./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/square_1.i --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_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/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 eb1826e8952b1eb941e064a85d9720fcb947ea7c ............................................................................................................................................................................................................................................................................ 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_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/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 eb1826e8952b1eb941e064a85d9720fcb947ea7c ........................................................................................................................................................................................................................................................................................ 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 [2020-11-30 01:33:01,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:33:01,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:33:01,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:33:01,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:33:01,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:33:01,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:33:01,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:33:01,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:33:01,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:33:01,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:33:01,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:33:01,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:33:01,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:33:01,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:33:01,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:33:01,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:33:01,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:33:01,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:33:01,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:33:01,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:33:01,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:33:01,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:33:01,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:33:01,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:33:01,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:33:01,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:33:01,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:33:01,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:33:01,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:33:01,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:33:01,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:33:01,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:33:01,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:33:01,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:33:01,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:33:01,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:33:01,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:33:01,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:33:01,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:33:01,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:33:01,498 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:33:01,534 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:33:01,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:33:01,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:33:01,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:33:01,539 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:33:01,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:33:01,540 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:33:01,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:33:01,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:33:01,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:33:01,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:33:01,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:33:01,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:33:01,544 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:33:01,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:33:01,545 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:33:01,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:33:01,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:33:01,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:33:01,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:33:01,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:33:01,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:33:01,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:33:01,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:33:01,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:33:01,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:33:01,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:33:01,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:33:01,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:33:01,550 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_a4d744b4-7516-4625-ae73-9b5980c71952/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1826e8952b1eb941e064a85d9720fcb947ea7c [2020-11-30 01:33:01,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:33:01,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:33:01,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:33:01,966 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:33:01,969 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:33:01,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/../../sv-benchmarks/c/floats-cdfpl/square_1.i [2020-11-30 01:33:02,062 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/data/76ed97124/ecc02cd89b0e47e9ae4dab7c4787c3e6/FLAG80865b569 [2020-11-30 01:33:02,665 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:33:02,666 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/sv-benchmarks/c/floats-cdfpl/square_1.i [2020-11-30 01:33:02,676 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/data/76ed97124/ecc02cd89b0e47e9ae4dab7c4787c3e6/FLAG80865b569 [2020-11-30 01:33:03,011 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/data/76ed97124/ecc02cd89b0e47e9ae4dab7c4787c3e6 [2020-11-30 01:33:03,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:33:03,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:33:03,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:33:03,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:33:03,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:33:03,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6ba53c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03, skipping insertion in model container [2020-11-30 01:33:03,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:33:03,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:33:03,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:33:03,321 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:33:03,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:33:03,382 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:33:03,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03 WrapperNode [2020-11-30 01:33:03,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:33:03,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:33:03,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:33:03,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:33:03,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:33:03,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:33:03,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:33:03,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:33:03,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (1/1) ... [2020-11-30 01:33:03,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:33:03,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:33:03,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:33:03,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:33:03,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/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 [2020-11-30 01:33:03,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:33:03,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:33:03,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:33:03,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:33:03,904 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:33:03,904 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-30 01:33:03,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:33:03 BoogieIcfgContainer [2020-11-30 01:33:03,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:33:03,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:33:03,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:33:03,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:33:03,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:33:03" (1/3) ... [2020-11-30 01:33:03,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2db066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:33:03, skipping insertion in model container [2020-11-30 01:33:03,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:03" (2/3) ... [2020-11-30 01:33:03,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2db066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:33:03, skipping insertion in model container [2020-11-30 01:33:03,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:33:03" (3/3) ... [2020-11-30 01:33:03,923 INFO L111 eAbstractionObserver]: Analyzing ICFG square_1.i [2020-11-30 01:33:03,939 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:33:03,945 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:33:03,959 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:33:03,998 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:33:03,998 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:33:03,998 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:33:03,999 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:33:03,999 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:33:03,999 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:33:03,999 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:33:04,000 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:33:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-30 01:33:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:33:04,027 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:33:04,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:33:04,029 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:33:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:04,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-11-30 01:33:04,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:04,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169204522] [2020-11-30 01:33:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:04,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169204522] [2020-11-30 01:33:04,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:33:04,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:33:04,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257524209] [2020-11-30 01:33:04,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:33:04,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:33:04,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:33:04,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:33:04,299 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-30 01:33:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:33:04,323 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-30 01:33:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:33:04,325 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-30 01:33:04,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:33:04,338 INFO L225 Difference]: With dead ends: 21 [2020-11-30 01:33:04,338 INFO L226 Difference]: Without dead ends: 8 [2020-11-30 01:33:04,345 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 [2020-11-30 01:33:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-30 01:33:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-30 01:33:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 01:33:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-11-30 01:33:04,417 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-11-30 01:33:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:33:04,418 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-11-30 01:33:04,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:33:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-11-30 01:33:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:33:04,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:33:04,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:33:04,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:33:04,421 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:33:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-11-30 01:33:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:04,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373176012] [2020-11-30 01:33:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:04,482 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:04,534 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:04,566 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:33:04,566 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:33:04,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:33:04,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:33:04 BoogieIcfgContainer [2020-11-30 01:33:04,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:33:04,601 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:33:04,602 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:33:04,602 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:33:04,603 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:33:03" (3/4) ... [2020-11-30 01:33:04,607 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 01:33:04,607 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:33:04,610 INFO L168 Benchmark]: Toolchain (without parser) took 1592.01 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 61.2 MB in the beginning and 86.5 MB in the end (delta: -25.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:33:04,611 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 90.2 MB. Free memory was 49.3 MB in the beginning and 49.3 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:33:04,612 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.50 ms. Allocated memory is still 90.2 MB. Free memory was 61.2 MB in the beginning and 68.3 MB in the end (delta: -7.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:33:04,613 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.54 ms. Allocated memory is still 90.2 MB. Free memory was 68.3 MB in the beginning and 66.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:33:04,614 INFO L168 Benchmark]: Boogie Preprocessor took 41.53 ms. Allocated memory is still 90.2 MB. Free memory was 66.9 MB in the beginning and 65.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:33:04,615 INFO L168 Benchmark]: RCFGBuilder took 427.80 ms. Allocated memory is still 90.2 MB. Free memory was 65.9 MB in the beginning and 55.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:33:04,617 INFO L168 Benchmark]: TraceAbstraction took 691.69 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 55.1 MB in the beginning and 86.9 MB in the end (delta: -31.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:33:04,617 INFO L168 Benchmark]: Witness Printer took 5.62 ms. Allocated memory is still 113.2 MB. Free memory was 86.9 MB in the beginning and 86.5 MB in the end (delta: 412.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:33:04,623 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 90.2 MB. Free memory was 49.3 MB in the beginning and 49.3 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 349.50 ms. Allocated memory is still 90.2 MB. Free memory was 61.2 MB in the beginning and 68.3 MB in the end (delta: -7.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.54 ms. Allocated memory is still 90.2 MB. Free memory was 68.3 MB in the beginning and 66.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.53 ms. Allocated memory is still 90.2 MB. Free memory was 66.9 MB in the beginning and 65.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 427.80 ms. Allocated memory is still 90.2 MB. Free memory was 65.9 MB in the beginning and 55.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 691.69 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 55.1 MB in the beginning and 86.9 MB in the end (delta: -31.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.62 ms. Allocated memory is still 113.2 MB. Free memory was 86.9 MB in the beginning and 86.5 MB in the end (delta: 412.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.39f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_1.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 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: 11 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, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 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 [2020-11-30 01:33:08,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:33:08,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:33:08,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:33:08,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:33:08,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:33:08,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:33:08,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:33:08,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:33:08,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:33:08,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:33:08,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:33:08,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:33:08,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:33:08,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:33:08,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:33:08,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:33:08,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:33:08,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:33:08,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:33:08,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:33:08,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:33:08,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:33:08,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:33:08,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:33:08,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:33:08,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:33:08,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:33:08,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:33:08,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:33:08,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:33:08,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:33:08,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:33:08,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:33:08,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:33:08,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:33:08,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:33:08,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:33:08,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:33:08,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:33:08,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:33:08,542 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-30 01:33:08,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:33:08,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:33:08,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:33:08,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:33:08,608 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:33:08,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:33:08,609 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:33:08,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:33:08,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:33:08,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:33:08,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:33:08,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:33:08,612 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 01:33:08,612 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 01:33:08,613 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:33:08,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:33:08,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:33:08,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:33:08,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:33:08,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:33:08,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:33:08,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:33:08,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:33:08,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:33:08,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:33:08,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:33:08,616 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-30 01:33:08,617 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 01:33:08,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:33:08,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:33:08,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:33:08,618 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_a4d744b4-7516-4625-ae73-9b5980c71952/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1826e8952b1eb941e064a85d9720fcb947ea7c [2020-11-30 01:33:09,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:33:09,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:33:09,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:33:09,229 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:33:09,230 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:33:09,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/../../sv-benchmarks/c/floats-cdfpl/square_1.i [2020-11-30 01:33:09,326 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/data/3787397c2/7f360e3355c1494399e666197f6b3883/FLAG4a0fea8de [2020-11-30 01:33:10,096 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:33:10,098 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/sv-benchmarks/c/floats-cdfpl/square_1.i [2020-11-30 01:33:10,108 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/data/3787397c2/7f360e3355c1494399e666197f6b3883/FLAG4a0fea8de [2020-11-30 01:33:10,428 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/data/3787397c2/7f360e3355c1494399e666197f6b3883 [2020-11-30 01:33:10,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:33:10,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:33:10,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:33:10,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:33:10,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:33:10,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:10,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69664860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10, skipping insertion in model container [2020-11-30 01:33:10,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:10,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:33:10,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:33:10,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:33:10,774 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:33:10,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:33:10,844 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:33:10,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10 WrapperNode [2020-11-30 01:33:10,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:33:10,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:33:10,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:33:10,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:33:10,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:10,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:10,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:33:10,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:33:10,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:33:10,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:33:10,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:10,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:10,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:10,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:10,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:10,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:10,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (1/1) ... [2020-11-30 01:33:11,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:33:11,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:33:11,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:33:11,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:33:11,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/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 [2020-11-30 01:33:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 01:33:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:33:11,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:33:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:33:13,528 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:33:13,529 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-30 01:33:13,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:33:13 BoogieIcfgContainer [2020-11-30 01:33:13,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:33:13,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:33:13,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:33:13,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:33:13,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:33:10" (1/3) ... [2020-11-30 01:33:13,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fc77a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:33:13, skipping insertion in model container [2020-11-30 01:33:13,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:10" (2/3) ... [2020-11-30 01:33:13,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fc77a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:33:13, skipping insertion in model container [2020-11-30 01:33:13,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:33:13" (3/3) ... [2020-11-30 01:33:13,543 INFO L111 eAbstractionObserver]: Analyzing ICFG square_1.i [2020-11-30 01:33:13,557 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:33:13,562 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:33:13,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:33:13,609 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:33:13,610 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:33:13,610 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:33:13,610 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:33:13,611 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:33:13,611 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:33:13,611 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:33:13,612 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:33:13,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-30 01:33:13,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:33:13,634 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:33:13,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:33:13,635 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:33:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:13,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-11-30 01:33:13,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-30 01:33:13,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308743804] [2020-11-30 01:33:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/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 [2020-11-30 01:33:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:14,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 01:33:14,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:14,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:33:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:14,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308743804] [2020-11-30 01:33:14,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:33:14,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 01:33:14,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788998976] [2020-11-30 01:33:14,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:33:14,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-30 01:33:14,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:33:14,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:33:14,460 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-30 01:33:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:33:14,476 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-30 01:33:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:33:14,478 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-30 01:33:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:33:14,487 INFO L225 Difference]: With dead ends: 21 [2020-11-30 01:33:14,487 INFO L226 Difference]: Without dead ends: 8 [2020-11-30 01:33:14,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:33:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-30 01:33:14,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-30 01:33:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 01:33:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-11-30 01:33:14,526 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-11-30 01:33:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:33:14,527 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-11-30 01:33:14,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:33:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-11-30 01:33:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:33:14,528 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:33:14,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:33:14,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 01:33:14,742 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:33:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:14,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-11-30 01:33:14,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-30 01:33:14,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525019378] [2020-11-30 01:33:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/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 [2020-11-30 01:34:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:34:38,723 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:35:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:35:53,539 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:35:53,678 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-30 01:35:53,678 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:35:53,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 01:35:53,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:35:53 BoogieIcfgContainer [2020-11-30 01:35:53,909 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:35:53,910 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:35:53,910 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:35:53,910 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:35:53,911 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:33:13" (3/4) ... [2020-11-30 01:35:53,913 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:35:53,957 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a4d744b4-7516-4625-ae73-9b5980c71952/bin/uautomizer/witness.graphml [2020-11-30 01:35:53,958 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:35:53,960 INFO L168 Benchmark]: Toolchain (without parser) took 163523.77 ms. Allocated memory is still 67.1 MB. Free memory was 47.9 MB in the beginning and 31.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:35:53,961 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 67.1 MB. Free memory was 48.2 MB in the beginning and 48.2 MB in the end (delta: 28.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:35:53,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.57 ms. Allocated memory is still 67.1 MB. Free memory was 47.8 MB in the beginning and 37.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:35:53,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 120.38 ms. Allocated memory is still 67.1 MB. Free memory was 37.6 MB in the beginning and 50.4 MB in the end (delta: -12.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:35:53,964 INFO L168 Benchmark]: Boogie Preprocessor took 42.70 ms. Allocated memory is still 67.1 MB. Free memory was 50.4 MB in the beginning and 49.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:35:53,965 INFO L168 Benchmark]: RCFGBuilder took 2519.36 ms. Allocated memory is still 67.1 MB. Free memory was 49.2 MB in the beginning and 38.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:35:53,966 INFO L168 Benchmark]: TraceAbstraction took 160374.89 ms. Allocated memory is still 67.1 MB. Free memory was 38.1 MB in the beginning and 33.2 MB in the end (delta: 4.9 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:35:53,966 INFO L168 Benchmark]: Witness Printer took 48.25 ms. Allocated memory is still 67.1 MB. Free memory was 33.2 MB in the beginning and 31.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:35:53,970 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 67.1 MB. Free memory was 48.2 MB in the beginning and 48.2 MB in the end (delta: 28.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 408.57 ms. Allocated memory is still 67.1 MB. Free memory was 47.8 MB in the beginning and 37.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 120.38 ms. Allocated memory is still 67.1 MB. Free memory was 37.6 MB in the beginning and 50.4 MB in the end (delta: -12.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.70 ms. Allocated memory is still 67.1 MB. Free memory was 50.4 MB in the beginning and 49.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2519.36 ms. Allocated memory is still 67.1 MB. Free memory was 49.2 MB in the beginning and 38.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 160374.89 ms. Allocated memory is still 67.1 MB. Free memory was 38.1 MB in the beginning and 33.2 MB in the end (delta: 4.9 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Witness Printer took 48.25 ms. Allocated memory is still 67.1 MB. Free memory was 33.2 MB in the beginning and 31.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.39f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_1.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 160.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 12 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, 84.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 72 SizeOfPredicates, 0 NumberOfNonLiveVariables, 27 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...