./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38561929b5142acce65cab4da64e7c4ae5f17524 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38561929b5142acce65cab4da64e7c4ae5f17524 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 [2020-10-24 23:26:57,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:26:57,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:26:57,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:26:57,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:26:57,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:26:57,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:26:57,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:26:57,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:26:57,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:26:57,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:26:57,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:26:57,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:26:57,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:26:57,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:26:57,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:26:57,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:26:57,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:26:57,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:26:57,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:26:57,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:26:57,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:26:57,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:26:57,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:26:57,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:26:57,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:26:57,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:26:57,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:26:57,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:26:57,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:26:57,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:26:57,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:26:57,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:26:57,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:26:57,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:26:57,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:26:57,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:26:57,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:26:57,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:26:57,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:26:57,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:26:57,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 23:26:57,478 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:26:57,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:26:57,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:26:57,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:26:57,481 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:26:57,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:26:57,482 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:26:57,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 23:26:57,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:26:57,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:26:57,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:26:57,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:26:57,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:26:57,483 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:26:57,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:26:57,484 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:26:57,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:26:57,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:26:57,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:26:57,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:26:57,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:26:57,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:26:57,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:26:57,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:26:57,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:26:57,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 23:26:57,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 23:26:57,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:26:57,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:26:57,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-10-24 23:26:57,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:26:57,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:26:57,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:26:57,919 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:26:57,921 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:26:57,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-24 23:26:58,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22843159/f1daa5d431ea4a5ea9476f30f6b525e6/FLAG55b602f5d [2020-10-24 23:26:58,744 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:26:58,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-24 23:26:58,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22843159/f1daa5d431ea4a5ea9476f30f6b525e6/FLAG55b602f5d [2020-10-24 23:26:59,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22843159/f1daa5d431ea4a5ea9476f30f6b525e6 [2020-10-24 23:26:59,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:26:59,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:26:59,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:26:59,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:26:59,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:26:59,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@206188e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59, skipping insertion in model container [2020-10-24 23:26:59,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:26:59,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:26:59,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:26:59,407 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:26:59,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:26:59,456 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:26:59,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59 WrapperNode [2020-10-24 23:26:59,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:26:59,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:26:59,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:26:59,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:26:59,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:26:59,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:26:59,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:26:59,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:26:59,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... [2020-10-24 23:26:59,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:26:59,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:26:59,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:26:59,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:26:59,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:26:59,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 23:26:59,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:26:59,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-24 23:26:59,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:26:59,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:26:59,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 23:26:59,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:27:00,391 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:27:00,392 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-24 23:27:00,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:00 BoogieIcfgContainer [2020-10-24 23:27:00,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:27:00,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:27:00,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:27:00,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:27:00,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:26:59" (1/3) ... [2020-10-24 23:27:00,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750473b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:00, skipping insertion in model container [2020-10-24 23:27:00,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:26:59" (2/3) ... [2020-10-24 23:27:00,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750473b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:00, skipping insertion in model container [2020-10-24 23:27:00,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:00" (3/3) ... [2020-10-24 23:27:00,409 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-10-24 23:27:00,422 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:27:00,427 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:27:00,444 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:27:00,490 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:27:00,491 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:27:00,491 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:27:00,491 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:27:00,492 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:27:00,492 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:27:00,492 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:27:00,493 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:27:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-24 23:27:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:27:00,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:00,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:00,520 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:00,527 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-24 23:27:00,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:00,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383315329] [2020-10-24 23:27:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:00,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383315329] [2020-10-24 23:27:00,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:00,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 23:27:00,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451333038] [2020-10-24 23:27:00,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:27:00,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:27:00,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:00,731 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-24 23:27:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:00,757 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-24 23:27:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:27:00,759 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:27:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:00,770 INFO L225 Difference]: With dead ends: 63 [2020-10-24 23:27:00,771 INFO L226 Difference]: Without dead ends: 29 [2020-10-24 23:27:00,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-24 23:27:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-24 23:27:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-24 23:27:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-24 23:27:00,818 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-24 23:27:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:00,819 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-24 23:27:00,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:27:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-24 23:27:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:27:00,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:00,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:00,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 23:27:00,822 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:00,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-24 23:27:00,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:00,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316764763] [2020-10-24 23:27:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:00,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316764763] [2020-10-24 23:27:00,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:00,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:00,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343904278] [2020-10-24 23:27:00,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:00,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:00,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:00,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:00,930 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-24 23:27:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:01,030 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-24 23:27:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:01,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-24 23:27:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:01,033 INFO L225 Difference]: With dead ends: 53 [2020-10-24 23:27:01,033 INFO L226 Difference]: Without dead ends: 44 [2020-10-24 23:27:01,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-24 23:27:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-10-24 23:27:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:01,041 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-24 23:27:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:01,042 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:01,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-24 23:27:01,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:01,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:01,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 23:27:01,043 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:01,044 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-10-24 23:27:01,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:01,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281552043] [2020-10-24 23:27:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:01,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281552043] [2020-10-24 23:27:01,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:01,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:01,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852190553] [2020-10-24 23:27:01,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:01,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:01,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:01,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:01,151 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:27:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:01,253 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-24 23:27:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:01,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-24 23:27:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:01,255 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:27:01,255 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 23:27:01,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 23:27:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-24 23:27:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:01,262 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-10-24 23:27:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:01,263 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:01,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-24 23:27:01,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:01,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:01,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 23:27:01,264 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:01,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-10-24 23:27:01,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:01,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140652185] [2020-10-24 23:27:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:01,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140652185] [2020-10-24 23:27:01,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:01,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:01,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735754038] [2020-10-24 23:27:01,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:01,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:01,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:01,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:01,368 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:27:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:01,502 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-24 23:27:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:01,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-24 23:27:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:01,504 INFO L225 Difference]: With dead ends: 57 [2020-10-24 23:27:01,504 INFO L226 Difference]: Without dead ends: 48 [2020-10-24 23:27:01,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-24 23:27:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-24 23:27:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:01,511 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-10-24 23:27:01,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:01,511 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:01,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:01,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:01,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:01,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 23:27:01,513 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:01,514 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-10-24 23:27:01,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:01,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750823505] [2020-10-24 23:27:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:01,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750823505] [2020-10-24 23:27:01,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:01,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:27:01,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292975675] [2020-10-24 23:27:01,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:01,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:27:01,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:01,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:01,619 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:27:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:01,703 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-24 23:27:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:01,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-24 23:27:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:01,705 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:27:01,705 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 23:27:01,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 23:27:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-24 23:27:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:01,711 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-10-24 23:27:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:01,711 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:01,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:01,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:01,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:01,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 23:27:01,713 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:01,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-24 23:27:01,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:27:01,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150928244] [2020-10-24 23:27:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:27:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:01,737 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:01,774 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:01,811 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 23:27:01,811 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:27:01,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 23:27:01,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:27:01 BoogieIcfgContainer [2020-10-24 23:27:01,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:27:01,847 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:27:01,847 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:27:01,848 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:27:01,848 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:00" (3/4) ... [2020-10-24 23:27:01,852 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 23:27:01,852 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:27:01,855 INFO L168 Benchmark]: Toolchain (without parser) took 2733.19 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 32.3 MB in the beginning and 51.4 MB in the end (delta: -19.1 MB). Peak memory consumption was 220.1 kB. Max. memory is 16.1 GB. [2020-10-24 23:27:01,856 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 37.7 MB. Free memory was 20.2 MB in the beginning and 20.2 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:01,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.16 ms. Allocated memory is still 54.5 MB. Free memory was 31.7 MB in the beginning and 36.6 MB in the end (delta: -4.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:01,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.86 ms. Allocated memory is still 54.5 MB. Free memory was 36.6 MB in the beginning and 34.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:01,859 INFO L168 Benchmark]: Boogie Preprocessor took 35.77 ms. Allocated memory is still 54.5 MB. Free memory was 34.8 MB in the beginning and 33.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:01,859 INFO L168 Benchmark]: RCFGBuilder took 851.12 ms. Allocated memory is still 54.5 MB. Free memory was 33.4 MB in the beginning and 29.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:01,860 INFO L168 Benchmark]: TraceAbstraction took 1446.85 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 29.1 MB in the beginning and 51.4 MB in the end (delta: -22.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:01,861 INFO L168 Benchmark]: Witness Printer took 5.13 ms. Allocated memory is still 71.3 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:01,866 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 37.7 MB. Free memory was 20.2 MB in the beginning and 20.2 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.16 ms. Allocated memory is still 54.5 MB. Free memory was 31.7 MB in the beginning and 36.6 MB in the end (delta: -4.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.86 ms. Allocated memory is still 54.5 MB. Free memory was 36.6 MB in the beginning and 34.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.77 ms. Allocated memory is still 54.5 MB. Free memory was 34.8 MB in the beginning and 33.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 851.12 ms. Allocated memory is still 54.5 MB. Free memory was 33.4 MB in the beginning and 29.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1446.85 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 29.1 MB in the beginning and 51.4 MB in the end (delta: -22.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. * Witness Printer took 5.13 ms. Allocated memory is still 71.3 MB. Free memory is still 51.4 MB. 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 someBinaryFLOATComparisonOperation at line 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L3] __assert_fail("0", "float_req_bl_1232b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 [2020-10-24 23:27:04,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:27:04,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:27:04,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:27:04,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:27:04,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:27:04,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:27:04,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:27:04,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:27:04,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:27:04,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:27:04,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:27:04,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:27:04,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:27:04,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:27:04,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:27:04,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:27:04,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:27:04,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:27:04,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:27:04,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:27:04,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:27:04,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:27:04,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:27:04,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:27:04,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:27:04,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:27:04,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:27:04,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:27:04,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:27:04,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:27:04,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:27:04,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:27:04,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:27:04,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:27:04,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:27:04,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:27:04,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:27:04,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:27:04,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:27:04,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:27:04,723 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 23:27:04,785 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:27:04,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:27:04,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:27:04,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:27:04,791 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:27:04,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:27:04,792 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:27:04,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:27:04,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:27:04,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:27:04,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:27:04,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:27:04,795 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 23:27:04,795 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 23:27:04,795 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:27:04,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:27:04,796 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:27:04,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:27:04,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:27:04,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:27:04,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:27:04,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:27:04,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:27:04,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:27:04,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:27:04,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:27:04,799 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 23:27:04,799 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 23:27:04,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:27:04,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:27:04,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 23:27:04,800 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-10-24 23:27:05,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:27:05,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:27:05,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:27:05,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:27:05,313 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:27:05,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-24 23:27:05,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45baf1537/78616d4bd0d2420fb6be201a795d87ec/FLAGcafbdb560 [2020-10-24 23:27:05,916 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:27:05,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-24 23:27:05,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45baf1537/78616d4bd0d2420fb6be201a795d87ec/FLAGcafbdb560 [2020-10-24 23:27:06,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45baf1537/78616d4bd0d2420fb6be201a795d87ec [2020-10-24 23:27:06,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:27:06,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:27:06,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:06,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:27:06,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:27:06,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ec0358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06, skipping insertion in model container [2020-10-24 23:27:06,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:27:06,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:27:06,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:06,662 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:27:06,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:27:06,765 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:27:06,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06 WrapperNode [2020-10-24 23:27:06,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:27:06,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:06,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:27:06,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:27:06,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:27:06,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:27:06,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:27:06,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:27:06,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (1/1) ... [2020-10-24 23:27:06,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:27:06,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:27:06,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:27:06,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:27:06,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:27:07,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 23:27:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:27:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-24 23:27:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:27:07,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:27:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-24 23:27:07,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:27:07,689 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:27:07,689 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-24 23:27:07,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:07 BoogieIcfgContainer [2020-10-24 23:27:07,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:27:07,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:27:07,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:27:07,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:27:07,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:27:06" (1/3) ... [2020-10-24 23:27:07,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17608bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:07, skipping insertion in model container [2020-10-24 23:27:07,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:27:06" (2/3) ... [2020-10-24 23:27:07,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17608bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:27:07, skipping insertion in model container [2020-10-24 23:27:07,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:07" (3/3) ... [2020-10-24 23:27:07,701 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-10-24 23:27:07,714 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:27:07,722 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:27:07,736 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:27:07,765 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:27:07,765 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:27:07,765 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:27:07,766 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:27:07,766 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:27:07,766 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:27:07,766 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:27:07,766 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:27:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-24 23:27:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:27:07,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:07,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:07,788 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-24 23:27:07,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:07,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954992709] [2020-10-24 23:27:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:07,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 23:27:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:07,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:07,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954992709] [2020-10-24 23:27:07,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:07,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 23:27:07,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921328883] [2020-10-24 23:27:07,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:27:07,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:07,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:27:07,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:07,966 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-24 23:27:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:07,988 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-24 23:27:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:27:07,990 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:27:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:08,001 INFO L225 Difference]: With dead ends: 63 [2020-10-24 23:27:08,001 INFO L226 Difference]: Without dead ends: 29 [2020-10-24 23:27:08,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:27:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-24 23:27:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-24 23:27:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-24 23:27:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-24 23:27:08,044 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-24 23:27:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:08,045 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-24 23:27:08,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:27:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-24 23:27:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:27:08,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:08,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:08,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 23:27:08,264 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-24 23:27:08,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:08,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852640523] [2020-10-24 23:27:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:08,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:27:08,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:08,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:08,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852640523] [2020-10-24 23:27:08,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:08,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:27:08,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909476501] [2020-10-24 23:27:08,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:27:08,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:08,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:27:08,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:27:08,432 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-10-24 23:27:08,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:08,603 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-24 23:27:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:08,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-24 23:27:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:08,606 INFO L225 Difference]: With dead ends: 68 [2020-10-24 23:27:08,607 INFO L226 Difference]: Without dead ends: 59 [2020-10-24 23:27:08,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-24 23:27:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-24 23:27:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-24 23:27:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 23:27:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-24 23:27:08,617 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-24 23:27:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:08,617 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-24 23:27:08,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:27:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-24 23:27:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:27:08,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:08,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:08,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 23:27:08,842 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:08,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-24 23:27:08,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:08,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604270544] [2020-10-24 23:27:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:08,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-24 23:27:08,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:08,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:09,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604270544] [2020-10-24 23:27:09,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:09,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-24 23:27:09,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099074777] [2020-10-24 23:27:09,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:09,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:09,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:09,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:09,077 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-24 23:27:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:09,273 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-24 23:27:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:27:09,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-24 23:27:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:09,275 INFO L225 Difference]: With dead ends: 52 [2020-10-24 23:27:09,275 INFO L226 Difference]: Without dead ends: 26 [2020-10-24 23:27:09,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-24 23:27:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-24 23:27:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-24 23:27:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-24 23:27:09,281 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-10-24 23:27:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:09,282 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-24 23:27:09,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-24 23:27:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-24 23:27:09,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:09,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:09,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-24 23:27:09,502 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:09,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-10-24 23:27:09,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:09,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326376494] [2020-10-24 23:27:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:09,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:27:09,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:09,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:09,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326376494] [2020-10-24 23:27:09,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:09,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:27:09,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085993137] [2020-10-24 23:27:09,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:27:09,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:09,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:27:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:27:09,654 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-10-24 23:27:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:09,753 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-24 23:27:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:27:09,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-24 23:27:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:09,756 INFO L225 Difference]: With dead ends: 61 [2020-10-24 23:27:09,756 INFO L226 Difference]: Without dead ends: 52 [2020-10-24 23:27:09,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-24 23:27:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-24 23:27:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-10-24 23:27:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:27:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-24 23:27:09,763 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-10-24 23:27:09,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:09,764 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-24 23:27:09,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:27:09,764 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-24 23:27:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 23:27:09,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:09,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:09,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-24 23:27:09,984 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-10-24 23:27:09,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:09,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752210443] [2020-10-24 23:27:09,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:10,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-24 23:27:10,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:10,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:10,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752210443] [2020-10-24 23:27:10,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:10,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-24 23:27:10,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929569737] [2020-10-24 23:27:10,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:27:10,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:10,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:27:10,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:10,154 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-10-24 23:27:10,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:10,168 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-24 23:27:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 23:27:10,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-24 23:27:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:10,169 INFO L225 Difference]: With dead ends: 38 [2020-10-24 23:27:10,169 INFO L226 Difference]: Without dead ends: 28 [2020-10-24 23:27:10,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:27:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-24 23:27:10,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-24 23:27:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-24 23:27:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-24 23:27:10,175 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-24 23:27:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:10,175 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-24 23:27:10,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:27:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-24 23:27:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 23:27:10,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:10,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:10,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-24 23:27:10,388 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:10,389 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-10-24 23:27:10,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:10,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928215306] [2020-10-24 23:27:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:10,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-24 23:27:10,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:10,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:10,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928215306] [2020-10-24 23:27:10,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:10,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-24 23:27:10,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32225324] [2020-10-24 23:27:10,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 23:27:10,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:10,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 23:27:10,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-24 23:27:10,610 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-24 23:27:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:10,740 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-24 23:27:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 23:27:10,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-24 23:27:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:10,742 INFO L225 Difference]: With dead ends: 40 [2020-10-24 23:27:10,742 INFO L226 Difference]: Without dead ends: 37 [2020-10-24 23:27:10,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-24 23:27:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-24 23:27:10,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-24 23:27:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-24 23:27:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-24 23:27:10,748 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-10-24 23:27:10,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:10,748 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-24 23:27:10,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 23:27:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-24 23:27:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-24 23:27:10,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:10,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:10,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-24 23:27:10,963 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:10,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:10,964 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-10-24 23:27:10,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:10,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938072749] [2020-10-24 23:27:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:27:11,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-24 23:27:11,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:27:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:11,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:27:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:27:11,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938072749] [2020-10-24 23:27:11,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:27:11,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-24 23:27:11,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406824400] [2020-10-24 23:27:11,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 23:27:11,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:27:11,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 23:27:11,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 23:27:11,133 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-24 23:27:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:27:11,199 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-24 23:27:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 23:27:11,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-24 23:27:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:27:11,202 INFO L225 Difference]: With dead ends: 43 [2020-10-24 23:27:11,202 INFO L226 Difference]: Without dead ends: 23 [2020-10-24 23:27:11,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-24 23:27:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-24 23:27:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-24 23:27:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-24 23:27:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-24 23:27:11,213 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-10-24 23:27:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:27:11,213 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-24 23:27:11,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 23:27:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-24 23:27:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-24 23:27:11,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:27:11,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:27:11,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-24 23:27:11,428 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:27:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:27:11,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-10-24 23:27:11,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:27:11,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792700250] [2020-10-24 23:27:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-24 23:27:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:11,557 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:27:11,681 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:27:11,758 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-24 23:27:11,759 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:27:11,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-24 23:27:12,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:27:12 BoogieIcfgContainer [2020-10-24 23:27:12,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:27:12,017 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:27:12,017 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:27:12,017 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:27:12,018 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:27:07" (3/4) ... [2020-10-24 23:27:12,020 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-24 23:27:12,081 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 23:27:12,081 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:27:12,084 INFO L168 Benchmark]: Toolchain (without parser) took 5817.68 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 24.6 MB in the beginning and 26.7 MB in the end (delta: -2.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:12,084 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 41.9 MB. Free memory is still 27.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:12,085 INFO L168 Benchmark]: CACSL2BoogieTranslator took 495.40 ms. Allocated memory is still 41.9 MB. Free memory was 24.0 MB in the beginning and 19.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:12,086 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.85 ms. Allocated memory is still 41.9 MB. Free memory was 19.7 MB in the beginning and 17.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:27:12,087 INFO L168 Benchmark]: Boogie Preprocessor took 94.04 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 17.9 MB in the beginning and 34.5 MB in the end (delta: -16.6 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:12,088 INFO L168 Benchmark]: RCFGBuilder took 734.56 ms. Allocated memory is still 50.3 MB. Free memory was 34.5 MB in the beginning and 28.0 MB in the end (delta: 6.5 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:12,088 INFO L168 Benchmark]: TraceAbstraction took 4322.97 ms. Allocated memory is still 50.3 MB. Free memory was 27.5 MB in the beginning and 29.2 MB in the end (delta: -1.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:12,089 INFO L168 Benchmark]: Witness Printer took 64.65 ms. Allocated memory is still 50.3 MB. Free memory was 29.2 MB in the beginning and 26.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-24 23:27:12,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 41.9 MB. Free memory is still 27.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 495.40 ms. Allocated memory is still 41.9 MB. Free memory was 24.0 MB in the beginning and 19.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 92.85 ms. Allocated memory is still 41.9 MB. Free memory was 19.7 MB in the beginning and 17.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 94.04 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 17.9 MB in the beginning and 34.5 MB in the end (delta: -16.6 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * RCFGBuilder took 734.56 ms. Allocated memory is still 50.3 MB. Free memory was 34.5 MB in the beginning and 28.0 MB in the end (delta: 6.5 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4322.97 ms. Allocated memory is still 50.3 MB. Free memory was 27.5 MB in the beginning and 29.2 MB in the end (delta: -1.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. * Witness Printer took 64.65 ms. Allocated memory is still 50.3 MB. Free memory was 29.2 MB in the beginning and 26.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 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: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L38] COND FALSE !(__fpclassify_float(x) == 0) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] EXPR x < y ? x : y [L43] return x < y ? x : y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L47] __uint32_t w; [L50] ieee_float_shape_type gf_u; [L51] gf_u.value = (x) [L52] EXPR gf_u.word [L52] (w) = gf_u.word [L55] return (w & 0x80000000) != 0; [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L3] __assert_fail("0", "float_req_bl_1232b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 175 SDslu, 301 SDs, 0 SdLazy, 100 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7783 SizeOfPredicates, 27 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...