./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 54858612 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 0.2.0-5485861 [2020-10-25 22:01:16,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:01:16,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:01:16,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:01:16,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:01:16,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:01:16,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:01:16,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:01:16,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:01:16,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:01:16,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:01:16,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:01:16,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:01:16,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:01:16,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:01:16,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:01:16,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:01:16,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:01:16,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:01:16,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:01:16,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:01:16,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:01:16,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:01:16,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:01:16,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:01:16,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:01:16,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:01:16,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:01:16,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:01:16,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:01:16,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:01:16,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:01:16,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:01:16,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:01:16,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:01:16,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:01:16,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:01:16,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:01:16,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:01:16,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:01:16,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:01:16,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:01:16,459 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:01:16,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:01:16,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:01:16,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:01:16,462 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:01:16,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:01:16,462 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:01:16,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:01:16,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:01:16,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:01:16,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:01:16,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:01:16,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:01:16,464 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:01:16,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:01:16,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:01:16,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:01:16,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:01:16,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:01:16,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:01:16,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:01:16,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:01:16,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:01:16,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:01:16,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:01:16,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:01:16,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:01:16,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:01:16,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:01:16,468 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-10-25 22:01:16,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:01:16,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:01:16,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:01:16,908 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:01:16,909 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:01:16,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-25 22:01:16,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c058b9e/f921a13936de44fbb669fe2b0913af20/FLAG8ee22a6df [2020-10-25 22:01:17,703 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:01:17,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-25 22:01:17,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c058b9e/f921a13936de44fbb669fe2b0913af20/FLAG8ee22a6df [2020-10-25 22:01:18,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c058b9e/f921a13936de44fbb669fe2b0913af20 [2020-10-25 22:01:18,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:01:18,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:01:18,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:18,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:01:18,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:01:18,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2102f92d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18, skipping insertion in model container [2020-10-25 22:01:18,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:01:18,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:01:18,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:18,450 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:01:18,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:18,520 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:01:18,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18 WrapperNode [2020-10-25 22:01:18,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:18,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:18,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:01:18,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:01:18,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:18,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:01:18,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:01:18,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:01:18,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (1/1) ... [2020-10-25 22:01:18,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:01:18,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:01:18,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:01:18,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:01:18,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (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 [2020-10-25 22:01:18,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:01:18,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:01:18,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-25 22:01:18,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:01:18,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:01:18,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 22:01:18,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:01:19,257 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:01:19,257 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-25 22:01:19,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:19 BoogieIcfgContainer [2020-10-25 22:01:19,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:01:19,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:01:19,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:01:19,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:01:19,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:01:18" (1/3) ... [2020-10-25 22:01:19,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f89947e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:19, skipping insertion in model container [2020-10-25 22:01:19,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:18" (2/3) ... [2020-10-25 22:01:19,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f89947e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:19, skipping insertion in model container [2020-10-25 22:01:19,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:19" (3/3) ... [2020-10-25 22:01:19,269 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-10-25 22:01:19,283 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:01:19,289 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:01:19,304 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:01:19,342 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:01:19,342 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:01:19,342 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:01:19,342 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:01:19,343 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:01:19,343 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:01:19,343 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:01:19,343 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:01:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-25 22:01:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 22:01:19,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:19,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:19,366 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-25 22:01:19,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:19,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996984076] [2020-10-25 22:01:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:19,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996984076] [2020-10-25 22:01:19,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:19,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:01:19,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020044273] [2020-10-25 22:01:19,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:01:19,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:19,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:01:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:01:19,577 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-25 22:01:19,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:19,601 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-25 22:01:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:01:19,603 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-25 22:01:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:19,615 INFO L225 Difference]: With dead ends: 63 [2020-10-25 22:01:19,616 INFO L226 Difference]: Without dead ends: 29 [2020-10-25 22:01:19,619 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 [2020-10-25 22:01:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-25 22:01:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-25 22:01:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-25 22:01:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-25 22:01:19,660 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-25 22:01:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:19,661 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-25 22:01:19,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:01:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-25 22:01:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:01:19,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:19,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:19,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:01:19,663 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:19,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:19,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-25 22:01:19,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:19,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334736656] [2020-10-25 22:01:19,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:19,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334736656] [2020-10-25 22:01:19,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:19,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:01:19,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570257640] [2020-10-25 22:01:19,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:19,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:19,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:19,782 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-25 22:01:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:19,894 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-25 22:01:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:19,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-25 22:01:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:19,897 INFO L225 Difference]: With dead ends: 53 [2020-10-25 22:01:19,897 INFO L226 Difference]: Without dead ends: 44 [2020-10-25 22:01:19,899 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 [2020-10-25 22:01:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-25 22:01:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-10-25 22:01:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:01:19,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-25 22:01:19,907 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-25 22:01:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:19,907 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-25 22:01:19,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-25 22:01:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 22:01:19,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:19,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:19,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:01:19,909 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:19,910 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-10-25 22:01:19,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:19,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050909036] [2020-10-25 22:01:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:19,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050909036] [2020-10-25 22:01:19,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:19,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:01:19,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722968460] [2020-10-25 22:01:19,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:19,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:19,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:19,990 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-25 22:01:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:20,141 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-25 22:01:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:20,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-25 22:01:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:20,145 INFO L225 Difference]: With dead ends: 55 [2020-10-25 22:01:20,146 INFO L226 Difference]: Without dead ends: 46 [2020-10-25 22:01:20,146 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 [2020-10-25 22:01:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-25 22:01:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-25 22:01:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:01:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-25 22:01:20,160 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-10-25 22:01:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:20,161 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-25 22:01:20,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-25 22:01:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-25 22:01:20,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:20,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:20,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 22:01:20,165 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:20,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-10-25 22:01:20,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:20,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536749767] [2020-10-25 22:01:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:20,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536749767] [2020-10-25 22:01:20,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:20,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:01:20,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794226073] [2020-10-25 22:01:20,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:20,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:20,264 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-25 22:01:20,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:20,369 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-25 22:01:20,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:20,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-25 22:01:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:20,372 INFO L225 Difference]: With dead ends: 57 [2020-10-25 22:01:20,372 INFO L226 Difference]: Without dead ends: 48 [2020-10-25 22:01:20,372 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 [2020-10-25 22:01:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-25 22:01:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-25 22:01:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:01:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-25 22:01:20,379 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-10-25 22:01:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:20,380 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-25 22:01:20,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-25 22:01:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 22:01:20,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:20,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:20,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-25 22:01:20,382 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:20,383 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-10-25 22:01:20,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:20,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614162167] [2020-10-25 22:01:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:20,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614162167] [2020-10-25 22:01:20,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:20,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:01:20,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019625716] [2020-10-25 22:01:20,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:20,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:01:20,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:20,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:20,456 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-25 22:01:20,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:20,555 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-25 22:01:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:20,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-25 22:01:20,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:20,558 INFO L225 Difference]: With dead ends: 55 [2020-10-25 22:01:20,558 INFO L226 Difference]: Without dead ends: 46 [2020-10-25 22:01:20,559 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 [2020-10-25 22:01:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-25 22:01:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-25 22:01:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:01:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-25 22:01:20,567 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-10-25 22:01:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:20,567 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-25 22:01:20,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:20,568 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-25 22:01:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 22:01:20,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:20,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:20,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 22:01:20,570 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:20,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-25 22:01:20,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:01:20,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270579467] [2020-10-25 22:01:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:01:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:01:20,611 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:01:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:01:20,658 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:01:20,684 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:01:20,684 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:01:20,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-25 22:01:20,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:01:20 BoogieIcfgContainer [2020-10-25 22:01:20,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:01:20,725 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:01:20,725 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:01:20,726 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:01:20,726 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:19" (3/4) ... [2020-10-25 22:01:20,735 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 22:01:20,735 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:01:20,739 INFO L168 Benchmark]: Toolchain (without parser) took 2669.22 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 20.6 MB in the beginning and 34.0 MB in the end (delta: -13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:20,741 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 35.7 MB. Free memory is still 19.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:20,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 442.91 ms. Allocated memory is still 44.0 MB. Free memory was 20.1 MB in the beginning and 19.1 MB in the end (delta: 998.7 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:20,743 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.34 ms. Allocated memory is still 44.0 MB. Free memory was 19.1 MB in the beginning and 27.1 MB in the end (delta: -8.0 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:20,745 INFO L168 Benchmark]: Boogie Preprocessor took 79.36 ms. Allocated memory is still 44.0 MB. Free memory was 27.1 MB in the beginning and 25.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:20,749 INFO L168 Benchmark]: RCFGBuilder took 569.51 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 25.6 MB in the beginning and 26.5 MB in the end (delta: -897.4 kB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:20,750 INFO L168 Benchmark]: TraceAbstraction took 1462.28 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 26.0 MB in the beginning and 34.5 MB in the end (delta: -8.5 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:20,752 INFO L168 Benchmark]: Witness Printer took 9.51 ms. Allocated memory is still 67.1 MB. Free memory is still 34.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:20,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 35.7 MB. Free memory is still 19.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 442.91 ms. Allocated memory is still 44.0 MB. Free memory was 20.1 MB in the beginning and 19.1 MB in the end (delta: 998.7 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 85.34 ms. Allocated memory is still 44.0 MB. Free memory was 19.1 MB in the beginning and 27.1 MB in the end (delta: -8.0 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.36 ms. Allocated memory is still 44.0 MB. Free memory was 27.1 MB in the beginning and 25.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 569.51 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 25.6 MB in the beginning and 26.5 MB in the end (delta: -897.4 kB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1462.28 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 26.0 MB in the beginning and 34.5 MB in the end (delta: -8.5 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. * Witness Printer took 9.51 ms. Allocated memory is still 67.1 MB. Free memory is still 34.0 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: 0.5s, 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, 0.2s 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 0.2.0-5485861 [2020-10-25 22:01:23,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:01:23,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:01:23,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:01:23,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:01:23,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:01:23,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:01:23,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:01:23,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:01:23,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:01:23,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:01:23,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:01:23,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:01:23,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:01:23,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:01:23,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:01:23,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:01:23,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:01:23,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:01:23,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:01:23,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:01:23,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:01:23,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:01:23,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:01:23,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:01:23,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:01:23,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:01:23,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:01:23,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:01:23,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:01:23,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:01:23,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:01:23,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:01:23,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:01:23,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:01:23,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:01:23,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:01:23,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:01:23,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:01:23,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:01:23,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:01:23,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 22:01:23,747 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:01:23,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:01:23,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:01:23,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:01:23,752 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:01:23,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:01:23,752 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:01:23,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:01:23,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:01:23,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:01:23,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:01:23,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:01:23,755 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 22:01:23,755 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 22:01:23,755 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:01:23,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:01:23,755 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:01:23,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:01:23,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:01:23,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:01:23,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:01:23,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:01:23,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:01:23,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:01:23,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:01:23,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:01:23,758 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 22:01:23,758 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 22:01:23,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:01:23,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:01:23,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 22:01:23,759 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-10-25 22:01:24,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:01:24,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:01:24,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:01:24,292 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:01:24,292 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:01:24,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-25 22:01:24,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c70ce9a/ad3b96197f1c47e592f4299a0888c7fc/FLAG6e42182ea [2020-10-25 22:01:25,072 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:01:25,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-25 22:01:25,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c70ce9a/ad3b96197f1c47e592f4299a0888c7fc/FLAG6e42182ea [2020-10-25 22:01:25,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c70ce9a/ad3b96197f1c47e592f4299a0888c7fc [2020-10-25 22:01:25,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:01:25,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:01:25,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:25,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:01:25,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:01:25,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74153750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25, skipping insertion in model container [2020-10-25 22:01:25,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:01:25,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:01:25,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:25,725 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:01:25,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:01:25,817 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:01:25,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25 WrapperNode [2020-10-25 22:01:25,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:01:25,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:25,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:01:25,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:01:25,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:01:25,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:01:25,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:01:25,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:01:25,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (1/1) ... [2020-10-25 22:01:25,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:01:25,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:01:25,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:01:25,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:01:25,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (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 [2020-10-25 22:01:26,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 22:01:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:01:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-25 22:01:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:01:26,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:01:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-25 22:01:26,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:01:26,581 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:01:26,581 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-25 22:01:26,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:26 BoogieIcfgContainer [2020-10-25 22:01:26,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:01:26,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:01:26,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:01:26,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:01:26,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:01:25" (1/3) ... [2020-10-25 22:01:26,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a04a772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:26, skipping insertion in model container [2020-10-25 22:01:26,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:01:25" (2/3) ... [2020-10-25 22:01:26,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a04a772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:01:26, skipping insertion in model container [2020-10-25 22:01:26,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:26" (3/3) ... [2020-10-25 22:01:26,596 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-10-25 22:01:26,610 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:01:26,617 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:01:26,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:01:26,661 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:01:26,661 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:01:26,662 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:01:26,662 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:01:26,662 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:01:26,662 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:01:26,663 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:01:26,663 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:01:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-25 22:01:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 22:01:26,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:26,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:26,688 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:26,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:26,696 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-25 22:01:26,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:26,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787958730] [2020-10-25 22:01:26,713 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 [2020-10-25 22:01:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:26,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-25 22:01:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:26,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:26,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787958730] [2020-10-25 22:01:26,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:26,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-25 22:01:26,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47399221] [2020-10-25 22:01:26,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:01:26,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:26,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:01:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:01:26,978 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-25 22:01:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:27,001 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-25 22:01:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:01:27,003 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-25 22:01:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:27,014 INFO L225 Difference]: With dead ends: 63 [2020-10-25 22:01:27,014 INFO L226 Difference]: Without dead ends: 29 [2020-10-25 22:01:27,018 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 [2020-10-25 22:01:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-25 22:01:27,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-25 22:01:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-25 22:01:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-25 22:01:27,058 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-25 22:01:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:27,058 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-25 22:01:27,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:01:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-25 22:01:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:01:27,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:27,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:27,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 22:01:27,273 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-25 22:01:27,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:27,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286798014] [2020-10-25 22:01:27,278 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 [2020-10-25 22:01:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:27,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 22:01:27,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:27,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:27,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286798014] [2020-10-25 22:01:27,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:27,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-25 22:01:27,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158699314] [2020-10-25 22:01:27,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:01:27,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:27,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:01:27,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:01:27,527 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-10-25 22:01:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:27,681 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-25 22:01:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:01:27,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-25 22:01:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:27,688 INFO L225 Difference]: With dead ends: 68 [2020-10-25 22:01:27,688 INFO L226 Difference]: Without dead ends: 59 [2020-10-25 22:01:27,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:01:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-25 22:01:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-25 22:01:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:01:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-25 22:01:27,700 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-25 22:01:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:27,700 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-25 22:01:27,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:01:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-25 22:01:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 22:01:27,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:27,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:27,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 22:01:27,919 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-25 22:01:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:27,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789787585] [2020-10-25 22:01:27,922 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 [2020-10-25 22:01:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 22:01:28,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:28,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:28,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789787585] [2020-10-25 22:01:28,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:28,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-25 22:01:28,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521029871] [2020-10-25 22:01:28,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:28,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:28,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:28,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:28,102 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-25 22:01:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:28,178 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-25 22:01:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:01:28,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-25 22:01:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:28,179 INFO L225 Difference]: With dead ends: 52 [2020-10-25 22:01:28,180 INFO L226 Difference]: Without dead ends: 26 [2020-10-25 22:01:28,180 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 [2020-10-25 22:01:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-25 22:01:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-25 22:01:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 22:01:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-25 22:01:28,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-10-25 22:01:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:28,187 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-25 22:01:28,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-25 22:01:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 22:01:28,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:28,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:28,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-25 22:01:28,401 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:28,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-10-25 22:01:28,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:28,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009563730] [2020-10-25 22:01:28,403 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 [2020-10-25 22:01:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:28,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 22:01:28,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:28,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:28,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009563730] [2020-10-25 22:01:28,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:28,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-25 22:01:28,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494109278] [2020-10-25 22:01:28,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:01:28,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:28,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:01:28,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:01:28,543 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-10-25 22:01:28,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:28,632 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-25 22:01:28,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:01:28,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-25 22:01:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:28,634 INFO L225 Difference]: With dead ends: 61 [2020-10-25 22:01:28,634 INFO L226 Difference]: Without dead ends: 52 [2020-10-25 22:01:28,635 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 [2020-10-25 22:01:28,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-25 22:01:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-10-25 22:01:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 22:01:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-25 22:01:28,643 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-10-25 22:01:28,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:28,643 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-25 22:01:28,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:01:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-25 22:01:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 22:01:28,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:28,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:28,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-25 22:01:28,864 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-10-25 22:01:28,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:28,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946661263] [2020-10-25 22:01:28,866 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 [2020-10-25 22:01:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:28,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:01:28,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:28,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:29,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946661263] [2020-10-25 22:01:29,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:29,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-25 22:01:29,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932948872] [2020-10-25 22:01:29,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:01:29,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:29,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:01:29,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:01:29,034 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-10-25 22:01:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:29,061 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-25 22:01:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:01:29,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-25 22:01:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:29,065 INFO L225 Difference]: With dead ends: 38 [2020-10-25 22:01:29,065 INFO L226 Difference]: Without dead ends: 28 [2020-10-25 22:01:29,066 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 [2020-10-25 22:01:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-25 22:01:29,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-25 22:01:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 22:01:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-25 22:01:29,082 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-25 22:01:29,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:29,083 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-25 22:01:29,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:01:29,083 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-25 22:01:29,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 22:01:29,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:29,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:29,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-25 22:01:29,299 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-10-25 22:01:29,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:29,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705144317] [2020-10-25 22:01:29,301 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 [2020-10-25 22:01:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:29,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 22:01:29,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:29,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:29,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705144317] [2020-10-25 22:01:29,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:29,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-25 22:01:29,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787294119] [2020-10-25 22:01:29,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:01:29,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:29,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:01:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:01:29,508 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-25 22:01:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:29,631 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-25 22:01:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:01:29,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-25 22:01:29,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:29,632 INFO L225 Difference]: With dead ends: 40 [2020-10-25 22:01:29,633 INFO L226 Difference]: Without dead ends: 37 [2020-10-25 22:01:29,633 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 [2020-10-25 22:01:29,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-25 22:01:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-25 22:01:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 22:01:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-25 22:01:29,639 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-10-25 22:01:29,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:29,640 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-25 22:01:29,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:01:29,640 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-25 22:01:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 22:01:29,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:29,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:01:29,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-25 22:01:29,857 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-10-25 22:01:29,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:29,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833881103] [2020-10-25 22:01:29,859 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 [2020-10-25 22:01:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:01:29,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 22:01:29,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:01:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:29,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:01:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:01:30,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833881103] [2020-10-25 22:01:30,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:01:30,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-25 22:01:30,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486857175] [2020-10-25 22:01:30,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 22:01:30,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:01:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 22:01:30,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:01:30,012 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-25 22:01:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:01:30,081 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-25 22:01:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:01:30,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-25 22:01:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:01:30,082 INFO L225 Difference]: With dead ends: 43 [2020-10-25 22:01:30,083 INFO L226 Difference]: Without dead ends: 23 [2020-10-25 22:01:30,084 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 [2020-10-25 22:01:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-25 22:01:30,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-25 22:01:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-25 22:01:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-25 22:01:30,088 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-10-25 22:01:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:01:30,089 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-25 22:01:30,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 22:01:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-25 22:01:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-25 22:01:30,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:01:30,090 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] [2020-10-25 22:01:30,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-25 22:01:30,291 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:01:30,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:01:30,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-10-25 22:01:30,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:01:30,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962782251] [2020-10-25 22:01:30,294 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 [2020-10-25 22:01:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:01:30,432 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:01:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:01:30,540 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:01:30,598 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-25 22:01:30,601 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:01:30,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-25 22:01:30,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:01:30 BoogieIcfgContainer [2020-10-25 22:01:30,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:01:30,873 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:01:30,873 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:01:30,873 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:01:30,874 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:01:26" (3/4) ... [2020-10-25 22:01:30,876 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:01:30,934 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:01:30,934 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:01:30,937 INFO L168 Benchmark]: Toolchain (without parser) took 5512.60 ms. Allocated memory was 41.9 MB in the beginning and 65.0 MB in the end (delta: 23.1 MB). Free memory was 19.8 MB in the beginning and 23.7 MB in the end (delta: -3.9 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:30,938 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 41.9 MB. Free memory is still 24.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:30,939 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.73 ms. Allocated memory is still 41.9 MB. Free memory was 19.2 MB in the beginning and 19.5 MB in the end (delta: -342.2 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:30,939 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.70 ms. Allocated memory is still 41.9 MB. Free memory was 19.5 MB in the beginning and 17.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:30,940 INFO L168 Benchmark]: Boogie Preprocessor took 71.14 ms. Allocated memory is still 41.9 MB. Free memory was 17.7 MB in the beginning and 16.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:30,941 INFO L168 Benchmark]: RCFGBuilder took 597.28 ms. Allocated memory was 41.9 MB in the beginning and 52.4 MB in the end (delta: 10.5 MB). Free memory was 16.1 MB in the beginning and 32.0 MB in the end (delta: -15.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:30,942 INFO L168 Benchmark]: TraceAbstraction took 4285.67 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 31.5 MB in the beginning and 26.4 MB in the end (delta: 5.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2020-10-25 22:01:30,943 INFO L168 Benchmark]: Witness Printer took 61.79 ms. Allocated memory is still 65.0 MB. Free memory was 26.4 MB in the beginning and 23.7 MB in the end (delta: 2.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:01:30,948 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 41.9 MB. Free memory is still 24.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 387.73 ms. Allocated memory is still 41.9 MB. Free memory was 19.2 MB in the beginning and 19.5 MB in the end (delta: -342.2 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 94.70 ms. Allocated memory is still 41.9 MB. Free memory was 19.5 MB in the beginning and 17.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 71.14 ms. Allocated memory is still 41.9 MB. Free memory was 17.7 MB in the beginning and 16.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 597.28 ms. Allocated memory was 41.9 MB in the beginning and 52.4 MB in the end (delta: 10.5 MB). Free memory was 16.1 MB in the beginning and 32.0 MB in the end (delta: -15.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4285.67 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 31.5 MB in the beginning and 26.4 MB in the end (delta: 5.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. * Witness Printer took 61.79 ms. Allocated memory is still 65.0 MB. Free memory was 26.4 MB in the beginning and 23.7 MB in the end (delta: 2.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 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: 4.1s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.6s, 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, 0.2s 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, 0.4s 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...