./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/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan --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 Taipan --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/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan --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 Taipan --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 [2019-10-22 11:26:34,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:26:34,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:26:34,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:26:34,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:26:34,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:26:34,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:26:34,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:26:34,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:26:34,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:26:34,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:26:34,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:26:34,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:26:34,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:26:34,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:26:34,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:26:34,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:26:34,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:26:34,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:26:34,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:26:34,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:26:34,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:26:34,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:26:34,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:26:34,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:26:34,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:26:34,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:26:34,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:26:34,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:26:34,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:26:34,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:26:34,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:26:34,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:26:34,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:26:34,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:26:34,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:26:34,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:26:34,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:26:34,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:26:34,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:26:34,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:26:34,468 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:26:34,483 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:26:34,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:26:34,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:26:34,484 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:26:34,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:26:34,485 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:26:34,485 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:26:34,485 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:26:34,485 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:26:34,486 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:26:34,486 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:26:34,486 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:26:34,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:26:34,487 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:26:34,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:26:34,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:26:34,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:26:34,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:26:34,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:26:34,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:26:34,488 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:26:34,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:26:34,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:26:34,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:26:34,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:26:34,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:26:34,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:26:34,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:26:34,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:26:34,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:26:34,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:26:34,501 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:26:34,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:26:34,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:26:34,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:26:34,502 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan 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 -> Taipan 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 [2019-10-22 11:26:34,538 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:26:34,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:26:34,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:26:34,557 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:26:34,558 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:26:34,558 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2019-10-22 11:26:34,620 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/data/8fe2bea13/42f94f6eff194e85936f8f661fd30fb8/FLAGd828934bd [2019-10-22 11:26:35,012 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:26:35,013 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2019-10-22 11:26:35,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/data/8fe2bea13/42f94f6eff194e85936f8f661fd30fb8/FLAGd828934bd [2019-10-22 11:26:35,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/data/8fe2bea13/42f94f6eff194e85936f8f661fd30fb8 [2019-10-22 11:26:35,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:26:35,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:26:35,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:35,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:26:35,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:26:35,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc78517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35, skipping insertion in model container [2019-10-22 11:26:35,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,056 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:26:35,075 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:26:35,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:35,366 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:26:35,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:35,417 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:26:35,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35 WrapperNode [2019-10-22 11:26:35,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:35,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:35,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:26:35,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:26:35,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:35,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:26:35,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:26:35,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:26:35,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (1/1) ... [2019-10-22 11:26:35,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:26:35,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:26:35,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:26:35,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:26:35,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/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 [2019-10-22 11:26:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:26:35,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-10-22 11:26:35,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:26:35,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:26:35,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 11:26:35,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:26:35,811 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:26:35,812 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-10-22 11:26:35,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:35 BoogieIcfgContainer [2019-10-22 11:26:35,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:26:35,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:26:35,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:26:35,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:26:35,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:26:35" (1/3) ... [2019-10-22 11:26:35,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d79560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:35, skipping insertion in model container [2019-10-22 11:26:35,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:35" (2/3) ... [2019-10-22 11:26:35,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d79560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:35, skipping insertion in model container [2019-10-22 11:26:35,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:35" (3/3) ... [2019-10-22 11:26:35,820 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2019-10-22 11:26:35,829 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:26:35,836 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:26:35,854 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:26:35,892 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:26:35,892 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:26:35,892 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:26:35,892 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:26:35,901 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:26:35,901 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:26:35,901 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:26:35,902 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:26:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-22 11:26:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:26:35,932 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:35,933 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:35,934 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-10-22 11:26:35,967 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:35,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685548612] [2019-10-22 11:26:35,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:35,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:35,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:36,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685548612] [2019-10-22 11:26:36,080 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:36,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:26:36,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048663570] [2019-10-22 11:26:36,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:26:36,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:26:36,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:26:36,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:26:36,096 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-22 11:26:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:36,110 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-10-22 11:26:36,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:26:36,111 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-22 11:26:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:36,120 INFO L225 Difference]: With dead ends: 62 [2019-10-22 11:26:36,120 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 11:26:36,123 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 [2019-10-22 11:26:36,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 11:26:36,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 11:26:36,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 11:26:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-10-22 11:26:36,152 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-10-22 11:26:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:36,153 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-10-22 11:26:36,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:26:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-10-22 11:26:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:26:36,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:36,154 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:36,154 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:36,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:36,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-10-22 11:26:36,155 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:36,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773082891] [2019-10-22 11:26:36,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:36,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:36,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:36,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773082891] [2019-10-22 11:26:36,228 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:36,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 11:26:36,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244194968] [2019-10-22 11:26:36,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:26:36,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:26:36,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:26:36,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:26:36,231 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2019-10-22 11:26:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:36,295 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-10-22 11:26:36,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:26:36,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-22 11:26:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:36,297 INFO L225 Difference]: With dead ends: 53 [2019-10-22 11:26:36,297 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 11:26:36,298 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 [2019-10-22 11:26:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 11:26:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-10-22 11:26:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 11:26:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 11:26:36,303 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-10-22 11:26:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:36,304 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 11:26:36,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:26:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 11:26:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 11:26:36,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:36,304 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:36,305 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2019-10-22 11:26:36,306 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:36,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600279244] [2019-10-22 11:26:36,306 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:36,306 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:36,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:36,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600279244] [2019-10-22 11:26:36,353 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:36,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 11:26:36,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298106920] [2019-10-22 11:26:36,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:26:36,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:26:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:26:36,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:26:36,355 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-10-22 11:26:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:36,411 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-10-22 11:26:36,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:26:36,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-22 11:26:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:36,414 INFO L225 Difference]: With dead ends: 55 [2019-10-22 11:26:36,414 INFO L226 Difference]: Without dead ends: 46 [2019-10-22 11:26:36,414 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 [2019-10-22 11:26:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-22 11:26:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2019-10-22 11:26:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 11:26:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 11:26:36,425 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2019-10-22 11:26:36,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:36,426 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 11:26:36,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:26:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 11:26:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 11:26:36,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:36,426 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:36,427 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:36,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-10-22 11:26:36,427 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:36,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977455111] [2019-10-22 11:26:36,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:36,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:36,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:26:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:26:36,487 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:26:36,487 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:26:36,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:26:36 BoogieIcfgContainer [2019-10-22 11:26:36,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:26:36,514 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:26:36,515 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:26:36,515 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:26:36,515 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:35" (3/4) ... [2019-10-22 11:26:36,519 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 11:26:36,520 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:26:36,522 INFO L168 Benchmark]: Toolchain (without parser) took 1482.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -115.8 MB). Peak memory consumption was 28.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:36,522 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 963.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:36,523 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -193.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:36,524 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:36,524 INFO L168 Benchmark]: Boogie Preprocessor took 33.38 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:36,524 INFO L168 Benchmark]: RCFGBuilder took 317.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:36,525 INFO L168 Benchmark]: TraceAbstraction took 700.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:36,525 INFO L168 Benchmark]: Witness Printer took 5.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:36,528 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 963.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 378.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -193.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 44.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.38 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 317.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 700.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 11.5 GB. * Witness Printer took 5.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 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: 0.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, 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, 0.0s 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 [2019-10-22 11:26:38,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:26:38,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:26:38,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:26:38,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:26:38,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:26:38,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:26:38,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:26:38,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:26:38,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:26:38,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:26:38,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:26:38,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:26:38,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:26:38,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:26:38,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:26:38,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:26:38,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:26:38,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:26:38,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:26:38,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:26:38,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:26:38,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:26:38,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:26:38,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:26:38,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:26:38,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:26:38,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:26:38,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:26:38,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:26:38,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:26:38,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:26:38,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:26:38,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:26:38,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:26:38,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:26:38,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:26:38,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:26:38,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:26:38,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:26:38,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:26:38,741 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:26:38,758 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:26:38,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:26:38,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:26:38,759 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:26:38,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:26:38,760 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:26:38,760 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:26:38,760 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:26:38,760 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:26:38,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:26:38,771 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:26:38,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:26:38,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:26:38,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:26:38,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:26:38,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:26:38,772 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:26:38,772 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:26:38,772 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:26:38,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:26:38,772 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:26:38,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:26:38,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:26:38,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:26:38,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:26:38,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:26:38,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:26:38,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:26:38,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:26:38,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:26:38,774 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:26:38,774 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:26:38,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:26:38,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:26:38,774 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/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan 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 -> Taipan 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 [2019-10-22 11:26:38,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:26:38,825 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:26:38,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:26:38,832 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:26:38,832 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:26:38,833 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2019-10-22 11:26:38,881 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/data/950b10de9/84a9a513dde34c149d9101ffe485f19c/FLAGb0b55039c [2019-10-22 11:26:39,235 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:26:39,236 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2019-10-22 11:26:39,244 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/data/950b10de9/84a9a513dde34c149d9101ffe485f19c/FLAGb0b55039c [2019-10-22 11:26:39,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/data/950b10de9/84a9a513dde34c149d9101ffe485f19c [2019-10-22 11:26:39,648 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:26:39,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:26:39,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:39,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:26:39,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:26:39,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:39,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201898b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39, skipping insertion in model container [2019-10-22 11:26:39,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:39,665 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:26:39,681 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:26:39,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:39,867 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:26:39,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:39,929 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:26:39,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39 WrapperNode [2019-10-22 11:26:39,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:39,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:39,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:26:39,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:26:39,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:40,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:40,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:40,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:26:40,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:26:40,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:26:40,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:40,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:40,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:40,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:40,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:40,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:40,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (1/1) ... [2019-10-22 11:26:40,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:26:40,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:26:40,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:26:40,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:26:40,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/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 [2019-10-22 11:26:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2019-10-22 11:26:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:26:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 11:26:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:26:40,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:26:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:26:40,589 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:26:40,590 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-10-22 11:26:40,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:40 BoogieIcfgContainer [2019-10-22 11:26:40,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:26:40,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:26:40,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:26:40,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:26:40,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:26:39" (1/3) ... [2019-10-22 11:26:40,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8088a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:40, skipping insertion in model container [2019-10-22 11:26:40,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:39" (2/3) ... [2019-10-22 11:26:40,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8088a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:40, skipping insertion in model container [2019-10-22 11:26:40,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:40" (3/3) ... [2019-10-22 11:26:40,597 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2019-10-22 11:26:40,605 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:26:40,613 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:26:40,622 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:26:40,642 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:26:40,642 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:26:40,642 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:26:40,642 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:26:40,642 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:26:40,642 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:26:40,642 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:26:40,643 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:26:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-22 11:26:40,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:26:40,659 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:40,660 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:40,662 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:40,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:40,666 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-10-22 11:26:40,673 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:40,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234468163] [2019-10-22 11:26:40,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/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 [2019-10-22 11:26:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:40,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 11:26:40,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:40,764 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:40,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234468163] [2019-10-22 11:26:40,769 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:40,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:26:40,769 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928165312] [2019-10-22 11:26:40,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:26:40,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:40,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:26:40,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:26:40,789 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-22 11:26:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:40,808 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-10-22 11:26:40,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:26:40,809 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-22 11:26:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:40,820 INFO L225 Difference]: With dead ends: 62 [2019-10-22 11:26:40,820 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 11:26:40,823 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 [2019-10-22 11:26:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 11:26:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 11:26:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 11:26:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-10-22 11:26:40,869 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-10-22 11:26:40,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:40,869 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-10-22 11:26:40,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:26:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-10-22 11:26:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:26:40,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:40,870 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:41,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-10-22 11:26:41,071 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-10-22 11:26:41,072 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:41,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999108557] [2019-10-22 11:26:41,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/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 [2019-10-22 11:26:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:41,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:26:41,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:41,161 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:41,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999108557] [2019-10-22 11:26:41,184 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:41,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 11:26:41,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133537304] [2019-10-22 11:26:41,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:26:41,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:41,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:26:41,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:26:41,189 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2019-10-22 11:26:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:41,298 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-10-22 11:26:41,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:26:41,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-22 11:26:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:41,300 INFO L225 Difference]: With dead ends: 68 [2019-10-22 11:26:41,301 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 11:26:41,302 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 [2019-10-22 11:26:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 11:26:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2019-10-22 11:26:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 11:26:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-10-22 11:26:41,309 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-10-22 11:26:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:41,309 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-10-22 11:26:41,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:26:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-10-22 11:26:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 11:26:41,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:41,311 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:41,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-10-22 11:26:41,517 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-10-22 11:26:41,519 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:41,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474052533] [2019-10-22 11:26:41,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/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 [2019-10-22 11:26:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:41,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:26:41,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:41,664 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:41,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474052533] [2019-10-22 11:26:41,715 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:41,715 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 11:26:41,715 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374009088] [2019-10-22 11:26:41,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:26:41,716 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:41,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:26:41,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:26:41,717 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 6 states. [2019-10-22 11:26:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:41,810 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2019-10-22 11:26:41,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:26:41,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-10-22 11:26:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:41,811 INFO L225 Difference]: With dead ends: 52 [2019-10-22 11:26:41,811 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 11:26:41,811 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 [2019-10-22 11:26:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 11:26:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-22 11:26:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 11:26:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-10-22 11:26:41,815 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2019-10-22 11:26:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:41,816 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-10-22 11:26:41,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:26:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-10-22 11:26:41,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 11:26:41,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:41,817 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:42,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-10-22 11:26:42,021 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2019-10-22 11:26:42,022 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:42,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931195391] [2019-10-22 11:26:42,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/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 [2019-10-22 11:26:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:42,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:26:42,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:42,149 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:42,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931195391] [2019-10-22 11:26:42,169 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:42,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 11:26:42,169 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187397511] [2019-10-22 11:26:42,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:26:42,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:42,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:26:42,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:26:42,170 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2019-10-22 11:26:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:42,259 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2019-10-22 11:26:42,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:26:42,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-22 11:26:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:42,261 INFO L225 Difference]: With dead ends: 65 [2019-10-22 11:26:42,261 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 11:26:42,262 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 [2019-10-22 11:26:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 11:26:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2019-10-22 11:26:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 11:26:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-10-22 11:26:42,266 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2019-10-22 11:26:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:42,267 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-10-22 11:26:42,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:26:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-10-22 11:26:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 11:26:42,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:42,268 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:42,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-10-22 11:26:42,473 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:42,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:42,474 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2019-10-22 11:26:42,474 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:42,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521125137] [2019-10-22 11:26:42,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/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 [2019-10-22 11:26:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:42,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 11:26:42,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:42,596 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:42,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521125137] [2019-10-22 11:26:42,629 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:42,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 11:26:42,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863280963] [2019-10-22 11:26:42,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:26:42,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:42,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:26:42,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:26:42,630 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-10-22 11:26:42,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:42,642 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-10-22 11:26:42,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:26:42,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-22 11:26:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:42,644 INFO L225 Difference]: With dead ends: 40 [2019-10-22 11:26:42,644 INFO L226 Difference]: Without dead ends: 30 [2019-10-22 11:26:42,644 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 [2019-10-22 11:26:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-22 11:26:42,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-22 11:26:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 11:26:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-22 11:26:42,649 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2019-10-22 11:26:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:42,649 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-22 11:26:42,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:26:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-22 11:26:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 11:26:42,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:42,650 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:42,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-10-22 11:26:42,861 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:42,862 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2019-10-22 11:26:42,862 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:42,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920672739] [2019-10-22 11:26:42,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/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 [2019-10-22 11:26:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:42,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:26:42,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:42,969 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:42,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:43,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920672739] [2019-10-22 11:26:43,019 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:43,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-10-22 11:26:43,020 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238669771] [2019-10-22 11:26:43,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:26:43,020 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:43,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:26:43,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:26:43,021 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 9 states. [2019-10-22 11:26:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:43,150 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-10-22 11:26:43,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:26:43,151 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-10-22 11:26:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:43,151 INFO L225 Difference]: With dead ends: 42 [2019-10-22 11:26:43,152 INFO L226 Difference]: Without dead ends: 39 [2019-10-22 11:26:43,152 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 [2019-10-22 11:26:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-22 11:26:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2019-10-22 11:26:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 11:26:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-22 11:26:43,156 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2019-10-22 11:26:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:43,156 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-22 11:26:43,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:26:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-22 11:26:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 11:26:43,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:43,158 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:43,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-10-22 11:26:43,358 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:43,359 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2019-10-22 11:26:43,359 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:43,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847442151] [2019-10-22 11:26:43,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/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 [2019-10-22 11:26:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:43,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:26:43,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:43,487 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:43,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:43,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847442151] [2019-10-22 11:26:43,594 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:43,594 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-22 11:26:43,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308170636] [2019-10-22 11:26:43,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:26:43,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:43,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:26:43,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:26:43,595 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2019-10-22 11:26:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:43,675 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-10-22 11:26:43,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:26:43,678 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-10-22 11:26:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:43,679 INFO L225 Difference]: With dead ends: 45 [2019-10-22 11:26:43,679 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 11:26:43,679 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:26:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 11:26:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-22 11:26:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 11:26:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-10-22 11:26:43,683 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2019-10-22 11:26:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:43,683 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-10-22 11:26:43,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:26:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-10-22 11:26:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:26:43,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:43,684 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] [2019-10-22 11:26:43,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-10-22 11:26:43,898 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:43,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:43,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2019-10-22 11:26:43,899 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:43,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333538337] [2019-10-22 11:26:43,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/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 [2019-10-22 11:26:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:26:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:26:44,298 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:26:44,298 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:26:44,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-10-22 11:26:44,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:26:44 BoogieIcfgContainer [2019-10-22 11:26:44,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:26:44,526 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:26:44,526 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:26:44,526 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:26:44,526 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:40" (3/4) ... [2019-10-22 11:26:44,528 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:26:44,581 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0451df66-1264-4ac6-884c-99cb6cf0c82a/bin/utaipan/witness.graphml [2019-10-22 11:26:44,582 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:26:44,583 INFO L168 Benchmark]: Toolchain (without parser) took 4933.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 945.6 MB in the beginning and 928.5 MB in the end (delta: 17.2 MB). Peak memory consumption was 190.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:44,584 INFO L168 Benchmark]: CDTParser took 0.18 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. [2019-10-22 11:26:44,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.84 ms. Allocated memory is still 1.0 GB. Free memory was 945.6 MB in the beginning and 929.5 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:44,585 INFO L168 Benchmark]: Boogie Procedure Inliner took 133.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 929.5 MB in the beginning and 1.2 GB in the end (delta: -239.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:44,585 INFO L168 Benchmark]: Boogie Preprocessor took 49.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:44,586 INFO L168 Benchmark]: RCFGBuilder took 476.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:44,586 INFO L168 Benchmark]: TraceAbstraction took 3933.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 928.5 MB in the end (delta: 207.6 MB). Peak memory consumption was 207.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:44,586 INFO L168 Benchmark]: Witness Printer took 55.95 ms. Allocated memory is still 1.2 GB. Free memory is still 928.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:44,589 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 279.84 ms. Allocated memory is still 1.0 GB. Free memory was 945.6 MB in the beginning and 929.5 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 133.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 929.5 MB in the beginning and 1.2 GB in the end (delta: -239.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 49.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 476.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3933.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 928.5 MB in the end (delta: 207.6 MB). Peak memory consumption was 207.6 MB. Max. memory is 11.5 GB. * Witness Printer took 55.95 ms. Allocated memory is still 1.2 GB. Free memory is still 928.5 MB. There was no memory consumed. 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: 3.8s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 290 SDslu, 362 SDs, 0 SdLazy, 112 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s 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: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.5s 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...