24 14:38:44,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:38:44,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:38:44,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:38:44,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:38:44,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:38:44,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:38:44,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:38:44,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:38:44,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... [2020-10-24 14:38:44,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:38:44,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:38:44,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:38:44,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:38:44,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:38:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 14:38:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:38:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:38:44,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:38:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-10-24 14:38:46,171 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:38:46,171 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-24 14:38:46,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:38:46 BoogieIcfgContainer [2020-10-24 14:38:46,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:38:46,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:38:46,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:38:46,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:38:46,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:38:44" (1/3) ... [2020-10-24 14:38:46,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d2009d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:38:46, skipping insertion in model container [2020-10-24 14:38:46,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:38:44" (2/3) ... [2020-10-24 14:38:46,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d2009d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:38:46, skipping insertion in model container [2020-10-24 14:38:46,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:38:46" (3/3) ... [2020-10-24 14:38:46,183 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-10-24 14:38:46,196 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:38:46,202 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:38:46,216 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:38:46,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:38:46,244 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:38:46,245 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:38:46,245 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:38:46,245 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:38:46,245 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:38:46,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:38:46,245 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:38:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-24 14:38:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:38:46,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:38:46,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:38:46,268 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:38:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:38:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-24 14:38:46,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:38:46,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410769723] [2020-10-24 14:38:46,289 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 14:38:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:38:46,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 14:38:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:38:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:38:46,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:38:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:38:46,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410769723] [2020-10-24 14:38:46,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:38:46,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 14:38:46,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956491951] [2020-10-24 14:38:46,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:38:46,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:38:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:38:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:38:46,500 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-24 14:38:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:38:46,517 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-24 14:38:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:38:46,519 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 14:38:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:38:46,529 INFO L225 Difference]: With dead ends: 20 [2020-10-24 14:38:46,529 INFO L226 Difference]: Without dead ends: 7 [2020-10-24 14:38:46,533 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 14:38:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-24 14:38:46,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-24 14:38:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-24 14:38:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-24 14:38:46,568 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-24 14:38:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:38:46,568 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-24 14:38:46,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:38:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-24 14:38:46,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:38:46,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:38:46,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:38:46,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 14:38:46,780 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:38:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:38:46,783 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-24 14:38:46,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:38:46,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550520858] [2020-10-24 14:38:46,784 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 14:38:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:38:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-24 14:38:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:38:47,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-24 14:38:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:38:48,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:38:50,607 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~nondet8_6| (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~y~0_7 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~nondet10_5| (_ BitVec 32))) (let ((.cse2 (fp ((_ extract 31 31) |v_ULTIMATE.start_main_#t~nondet8_6|) ((_ extract 30 23) |v_ULTIMATE.start_main_#t~nondet8_6|) ((_ extract 22 0) |v_ULTIMATE.start_main_#t~nondet8_6|))) (.cse1 (fp ((_ extract 31 31) v_ULTIMATE.start_main_~y~0_7) ((_ extract 30 23) v_ULTIMATE.start_main_~y~0_7) ((_ extract 22 0) v_ULTIMATE.start_main_~y~0_7))) (.cse0 (fp ((_ extract 31 31) |v_ULTIMATE.start_main_#t~nondet10_5|) ((_ extract 30 23) |v_ULTIMATE.start_main_#t~nondet10_5|) ((_ extract 22 0) |v_ULTIMATE.start_main_#t~nondet10_5|)))) (or (not (= .cse0 (_ +zero 8 24))) (not (= .cse1 (fp.sub c_~CRM ((_ to_fp 8 24) c_~CRM (bvmul ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0)) .cse2))) (not (= .cse2 ((_ to_fp 8 24) c_~CRM 2.0))) (not (fp.eq .cse1 .cse0))))) is different from false [2020-10-24 14:38:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:38:51,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550520858] [2020-10-24 14:38:51,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:38:51,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-24 14:38:51,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408122701] [2020-10-24 14:38:51,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 14:38:51,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:38:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 14:38:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-24 14:38:51,838 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 5 states. [2020-10-24 14:38:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:38:52,171 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-10-24 14:38:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 14:38:52,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-10-24 14:38:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:38:52,171 INFO L225 Difference]: With dead ends: 7 [2020-10-24 14:38:52,172 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 14:38:52,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-24 14:38:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 14:38:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 14:38:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 14:38:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 14:38:52,174 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-10-24 14:38:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:38:52,174 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 14:38:52,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 14:38:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 14:38:52,175 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 14:38:52,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 14:38:52,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 14:38:52,432 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-24 14:38:52,432 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-10-24 14:38:52,432 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-10-24 14:38:52,432 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-10-24 14:38:52,433 INFO L277 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2020-10-24 14:38:52,433 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-24 14:38:52,433 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-24 14:38:52,433 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-24 14:38:52,433 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-24 14:38:52,433 INFO L277 CegarLoopResult]: At program point L26(lines 15 27) the Hoare annotation is: true [2020-10-24 14:38:52,434 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-24 14:38:52,434 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-10-24 14:38:52,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:38:52 BoogieIcfgContainer [2020-10-24 14:38:52,443 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:38:52,444 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:38:52,445 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:38:52,445 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:38:52,446 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:38:46" (3/4) ... [2020-10-24 14:38:52,450 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-24 14:38:52,462 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-24 14:38:52,463 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-24 14:38:52,468 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-24 14:38:52,469 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-24 14:38:52,540 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 14:38:52,541 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:38:52,547 INFO L168 Benchmark]: Toolchain (without parser) took 8380.76 ms. Allocated memory was 37.7 MB in the beginning and 46.1 MB in the end (delta: 8.4 MB). Free memory was 14.9 MB in the beginning and 28.2 MB in the end (delta: -13.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:52,549 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 37.7 MB. Free memory was 22.4 MB in the beginning and 22.4 MB in the end (delta: 29.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:38:52,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.79 ms. Allocated memory is still 37.7 MB. Free memory was 14.2 MB in the beginning and 13.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:52,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.06 ms. Allocated memory was 37.7 MB in the beginning and 46.1 MB in the end (delta: 8.4 MB). Free memory was 13.0 MB in the beginning and 29.6 MB in the end (delta: -16.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:52,553 INFO L168 Benchmark]: Boogie Preprocessor took 57.54 ms. Allocated memory is still 46.1 MB. Free memory was 29.6 MB in the beginning and 28.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:52,555 INFO L168 Benchmark]: RCFGBuilder took 1495.76 ms. Allocated memory is still 46.1 MB. Free memory was 28.4 MB in the beginning and 28.6 MB in the end (delta: -223.2 kB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:52,557 INFO L168 Benchmark]: TraceAbstraction took 6268.66 ms. Allocated memory is still 46.1 MB. Free memory was 28.2 MB in the beginning and 17.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:52,558 INFO L168 Benchmark]: Witness Printer took 96.66 ms. Allocated memory is still 46.1 MB. Free memory was 17.6 MB in the beginning and 28.2 MB in the end (delta: -10.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:38:52,572 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 37.7 MB. Free memory was 22.4 MB in the beginning and 22.4 MB in the end (delta: 29.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 359.79 ms. Allocated memory is still 37.7 MB. Free memory was 14.2 MB in the beginning and 13.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 84.06 ms. Allocated memory was 37.7 MB in the beginning and 46.1 MB in the end (delta: 8.4 MB). Free memory was 13.0 MB in the beginning and 29.6 MB in the end (delta: -16.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.54 ms. Allocated memory is still 46.1 MB. Free memory was 29.6 MB in the beginning and 28.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1495.76 ms. Allocated memory is still 46.1 MB. Free memory was 28.4 MB in the beginning and 28.6 MB in the end (delta: -223.2 kB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6268.66 ms. Allocated memory is still 46.1 MB. Free memory was 28.2 MB in the beginning and 17.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Witness Printer took 96.66 ms. Allocated memory is still 46.1 MB. Free memory was 17.6 MB in the beginning and 28.2 MB in the end (delta: -10.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 1 SDslu, 3 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 165 SizeOfPredicates, 7 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...