./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f57b560c2271100a3cc213cf38aa06905e4b86e ..................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f57b560c2271100a3cc213cf38aa06905e4b86e .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.24-cad4683 [2019-11-15 22:26:55,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:26:55,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:26:55,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:26:55,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:26:55,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:26:55,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:26:55,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:26:55,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:26:55,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:26:55,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:26:55,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:26:55,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:26:55,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:26:55,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:26:55,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:26:55,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:26:55,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:26:55,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:26:55,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:26:55,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:26:55,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:26:55,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:26:55,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:26:55,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:26:55,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:26:55,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:26:55,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:26:55,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:26:55,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:26:55,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:26:55,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:26:55,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:26:55,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:26:55,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:26:55,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:26:55,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:26:55,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:26:55,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:26:55,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:26:55,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:26:55,506 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 22:26:55,537 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:26:55,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:26:55,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:26:55,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:26:55,539 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:26:55,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:26:55,540 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:26:55,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 22:26:55,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:26:55,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:26:55,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:26:55,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:26:55,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:26:55,541 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:26:55,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:26:55,541 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:26:55,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:26:55,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:26:55,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:26:55,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:26:55,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:26:55,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:26:55,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:26:55,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:26:55,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:26:55,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 22:26:55,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 22:26:55,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:26:55,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_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 -> 6f57b560c2271100a3cc213cf38aa06905e4b86e [2019-11-15 22:26:55,592 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:26:55,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:26:55,608 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:26:55,609 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:26:55,609 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:26:55,611 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2019-11-15 22:26:55,680 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/data/faaf3bf49/4017c3b0234f4b9db64c8a036ce49860/FLAG971ef7a16 [2019-11-15 22:26:56,183 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:26:56,183 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2019-11-15 22:26:56,189 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/data/faaf3bf49/4017c3b0234f4b9db64c8a036ce49860/FLAG971ef7a16 [2019-11-15 22:26:56,595 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/data/faaf3bf49/4017c3b0234f4b9db64c8a036ce49860 [2019-11-15 22:26:56,597 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:26:56,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:26:56,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:26:56,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:26:56,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:26:56,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a32a016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56, skipping insertion in model container [2019-11-15 22:26:56,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,617 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:26:56,642 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:26:56,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:26:56,863 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:26:56,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:26:56,908 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:26:56,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56 WrapperNode [2019-11-15 22:26:56,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:26:56,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:26:56,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:26:56,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:26:56,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:26:56,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:26:56,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:26:56,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:26:56,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (1/1) ... [2019-11-15 22:26:56,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:26:56,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:26:56,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:26:56,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:26:56,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:26:57,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 22:26:57,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-11-15 22:26:57,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:26:57,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:26:57,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 22:26:57,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 22:26:57,429 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:26:57,429 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-15 22:26:57,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:26:57 BoogieIcfgContainer [2019-11-15 22:26:57,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:26:57,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:26:57,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:26:57,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:26:57,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:26:56" (1/3) ... [2019-11-15 22:26:57,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c866b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:26:57, skipping insertion in model container [2019-11-15 22:26:57,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:26:56" (2/3) ... [2019-11-15 22:26:57,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c866b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:26:57, skipping insertion in model container [2019-11-15 22:26:57,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:26:57" (3/3) ... [2019-11-15 22:26:57,438 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2019-11-15 22:26:57,446 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:26:57,453 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:26:57,463 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:26:57,482 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:26:57,482 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:26:57,482 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:26:57,482 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:26:57,483 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:26:57,483 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:26:57,483 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:26:57,483 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:26:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-15 22:26:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 22:26:57,503 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:26:57,503 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:26:57,505 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:26:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:26:57,510 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-11-15 22:26:57,518 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:26:57,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570949868] [2019-11-15 22:26:57,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:26:57,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:26:57,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:26:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:26:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:26:57,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570949868] [2019-11-15 22:26:57,615 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:26:57,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 22:26:57,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158457013] [2019-11-15 22:26:57,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 22:26:57,620 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:26:57,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 22:26:57,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:26:57,635 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-15 22:26:57,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:26:57,653 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-11-15 22:26:57,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 22:26:57,655 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-15 22:26:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:26:57,665 INFO L225 Difference]: With dead ends: 62 [2019-11-15 22:26:57,665 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 22:26:57,668 INFO L600 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 [2019-11-15 22:26:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 22:26:57,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-15 22:26:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-15 22:26:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-15 22:26:57,701 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-11-15 22:26:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:26:57,702 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-15 22:26:57,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 22:26:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-15 22:26:57,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:26:57,703 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:26:57,703 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:26:57,703 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:26:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:26:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-11-15 22:26:57,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:26:57,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740211269] [2019-11-15 22:26:57,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:26:57,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:26:57,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:26:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:26:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:26:57,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740211269] [2019-11-15 22:26:57,784 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:26:57,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 22:26:57,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966460537] [2019-11-15 22:26:57,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:26:57,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:26:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:26:57,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:26:57,787 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2019-11-15 22:26:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:26:57,895 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-15 22:26:57,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:26:57,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-15 22:26:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:26:57,898 INFO L225 Difference]: With dead ends: 53 [2019-11-15 22:26:57,898 INFO L226 Difference]: Without dead ends: 44 [2019-11-15 22:26:57,899 INFO L600 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 [2019-11-15 22:26:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-15 22:26:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-11-15 22:26:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-15 22:26:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-15 22:26:57,908 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-11-15 22:26:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:26:57,909 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-15 22:26:57,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:26:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-15 22:26:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 22:26:57,910 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:26:57,911 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:26:57,911 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:26:57,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:26:57,912 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2019-11-15 22:26:57,912 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:26:57,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791552257] [2019-11-15 22:26:57,913 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:26:57,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:26:57,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:26:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:26:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:26:58,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791552257] [2019-11-15 22:26:58,010 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:26:58,010 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 22:26:58,010 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864505544] [2019-11-15 22:26:58,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:26:58,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:26:58,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:26:58,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:26:58,011 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-11-15 22:26:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:26:58,074 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-11-15 22:26:58,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:26:58,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-15 22:26:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:26:58,077 INFO L225 Difference]: With dead ends: 55 [2019-11-15 22:26:58,077 INFO L226 Difference]: Without dead ends: 46 [2019-11-15 22:26:58,077 INFO L600 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 [2019-11-15 22:26:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-15 22:26:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2019-11-15 22:26:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-15 22:26:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-15 22:26:58,089 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2019-11-15 22:26:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:26:58,090 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-15 22:26:58,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:26:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-15 22:26:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 22:26:58,092 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:26:58,092 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:26:58,092 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:26:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:26:58,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-11-15 22:26:58,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:26:58,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81141870] [2019-11-15 22:26:58,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:26:58,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:26:58,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:26:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:26:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:26:58,169 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 22:26:58,169 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 22:26:58,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 10:26:58 BoogieIcfgContainer [2019-11-15 22:26:58,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 22:26:58,195 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 22:26:58,196 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 22:26:58,196 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 22:26:58,196 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:26:57" (3/4) ... [2019-11-15 22:26:58,199 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-15 22:26:58,199 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 22:26:58,201 INFO L168 Benchmark]: Toolchain (without parser) took 1601.94 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 951.4 MB in the beginning and 1.0 GB in the end (delta: -56.6 MB). Peak memory consumption was 41.0 MB. Max. memory is 11.5 GB. [2019-11-15 22:26:58,201 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:26:58,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -136.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 22:26:58,203 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.71 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:26:58,203 INFO L168 Benchmark]: Boogie Preprocessor took 33.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 11.5 GB. [2019-11-15 22:26:58,204 INFO L168 Benchmark]: RCFGBuilder took 444.83 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:26:58,205 INFO L168 Benchmark]: TraceAbstraction took 763.77 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 49.2 MB). Peak memory consumption was 49.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:26:58,205 INFO L168 Benchmark]: Witness Printer took 3.94 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:26:58,208 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 309.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -136.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.71 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 444.83 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 763.77 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 49.2 MB). Peak memory consumption was 49.2 MB. Max. memory is 11.5 GB. * Witness Printer took 3.94 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 85]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 84, overapproximation of someUnaryDOUBLEoperation at line 80. Possible FailurePath: [L79] double x = 0.0; [L80] double y = -0.0; [L24] __uint32_t msw, lsw; [L27] ieee_double_shape_type ew_u; [L28] ew_u.value = (x) [L29] EXPR ew_u.parts.msw [L29] (msw) = ew_u.parts.msw [L30] EXPR ew_u.parts.lsw [L30] (lsw) = ew_u.parts.lsw [L33-L34] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L36-L37] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L39-L40] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L43-L44] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L47] return 0; [L52] COND TRUE __fpclassify_double(x) == 0 [L53] return y; [L81] double res = fmax_double(x, y); [L84] EXPR res == 0.0 && __signbit_double(res) == 0 [L84] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L85] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 32 SDslu, 140 SDs, 0 SdLazy, 30 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 3 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: 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 0.1.24-cad4683 [2019-11-15 22:27:00,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:27:00,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:27:00,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:27:00,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:27:00,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:27:00,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:27:00,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:27:00,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:27:00,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:27:00,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:27:00,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:27:00,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:27:00,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:27:00,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:27:00,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:27:00,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:27:00,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:27:00,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:27:00,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:27:00,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:27:00,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:27:00,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:27:00,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:27:00,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:27:00,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:27:00,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:27:00,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:27:00,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:27:00,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:27:00,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:27:00,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:27:00,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:27:00,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:27:00,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:27:00,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:27:00,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:27:00,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:27:00,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:27:00,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:27:00,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:27:00,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-15 22:27:00,429 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:27:00,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:27:00,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:27:00,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:27:00,431 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:27:00,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:27:00,432 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:27:00,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:27:00,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:27:00,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:27:00,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:27:00,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:27:00,433 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-15 22:27:00,434 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-15 22:27:00,434 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:27:00,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:27:00,434 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:27:00,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:27:00,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:27:00,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:27:00,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:27:00,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:27:00,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:27:00,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:27:00,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:27:00,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:27:00,437 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-15 22:27:00,437 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-15 22:27:00,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:27:00,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 22:27:00,438 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_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 -> 6f57b560c2271100a3cc213cf38aa06905e4b86e [2019-11-15 22:27:00,468 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:27:00,479 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:27:00,482 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:27:00,483 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:27:00,484 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:27:00,485 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2019-11-15 22:27:00,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/data/d3185ac31/d51da69b09ef4f9d85055c0d5537c66f/FLAG862a4c62e [2019-11-15 22:27:00,933 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:27:00,934 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2019-11-15 22:27:00,942 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/data/d3185ac31/d51da69b09ef4f9d85055c0d5537c66f/FLAG862a4c62e [2019-11-15 22:27:01,395 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/data/d3185ac31/d51da69b09ef4f9d85055c0d5537c66f [2019-11-15 22:27:01,398 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:27:01,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:27:01,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:27:01,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:27:01,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:27:01,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:01,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61c3f0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01, skipping insertion in model container [2019-11-15 22:27:01,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:01,416 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:27:01,439 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:27:01,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:27:01,706 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:27:01,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:27:01,854 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:27:01,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01 WrapperNode [2019-11-15 22:27:01,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:27:01,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:27:01,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:27:01,857 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:27:01,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:01,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:01,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:27:01,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:27:01,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:27:01,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:27:01,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:01,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:01,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:01,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:01,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:01,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:02,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (1/1) ... [2019-11-15 22:27:02,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:27:02,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:27:02,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:27:02,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:27:02,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:27:02,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2019-11-15 22:27:02,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 22:27:02,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-15 22:27:02,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:27:02,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:27:02,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 22:27:02,659 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:27:02,659 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-15 22:27:02,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:27:02 BoogieIcfgContainer [2019-11-15 22:27:02,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:27:02,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:27:02,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:27:02,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:27:02,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:27:01" (1/3) ... [2019-11-15 22:27:02,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3191bf1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:27:02, skipping insertion in model container [2019-11-15 22:27:02,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:27:01" (2/3) ... [2019-11-15 22:27:02,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3191bf1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:27:02, skipping insertion in model container [2019-11-15 22:27:02,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:27:02" (3/3) ... [2019-11-15 22:27:02,668 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2019-11-15 22:27:02,677 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:27:02,687 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:27:02,699 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:27:02,722 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:27:02,722 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:27:02,723 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:27:02,723 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:27:02,723 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:27:02,724 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:27:02,724 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:27:02,724 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:27:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-15 22:27:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 22:27:02,749 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:27:02,750 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:27:02,752 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:27:02,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:27:02,759 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-11-15 22:27:02,771 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:27:02,772 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660637428] [2019-11-15 22:27:02,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-11-15 22:27:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:27:02,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-15 22:27:02,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:27:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:02,896 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:27:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:02,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660637428] [2019-11-15 22:27:02,903 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:27:02,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-15 22:27:02,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890353308] [2019-11-15 22:27:02,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 22:27:02,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:27:02,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 22:27:02,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:27:02,928 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-15 22:27:02,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:27:02,952 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-11-15 22:27:02,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 22:27:02,954 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-15 22:27:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:27:02,967 INFO L225 Difference]: With dead ends: 62 [2019-11-15 22:27:02,967 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 22:27:02,971 INFO L600 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 [2019-11-15 22:27:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 22:27:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-15 22:27:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-15 22:27:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-15 22:27:03,009 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-11-15 22:27:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:27:03,009 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-15 22:27:03,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 22:27:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-15 22:27:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:27:03,011 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:27:03,011 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:27:03,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-11-15 22:27:03,225 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:27:03,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:27:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-11-15 22:27:03,226 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:27:03,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705726279] [2019-11-15 22:27:03,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-11-15 22:27:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:27:03,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:27:03,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:27:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:03,361 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:27:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:03,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705726279] [2019-11-15 22:27:03,399 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:27:03,399 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-15 22:27:03,399 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018652381] [2019-11-15 22:27:03,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:27:03,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:27:03,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:27:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:27:03,402 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2019-11-15 22:27:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:27:03,579 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-11-15 22:27:03,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:27:03,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-15 22:27:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:27:03,583 INFO L225 Difference]: With dead ends: 68 [2019-11-15 22:27:03,584 INFO L226 Difference]: Without dead ends: 59 [2019-11-15 22:27:03,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:27:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-15 22:27:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2019-11-15 22:27:03,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-15 22:27:03,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-15 22:27:03,606 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-11-15 22:27:03,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:27:03,607 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-15 22:27:03,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:27:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-15 22:27:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 22:27:03,612 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:27:03,613 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:27:03,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-11-15 22:27:03,824 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:27:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:27:03,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-11-15 22:27:03,826 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:27:03,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342153696] [2019-11-15 22:27:03,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/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 [2019-11-15 22:27:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:27:03,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 22:27:03,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:27:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:03,994 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:27:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:04,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342153696] [2019-11-15 22:27:04,043 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:27:04,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-15 22:27:04,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941445073] [2019-11-15 22:27:04,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:27:04,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:27:04,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:27:04,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:27:04,045 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 6 states. [2019-11-15 22:27:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:27:04,159 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2019-11-15 22:27:04,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:27:04,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-15 22:27:04,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:27:04,160 INFO L225 Difference]: With dead ends: 52 [2019-11-15 22:27:04,160 INFO L226 Difference]: Without dead ends: 28 [2019-11-15 22:27:04,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:27:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-15 22:27:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-15 22:27:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-15 22:27:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-15 22:27:04,166 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2019-11-15 22:27:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:27:04,166 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-15 22:27:04,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:27:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-15 22:27:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 22:27:04,167 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:27:04,168 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:27:04,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-11-15 22:27:04,372 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:27:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:27:04,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2019-11-15 22:27:04,373 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:27:04,374 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892200127] [2019-11-15 22:27:04,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/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 [2019-11-15 22:27:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:27:04,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:27:04,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:27:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:04,541 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:27:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:04,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892200127] [2019-11-15 22:27:04,561 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:27:04,561 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-15 22:27:04,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916035378] [2019-11-15 22:27:04,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:27:04,562 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:27:04,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:27:04,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:27:04,563 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2019-11-15 22:27:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:27:04,678 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2019-11-15 22:27:04,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:27:04,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-15 22:27:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:27:04,681 INFO L225 Difference]: With dead ends: 65 [2019-11-15 22:27:04,681 INFO L226 Difference]: Without dead ends: 56 [2019-11-15 22:27:04,681 INFO L600 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 [2019-11-15 22:27:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-15 22:27:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2019-11-15 22:27:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 22:27:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-15 22:27:04,689 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2019-11-15 22:27:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:27:04,689 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-15 22:27:04,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:27:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-15 22:27:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 22:27:04,691 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:27:04,691 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:27:04,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-11-15 22:27:04,914 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:27:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:27:04,914 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2019-11-15 22:27:04,914 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:27:04,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783070664] [2019-11-15 22:27:04,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/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 [2019-11-15 22:27:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:27:05,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 22:27:05,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:27:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:05,081 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:27:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:05,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783070664] [2019-11-15 22:27:05,132 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:27:05,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 22:27:05,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107973855] [2019-11-15 22:27:05,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:27:05,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:27:05,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:27:05,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:27:05,134 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-11-15 22:27:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:27:05,154 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-11-15 22:27:05,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:27:05,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-15 22:27:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:27:05,157 INFO L225 Difference]: With dead ends: 40 [2019-11-15 22:27:05,157 INFO L226 Difference]: Without dead ends: 30 [2019-11-15 22:27:05,157 INFO L600 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 [2019-11-15 22:27:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-15 22:27:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-15 22:27:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 22:27:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-11-15 22:27:05,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2019-11-15 22:27:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:27:05,163 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-11-15 22:27:05,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:27:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-11-15 22:27:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 22:27:05,165 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:27:05,165 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:27:05,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-11-15 22:27:05,381 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:27:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:27:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2019-11-15 22:27:05,382 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:27:05,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432029297] [2019-11-15 22:27:05,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/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 [2019-11-15 22:27:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:27:05,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 22:27:05,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:27:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:05,567 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:27:05,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:27:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:05,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432029297] [2019-11-15 22:27:05,643 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:27:05,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-11-15 22:27:05,643 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326176773] [2019-11-15 22:27:05,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 22:27:05,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:27:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 22:27:05,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:27:05,645 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 9 states. [2019-11-15 22:27:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:27:05,842 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-11-15 22:27:05,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 22:27:05,843 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-11-15 22:27:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:27:05,844 INFO L225 Difference]: With dead ends: 42 [2019-11-15 22:27:05,844 INFO L226 Difference]: Without dead ends: 39 [2019-11-15 22:27:05,844 INFO L600 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 [2019-11-15 22:27:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-15 22:27:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2019-11-15 22:27:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 22:27:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-15 22:27:05,850 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2019-11-15 22:27:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:27:05,854 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-15 22:27:05,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 22:27:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-15 22:27:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 22:27:05,856 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:27:05,856 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:27:06,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-11-15 22:27:06,064 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:27:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:27:06,065 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2019-11-15 22:27:06,065 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:27:06,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995672117] [2019-11-15 22:27:06,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/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 [2019-11-15 22:27:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:27:06,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 22:27:06,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:27:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:06,214 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:27:06,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:27:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:27:06,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995672117] [2019-11-15 22:27:06,386 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:27:06,386 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-15 22:27:06,386 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353307471] [2019-11-15 22:27:06,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:27:06,387 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:27:06,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:27:06,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:27:06,388 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2019-11-15 22:27:06,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:27:06,549 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-11-15 22:27:06,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:27:06,551 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-15 22:27:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:27:06,552 INFO L225 Difference]: With dead ends: 45 [2019-11-15 22:27:06,552 INFO L226 Difference]: Without dead ends: 27 [2019-11-15 22:27:06,553 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-15 22:27:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-15 22:27:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-15 22:27:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-15 22:27:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-11-15 22:27:06,558 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2019-11-15 22:27:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:27:06,559 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-15 22:27:06,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:27:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-11-15 22:27:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 22:27:06,560 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:27:06,561 INFO L380 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] [2019-11-15 22:27:06,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-11-15 22:27:06,776 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:27:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:27:06,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2019-11-15 22:27:06,777 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:27:06,778 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777591728] [2019-11-15 22:27:06,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/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 [2019-11-15 22:27:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:27:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:27:07,362 INFO L168 tionRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-15 22:27:07,362 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 22:27:07,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-11-15 22:27:07,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 10:27:07 BoogieIcfgContainer [2019-11-15 22:27:07,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 22:27:07,607 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 22:27:07,607 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 22:27:07,607 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 22:27:07,608 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:27:02" (3/4) ... [2019-11-15 22:27:07,610 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 22:27:07,692 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ed343e28-4762-4e8c-b771-bca60afb0008/bin/uautomizer/witness.graphml [2019-11-15 22:27:07,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 22:27:07,695 INFO L168 Benchmark]: Toolchain (without parser) took 6294.73 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 947.0 MB in the beginning and 842.0 MB in the end (delta: 105.0 MB). Peak memory consumption was 201.4 MB. Max. memory is 11.5 GB. [2019-11-15 22:27:07,695 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:27:07,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.45 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -137.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 22:27:07,696 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:27:07,697 INFO L168 Benchmark]: Boogie Preprocessor took 78.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-15 22:27:07,697 INFO L168 Benchmark]: RCFGBuilder took 644.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:27:07,698 INFO L168 Benchmark]: TraceAbstraction took 4945.44 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 848.9 MB in the end (delta: 209.1 MB). Peak memory consumption was 209.1 MB. Max. memory is 11.5 GB. [2019-11-15 22:27:07,698 INFO L168 Benchmark]: Witness Printer took 85.33 ms. Allocated memory is still 1.1 GB. Free memory was 848.9 MB in the beginning and 842.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-15 22:27:07,701 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 455.45 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -137.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 79.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 78.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 644.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4945.44 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 848.9 MB in the end (delta: 209.1 MB). Peak memory consumption was 209.1 MB. Max. memory is 11.5 GB. * Witness Printer took 85.33 ms. Allocated memory is still 1.1 GB. Free memory was 848.9 MB in the beginning and 842.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 85]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L79] double x = 0.0; [L80] double y = -0.0; [L24] __uint32_t msw, lsw; [L27] ieee_double_shape_type ew_u; [L28] ew_u.value = (x) [L29] EXPR ew_u.parts.msw [L29] (msw) = ew_u.parts.msw [L30] EXPR ew_u.parts.lsw [L30] (lsw) = ew_u.parts.lsw [L33-L34] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L35] return 2; [L52] COND FALSE !(__fpclassify_double(x) == 0) [L24] __uint32_t msw, lsw; [L27] ieee_double_shape_type ew_u; [L28] ew_u.value = (x) [L29] EXPR ew_u.parts.msw [L29] (msw) = ew_u.parts.msw [L30] EXPR ew_u.parts.lsw [L30] (lsw) = ew_u.parts.lsw [L33-L34] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L35] return 2; [L54] COND FALSE !(__fpclassify_double(y) == 0) [L57] EXPR x > y ? x : y [L57] return x > y ? x : y; [L81] double res = fmax_double(x, y); [L84] EXPR res == 0.0 && __signbit_double(res) == 0 [L61] __uint32_t msw; [L64] ieee_double_shape_type gh_u; [L65] gh_u.value = (x) [L66] EXPR gh_u.parts.msw [L66] (msw) = gh_u.parts.msw [L69] return (msw & 0x80000000) != 0; [L84] EXPR res == 0.0 && __signbit_double(res) == 0 [L84] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L85] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.8s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 290 SDslu, 362 SDs, 0 SdLazy, 112 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 15 QuantifiedInterpolants, 12524 SizeOfPredicates, 27 NumberOfNonLiveVariables, 374 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...