./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer --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 1d97d268d682e2021ff98bdbb1deaf100696d038 .............................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer --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 1d97d268d682e2021ff98bdbb1deaf100696d038 .......................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:05:30,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:05:30,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:05:30,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:05:30,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:05:30,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:05:30,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:05:30,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:05:30,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:05:30,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:05:30,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:05:30,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:05:30,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:05:30,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:05:30,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:05:30,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:05:30,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:05:30,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:05:30,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:05:30,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:05:30,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:05:30,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:05:30,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:05:30,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:05:30,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:05:30,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:05:30,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:05:30,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:05:30,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:05:30,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:05:30,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:05:30,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:05:30,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:05:30,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:05:30,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:05:30,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:05:30,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:05:30,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:05:30,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:05:30,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:05:30,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:05:30,567 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:05:30,611 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:05:30,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:05:30,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:05:30,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:05:30,617 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:05:30,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:05:30,617 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:05:30,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:05:30,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:05:30,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:05:30,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:05:30,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:05:30,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:05:30,620 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:05:30,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:05:30,620 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:05:30,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:05:30,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:05:30,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:05:30,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:05:30,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:05:30,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:05:30,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:05:30,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:05:30,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:05:30,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:05:30,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:05:30,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:05:30,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:05:30,623 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:/tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-11-28 03:05:30,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:05:30,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:05:30,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:05:31,001 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:05:31,002 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:05:31,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-28 03:05:31,096 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/data/596a8cbe3/c18b5d1460d04505bae9554721d0d8d0/FLAG84d99dc71 [2020-11-28 03:05:31,666 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:05:31,666 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-28 03:05:31,678 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/data/596a8cbe3/c18b5d1460d04505bae9554721d0d8d0/FLAG84d99dc71 [2020-11-28 03:05:32,005 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/data/596a8cbe3/c18b5d1460d04505bae9554721d0d8d0 [2020-11-28 03:05:32,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:05:32,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:05:32,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:05:32,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:05:32,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:05:32,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a590041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32, skipping insertion in model container [2020-11-28 03:05:32,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:05:32,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:05:32,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:05:32,290 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:05:32,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:05:32,343 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:05:32,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32 WrapperNode [2020-11-28 03:05:32,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:05:32,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:05:32,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:05:32,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:05:32,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:05:32,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:05:32,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:05:32,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:05:32,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (1/1) ... [2020-11-28 03:05:32,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:05:32,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:05:32,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:05:32,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:05:32,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/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 [2020-11-28 03:05:32,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:05:32,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:05:32,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-28 03:05:32,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:05:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-28 03:05:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:05:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:05:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:05:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:05:33,010 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:05:33,012 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 03:05:33,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:33 BoogieIcfgContainer [2020-11-28 03:05:33,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:05:33,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:05:33,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:05:33,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:05:33,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:05:32" (1/3) ... [2020-11-28 03:05:33,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23af8a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:33, skipping insertion in model container [2020-11-28 03:05:33,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:32" (2/3) ... [2020-11-28 03:05:33,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23af8a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:33, skipping insertion in model container [2020-11-28 03:05:33,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:33" (3/3) ... [2020-11-28 03:05:33,028 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-11-28 03:05:33,040 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:05:33,045 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:05:33,058 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:05:33,099 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:05:33,099 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:05:33,099 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:05:33,099 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:05:33,100 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:05:33,100 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:05:33,100 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:05:33,100 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:05:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-28 03:05:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:05:33,123 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:33,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:33,126 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:33,134 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-11-28 03:05:33,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:33,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184741189] [2020-11-28 03:05:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:33,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184741189] [2020-11-28 03:05:33,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:05:33,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:05:33,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237976835] [2020-11-28 03:05:33,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:05:33,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:33,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:05:33,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:05:33,378 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-28 03:05:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:33,397 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-28 03:05:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:05:33,399 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-28 03:05:33,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:33,411 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:05:33,411 INFO L226 Difference]: Without dead ends: 10 [2020-11-28 03:05:33,427 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 [2020-11-28 03:05:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-28 03:05:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-28 03:05:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:05:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-28 03:05:33,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-11-28 03:05:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:33,463 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-28 03:05:33,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:05:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-28 03:05:33,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:05:33,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:33,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:33,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:05:33,466 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:33,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-11-28 03:05:33,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:33,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050197518] [2020-11-28 03:05:33,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:05:33,578 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:05:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:05:33,661 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:05:33,686 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:05:33,686 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:05:33,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:05:33,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:05:33 BoogieIcfgContainer [2020-11-28 03:05:33,719 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:05:33,719 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:05:33,719 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:05:33,720 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:05:33,720 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:33" (3/4) ... [2020-11-28 03:05:33,724 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 03:05:33,724 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:05:33,726 INFO L168 Benchmark]: Toolchain (without parser) took 1714.83 ms. Allocated memory was 96.5 MB in the beginning and 134.2 MB in the end (delta: 37.7 MB). Free memory was 69.1 MB in the beginning and 67.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:33,727 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory is still 54.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:05:33,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.36 ms. Allocated memory was 96.5 MB in the beginning and 134.2 MB in the end (delta: 37.7 MB). Free memory was 69.1 MB in the beginning and 109.6 MB in the end (delta: -40.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:33,728 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.55 ms. Allocated memory is still 134.2 MB. Free memory was 109.6 MB in the beginning and 108.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:05:33,729 INFO L168 Benchmark]: Boogie Preprocessor took 63.34 ms. Allocated memory is still 134.2 MB. Free memory was 108.2 MB in the beginning and 106.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:33,730 INFO L168 Benchmark]: RCFGBuilder took 562.16 ms. Allocated memory is still 134.2 MB. Free memory was 106.5 MB in the beginning and 91.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:33,730 INFO L168 Benchmark]: TraceAbstraction took 700.07 ms. Allocated memory is still 134.2 MB. Free memory was 90.7 MB in the beginning and 67.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:33,731 INFO L168 Benchmark]: Witness Printer took 4.65 ms. Allocated memory is still 134.2 MB. Free memory was 67.7 MB in the beginning and 67.2 MB in the end (delta: 474.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:05:33,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory is still 54.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 332.36 ms. Allocated memory was 96.5 MB in the beginning and 134.2 MB in the end (delta: 37.7 MB). Free memory was 69.1 MB in the beginning and 109.6 MB in the end (delta: -40.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.55 ms. Allocated memory is still 134.2 MB. Free memory was 109.6 MB in the beginning and 108.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.34 ms. Allocated memory is still 134.2 MB. Free memory was 108.2 MB in the beginning and 106.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 562.16 ms. Allocated memory is still 134.2 MB. Free memory was 106.5 MB in the beginning and 91.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 700.07 ms. Allocated memory is still 134.2 MB. Free memory was 90.7 MB in the beginning and 67.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 4.65 ms. Allocated memory is still 134.2 MB. Free memory was 67.7 MB in the beginning and 67.2 MB in the end (delta: 474.2 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 bitwiseOr at line 38, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryDOUBLEComparisonOperation at line 65. Possible FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L3] __assert_fail("0", "sqrt_poly2.c", 3, "reach_error") VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 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=15occurred 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, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 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-a4ecdab [2020-11-28 03:05:36,192 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-11-28 03:05:36,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:05:36,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:05:36,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:05:36,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:05:36,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:05:36,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:05:36,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:05:36,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:05:36,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:05:36,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:05:36,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:05:36,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-28 03:05:36,362 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:05:36,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:05:36,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:05:36,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:05:36,368 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:05:36,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:05:36,369 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:05:36,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:05:36,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:05:36,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:05:36,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:05:36,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:05:36,371 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 03:05:36,371 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 03:05:36,372 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:05:36,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:05:36,372 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:05:36,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:05:36,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:05:36,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:05:36,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:05:36,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:05:36,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:05:36,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:05:36,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:05:36,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:05:36,376 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-28 03:05:36,376 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 03:05:36,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:05:36,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:05:36,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 03:05:36,377 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:/tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-11-28 03:05:36,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:05:36,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:05:36,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:05:36,775 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:05:36,776 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:05:36,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-28 03:05:36,860 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/data/e7d66c3ca/8322106041c94c66b30041c821196e8a/FLAGc0af87378 [2020-11-28 03:05:37,358 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:05:37,359 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-28 03:05:37,368 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/data/e7d66c3ca/8322106041c94c66b30041c821196e8a/FLAGc0af87378 [2020-11-28 03:05:37,742 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/data/e7d66c3ca/8322106041c94c66b30041c821196e8a [2020-11-28 03:05:37,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:05:37,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:05:37,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:05:37,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:05:37,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:05:37,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:37" (1/1) ... [2020-11-28 03:05:37,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e23b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:37, skipping insertion in model container [2020-11-28 03:05:37,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:37" (1/1) ... [2020-11-28 03:05:37,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:05:37,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:05:37,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:05:37,991 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:05:38,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:05:38,091 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:05:38,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38 WrapperNode [2020-11-28 03:05:38,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:05:38,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:05:38,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:05:38,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:05:38,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (1/1) ... [2020-11-28 03:05:38,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (1/1) ... [2020-11-28 03:05:38,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:05:38,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:05:38,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:05:38,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:05:38,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (1/1) ... [2020-11-28 03:05:38,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (1/1) ... [2020-11-28 03:05:38,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (1/1) ... [2020-11-28 03:05:38,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (1/1) ... [2020-11-28 03:05:38,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (1/1) ... [2020-11-28 03:05:38,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (1/1) ... [2020-11-28 03:05:38,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (1/1) ... [2020-11-28 03:05:38,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:05:38,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:05:38,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:05:38,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:05:38,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/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 [2020-11-28 03:05:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-11-28 03:05:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-11-28 03:05:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 03:05:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:05:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-28 03:05:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:05:38,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:05:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:05:38,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-28 03:05:41,854 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:05:41,855 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 03:05:41,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:41 BoogieIcfgContainer [2020-11-28 03:05:41,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:05:41,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:05:41,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:05:41,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:05:41,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:05:37" (1/3) ... [2020-11-28 03:05:41,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7136b1b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:41, skipping insertion in model container [2020-11-28 03:05:41,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:38" (2/3) ... [2020-11-28 03:05:41,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7136b1b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:41, skipping insertion in model container [2020-11-28 03:05:41,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:41" (3/3) ... [2020-11-28 03:05:41,864 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-11-28 03:05:41,876 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:05:41,881 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:05:41,893 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:05:41,957 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:05:41,958 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:05:41,958 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:05:41,958 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:05:41,958 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:05:41,958 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:05:41,958 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:05:41,958 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:05:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-28 03:05:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:05:41,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:41,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:41,973 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-11-28 03:05:41,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-28 03:05:41,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476989016] [2020-11-28 03:05:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/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 [2020-11-28 03:05:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-28 03:05:43,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:43,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 03:05:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:43,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476989016] [2020-11-28 03:05:43,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:05:43,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-28 03:05:43,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761160724] [2020-11-28 03:05:43,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:05:43,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-28 03:05:43,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:05:43,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:05:43,695 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-28 03:05:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:43,733 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-28 03:05:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:05:43,735 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-28 03:05:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:43,744 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:05:43,746 INFO L226 Difference]: Without dead ends: 10 [2020-11-28 03:05:43,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:05:43,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-28 03:05:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-28 03:05:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:05:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-28 03:05:43,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-11-28 03:05:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:43,783 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-28 03:05:43,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:05:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-28 03:05:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:05:43,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:43,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:43,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 03:05:43,987 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:43,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-11-28 03:05:43,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-28 03:05:43,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801737375] [2020-11-28 03:05:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/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 [2020-11-28 03:05:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:05:45,901 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:05:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:05:47,905 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:05:48,089 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-28 03:05:48,089 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:05:48,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 03:05:48,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:05:48 BoogieIcfgContainer [2020-11-28 03:05:48,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:05:48,334 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:05:48,334 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:05:48,334 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:05:48,335 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:41" (3/4) ... [2020-11-28 03:05:48,337 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:05:48,394 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a66da7af-cf09-4ee8-b228-f40f4337bd11/bin/uautomizer/witness.graphml [2020-11-28 03:05:48,395 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:05:48,400 INFO L168 Benchmark]: Toolchain (without parser) took 10648.39 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 53.4 MB in the beginning and 53.5 MB in the end (delta: -185.7 kB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:48,401 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 71.3 MB. Free memory is still 52.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:05:48,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.74 ms. Allocated memory is still 71.3 MB. Free memory was 53.2 MB in the beginning and 53.3 MB in the end (delta: -181.4 kB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:48,402 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.88 ms. Allocated memory is still 71.3 MB. Free memory was 53.3 MB in the beginning and 51.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:48,403 INFO L168 Benchmark]: Boogie Preprocessor took 38.13 ms. Allocated memory is still 71.3 MB. Free memory was 51.6 MB in the beginning and 50.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:48,404 INFO L168 Benchmark]: RCFGBuilder took 3654.01 ms. Allocated memory is still 71.3 MB. Free memory was 50.1 MB in the beginning and 34.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:48,404 INFO L168 Benchmark]: TraceAbstraction took 6475.63 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 33.7 MB in the beginning and 56.1 MB in the end (delta: -22.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:05:48,414 INFO L168 Benchmark]: Witness Printer took 60.95 ms. Allocated memory is still 86.0 MB. Free memory was 56.1 MB in the beginning and 53.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:48,418 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 71.3 MB. Free memory is still 52.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 340.74 ms. Allocated memory is still 71.3 MB. Free memory was 53.2 MB in the beginning and 53.3 MB in the end (delta: -181.4 kB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.88 ms. Allocated memory is still 71.3 MB. Free memory was 53.3 MB in the beginning and 51.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.13 ms. Allocated memory is still 71.3 MB. Free memory was 51.6 MB in the beginning and 50.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3654.01 ms. Allocated memory is still 71.3 MB. Free memory was 50.1 MB in the beginning and 34.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6475.63 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 33.7 MB in the beginning and 56.1 MB in the end (delta: -22.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 60.95 ms. Allocated memory is still 86.0 MB. Free memory was 56.1 MB in the beginning and 53.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L3] __assert_fail("0", "sqrt_poly2.c", 3, "reach_error") VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 3.3s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 128 SizeOfPredicates, 0 NumberOfNonLiveVariables, 58 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...