./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_0660a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_0660a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 351a41b333a03034af243bf6ecb848a7608d7ac0 ................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_0660a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 351a41b333a03034af243bf6ecb848a7608d7ac0 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:09:08,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:09:08,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:09:08,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:09:08,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:09:08,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:09:08,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:09:08,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:09:08,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:09:08,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:09:08,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:09:08,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:09:08,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:09:08,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:09:08,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:09:08,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:09:08,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:09:08,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:09:08,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:09:08,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:09:08,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:09:08,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:09:08,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:09:08,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:09:08,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:09:08,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:09:08,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:09:08,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:09:08,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:09:08,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:09:08,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:09:08,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:09:08,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:09:08,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:09:08,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:09:08,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:09:08,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:09:08,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:09:08,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:09:08,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:09:08,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:09:08,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:09:08,469 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:09:08,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:09:08,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:09:08,470 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:09:08,470 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:09:08,471 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:09:08,471 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:09:08,471 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:09:08,471 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:09:08,471 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:09:08,471 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:09:08,471 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:09:08,471 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:09:08,471 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:09:08,472 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:09:08,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:09:08,472 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:09:08,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:09:08,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:09:08,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:09:08,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:09:08,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:09:08,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:09:08,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:09:08,474 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:09:08,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:09:08,474 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:09:08,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:09:08,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:09:08,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:09:08,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:09:08,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:09:08,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:09:08,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:09:08,476 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:09:08,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:09:08,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:09:08,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:09:08,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:09:08,476 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 351a41b333a03034af243bf6ecb848a7608d7ac0 [2020-12-09 07:09:08,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:09:08,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:09:08,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:09:08,687 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:09:08,687 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:09:08,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_0660a.c [2020-12-09 07:09:08,729 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/data/a3731cb2f/01e7ac3a34db4934a19227b6f88886eb/FLAG29a756a35 [2020-12-09 07:09:09,106 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:09:09,106 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c [2020-12-09 07:09:09,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/data/a3731cb2f/01e7ac3a34db4934a19227b6f88886eb/FLAG29a756a35 [2020-12-09 07:09:09,121 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/data/a3731cb2f/01e7ac3a34db4934a19227b6f88886eb [2020-12-09 07:09:09,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:09:09,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:09:09,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:09:09,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:09:09,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:09:09,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49bc8ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09, skipping insertion in model container [2020-12-09 07:09:09,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:09:09,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:09:09,320 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c[6214,6227] [2020-12-09 07:09:09,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:09:09,332 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:09:09,372 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c[6214,6227] [2020-12-09 07:09:09,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:09:09,386 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:09:09,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09 WrapperNode [2020-12-09 07:09:09,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:09:09,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:09:09,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:09:09,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:09:09,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:09:09,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:09:09,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:09:09,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:09:09,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (1/1) ... [2020-12-09 07:09:09,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:09:09,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:09:09,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:09:09,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:09:09,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/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 [2020-12-09 07:09:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:09:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:09:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-09 07:09:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 07:09:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-09 07:09:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:09:09,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:09:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 07:09:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-12-09 07:09:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 07:09:10,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:09:10,246 INFO L299 CfgBuilder]: Removed 44 assume(true) statements. [2020-12-09 07:09:10,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:09:10 BoogieIcfgContainer [2020-12-09 07:09:10,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:09:10,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:09:10,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:09:10,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:09:10,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:09:09" (1/3) ... [2020-12-09 07:09:10,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6352900a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:09:10, skipping insertion in model container [2020-12-09 07:09:10,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:09" (2/3) ... [2020-12-09 07:09:10,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6352900a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:09:10, skipping insertion in model container [2020-12-09 07:09:10,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:09:10" (3/3) ... [2020-12-09 07:09:10,256 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_0660a.c [2020-12-09 07:09:10,268 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:09:10,271 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:09:10,280 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:09:10,298 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:09:10,298 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:09:10,299 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:09:10,299 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:09:10,299 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:09:10,299 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:09:10,299 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:09:10,299 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:09:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-12-09 07:09:10,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 07:09:10,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:09:10,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:09:10,316 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:09:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:09:10,320 INFO L82 PathProgramCache]: Analyzing trace with hash -703808070, now seen corresponding path program 1 times [2020-12-09 07:09:10,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:09:10,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600942063] [2020-12-09 07:09:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:09:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:09:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:09:10,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600942063] [2020-12-09 07:09:10,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:09:10,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:09:10,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995093357] [2020-12-09 07:09:10,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 07:09:10,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:09:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 07:09:10,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:09:10,453 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2020-12-09 07:09:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:09:10,470 INFO L93 Difference]: Finished difference Result 166 states and 283 transitions. [2020-12-09 07:09:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 07:09:10,471 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-09 07:09:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:09:10,478 INFO L225 Difference]: With dead ends: 166 [2020-12-09 07:09:10,479 INFO L226 Difference]: Without dead ends: 81 [2020-12-09 07:09:10,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:09:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-09 07:09:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-09 07:09:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-09 07:09:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 110 transitions. [2020-12-09 07:09:10,525 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 110 transitions. Word has length 10 [2020-12-09 07:09:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:09:10,526 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 110 transitions. [2020-12-09 07:09:10,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 07:09:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 110 transitions. [2020-12-09 07:09:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 07:09:10,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:09:10,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:09:10,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:09:10,527 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:09:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:09:10,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2034900675, now seen corresponding path program 1 times [2020-12-09 07:09:10,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:09:10,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343752973] [2020-12-09 07:09:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:09:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:09:10,578 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:09:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:09:10,616 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:09:10,637 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 07:09:10,637 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:09:10,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 07:09:10,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:09:10 BoogieIcfgContainer [2020-12-09 07:09:10,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:09:10,665 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:09:10,665 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:09:10,665 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:09:10,666 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:09:10" (3/4) ... [2020-12-09 07:09:10,668 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 07:09:10,668 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:09:10,669 INFO L168 Benchmark]: Toolchain (without parser) took 1544.41 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 69.3 MB in the beginning and 86.5 MB in the end (delta: -17.2 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:09:10,670 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 107.0 MB. Free memory is still 85.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:09:10,670 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.45 ms. Allocated memory is still 107.0 MB. Free memory was 69.2 MB in the beginning and 78.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:09:10,671 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.25 ms. Allocated memory is still 107.0 MB. Free memory was 78.0 MB in the beginning and 74.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:09:10,671 INFO L168 Benchmark]: Boogie Preprocessor took 40.17 ms. Allocated memory is still 107.0 MB. Free memory was 74.7 MB in the beginning and 71.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:09:10,672 INFO L168 Benchmark]: RCFGBuilder took 777.47 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 71.3 MB in the beginning and 62.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:09:10,672 INFO L168 Benchmark]: TraceAbstraction took 415.07 ms. Allocated memory is still 130.0 MB. Free memory was 61.2 MB in the beginning and 86.5 MB in the end (delta: -25.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:09:10,672 INFO L168 Benchmark]: Witness Printer took 2.85 ms. Allocated memory is still 130.0 MB. Free memory is still 86.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:09:10,675 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 107.0 MB. Free memory is still 85.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 261.45 ms. Allocated memory is still 107.0 MB. Free memory was 69.2 MB in the beginning and 78.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.25 ms. Allocated memory is still 107.0 MB. Free memory was 78.0 MB in the beginning and 74.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.17 ms. Allocated memory is still 107.0 MB. Free memory was 74.7 MB in the beginning and 71.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 777.47 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 71.3 MB in the beginning and 62.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 415.07 ms. Allocated memory is still 130.0 MB. Free memory was 61.2 MB in the beginning and 86.5 MB in the end (delta: -25.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.85 ms. Allocated memory is still 130.0 MB. Free memory is still 86.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 261]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 164, overapproximation of someUnaryDOUBLEoperation at line 54, overapproximation of bitwiseAnd at line 162, overapproximation of someBinaryArithmeticDOUBLEoperation at line 165, overapproximation of someBinaryDOUBLEComparisonOperation at line 260. Possible FailurePath: [L39-L44] static const double atanhi_atan[] = { 4.63647609000806093515e-01, 7.85398163397448278999e-01, 9.82793723247329054082e-01, 1.57079632679489655800e+00, }; [L46-L51] static const double atanlo_atan[] = { 2.26987774529616870924e-17, 3.06161699786838301793e-17, 1.39033110312309984516e-17, 6.12323399573676603587e-17, }; [L53-L60] static const double aT_atan[] = { 3.33333333333329318027e-01, -1.99999999998764832476e-01, 1.42857142725034663711e-01, -1.11111104054623557880e-01, 9.09088713343650656196e-02, -7.69187620504482999495e-02, 6.66107313738753120669e-02, -5.83357013379057348645e-02, 4.97687799461593236017e-02, -3.65315727442169155270e-02, 1.62858201153657823623e-02, }; [L62-L64] static const double one_atan = 1.0, pi_o_4 = 7.8539816339744827900E-01, pi_o_2 = 1.5707963267948965580E+00, pi = 3.1415926535897931160E+00, huge_atan = 1.0e300; [L141-L142] static const double tiny_atan2 = 1.0e-300, zero_atan2 = 0.0, pi_lo_atan2 = 1.2246467991473531772E-16; [L252] double x = __VERIFIER_nondet_double(); [L253] double y = -0.0; VAL [aT_atan={9:0}, atanhi_atan={11:0}, atanlo_atan={5:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L255] COND TRUE x < 0.0 [L145] double z; [L146] __int32_t k, m, hx, hy, ix, iy; [L147] __uint32_t lx, ly; VAL [aT_atan={9:0}, atanhi_atan={11:0}, atanlo_atan={5:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L150] ieee_double_shape_type ew_u; [L151] ew_u.value = (x) [L152] EXPR ew_u.parts.msw [L152] (hx) = ew_u.parts.msw [L153] EXPR ew_u.parts.lsw [L153] (lx) = ew_u.parts.lsw [L155] ix = hx & 0x7fffffff VAL [aT_atan={9:0}, atanhi_atan={11:0}, atanlo_atan={5:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L157] ieee_double_shape_type ew_u; [L158] ew_u.value = (y) [L159] EXPR ew_u.parts.msw [L159] (hy) = ew_u.parts.msw [L160] EXPR ew_u.parts.lsw [L160] (ly) = ew_u.parts.lsw [L162] iy = hy & 0x7fffffff VAL [aT_atan={9:0}, atanhi_atan={11:0}, atanlo_atan={5:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L163-L164] COND TRUE ((ix | ((lx | -lx) >> 31)) > 0x7ff00000) || ((iy | ((ly | -ly) >> 31)) > 0x7ff00000) [L165] return x + y; VAL [aT_atan={9:0}, atanhi_atan={11:0}, atanlo_atan={5:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L257] double res = __ieee754_atan2(y, x); [L260] COND TRUE res != -pi VAL [aT_atan={9:0}, atanhi_atan={11:0}, atanlo_atan={5:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L261] reach_error() VAL [aT_atan={9:0}, atanhi_atan={11:0}, atanlo_atan={5:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 114 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:09:12,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:09:12,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:09:12,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:09:12,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:09:12,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:09:12,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:09:12,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:09:12,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:09:12,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:09:12,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:09:12,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:09:12,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:09:12,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:09:12,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:09:12,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:09:12,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:09:12,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:09:12,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:09:12,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:09:12,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:09:12,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:09:12,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:09:12,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:09:12,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:09:12,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:09:12,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:09:12,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:09:12,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:09:12,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:09:12,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:09:12,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:09:12,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:09:12,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:09:12,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:09:12,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:09:12,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:09:12,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:09:12,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:09:12,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:09:12,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:09:12,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 07:09:12,421 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:09:12,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:09:12,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:09:12,423 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:09:12,423 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:09:12,423 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:09:12,423 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:09:12,423 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:09:12,424 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:09:12,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:09:12,425 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:09:12,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:09:12,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:09:12,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:09:12,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:09:12,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:09:12,426 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:09:12,426 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 07:09:12,426 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 07:09:12,426 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:09:12,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:09:12,427 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:09:12,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:09:12,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:09:12,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 07:09:12,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:09:12,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:09:12,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:09:12,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:09:12,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:09:12,429 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 07:09:12,429 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 07:09:12,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:09:12,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:09:12,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:09:12,430 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 351a41b333a03034af243bf6ecb848a7608d7ac0 [2020-12-09 07:09:12,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:09:12,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:09:12,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:09:12,723 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:09:12,724 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:09:12,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_0660a.c [2020-12-09 07:09:12,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/data/18b19fbaf/a555915c72cb456da0e7a853f4a89138/FLAG0440f4b48 [2020-12-09 07:09:13,106 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:09:13,107 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c [2020-12-09 07:09:13,113 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/data/18b19fbaf/a555915c72cb456da0e7a853f4a89138/FLAG0440f4b48 [2020-12-09 07:09:13,543 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/data/18b19fbaf/a555915c72cb456da0e7a853f4a89138 [2020-12-09 07:09:13,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:09:13,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:09:13,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:09:13,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:09:13,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:09:13,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b90ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13, skipping insertion in model container [2020-12-09 07:09:13,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:09:13,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:09:13,731 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c[6214,6227] [2020-12-09 07:09:13,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:09:13,747 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:09:13,802 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c[6214,6227] [2020-12-09 07:09:13,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:09:13,827 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:09:13,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13 WrapperNode [2020-12-09 07:09:13,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:09:13,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:09:13,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:09:13,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:09:13,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:09:13,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:09:13,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:09:13,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:09:13,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (1/1) ... [2020-12-09 07:09:13,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:09:13,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:09:13,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:09:13,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:09:13,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/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 [2020-12-09 07:09:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-12-09 07:09:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-09 07:09:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 07:09:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:09:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE8 [2020-12-09 07:09:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 07:09:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:09:14,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:09:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 07:09:14,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 07:10:02,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:10:02,506 INFO L299 CfgBuilder]: Removed 44 assume(true) statements. [2020-12-09 07:10:02,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:10:02 BoogieIcfgContainer [2020-12-09 07:10:02,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:10:02,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:10:02,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:10:02,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:10:02,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:09:13" (1/3) ... [2020-12-09 07:10:02,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6706ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:10:02, skipping insertion in model container [2020-12-09 07:10:02,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:09:13" (2/3) ... [2020-12-09 07:10:02,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6706ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:10:02, skipping insertion in model container [2020-12-09 07:10:02,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:10:02" (3/3) ... [2020-12-09 07:10:02,515 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_0660a.c [2020-12-09 07:10:02,526 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:10:02,529 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:10:02,538 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:10:02,558 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:10:02,558 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:10:02,558 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:10:02,558 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:10:02,558 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:10:02,558 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:10:02,558 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:10:02,558 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:10:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-12-09 07:10:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 07:10:02,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:02,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:02,572 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:02,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1059427896, now seen corresponding path program 1 times [2020-12-09 07:10:02,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:10:02,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430198357] [2020-12-09 07:10:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/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 [2020-12-09 07:10:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:10:02,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 07:10:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:10:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:10:02,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:10:02,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430198357] [2020-12-09 07:10:02,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:10:02,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:10:02,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292132315] [2020-12-09 07:10:02,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 07:10:02,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:10:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 07:10:02,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:10:02,914 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 2 states. [2020-12-09 07:10:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:10:02,933 INFO L93 Difference]: Finished difference Result 227 states and 382 transitions. [2020-12-09 07:10:02,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 07:10:02,934 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-09 07:10:02,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:10:02,940 INFO L225 Difference]: With dead ends: 227 [2020-12-09 07:10:02,940 INFO L226 Difference]: Without dead ends: 111 [2020-12-09 07:10:02,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:10:02,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-09 07:10:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-12-09 07:10:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-09 07:10:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2020-12-09 07:10:02,970 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 11 [2020-12-09 07:10:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:10:02,970 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2020-12-09 07:10:02,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 07:10:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2020-12-09 07:10:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 07:10:02,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:02,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:03,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 07:10:03,173 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:03,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:03,175 INFO L82 PathProgramCache]: Analyzing trace with hash -7417919, now seen corresponding path program 1 times [2020-12-09 07:10:03,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:10:03,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113243708] [2020-12-09 07:10:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/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 [2020-12-09 07:10:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:10:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 07:10:03,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:10:03,971 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 07:10:04,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2020-12-09 07:10:04,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 07:10:04,587 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 07:10:04,588 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 07:10:04,597 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 07:10:04,597 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:44 [2020-12-09 07:10:04,877 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 07:10:05,220 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 07:10:05,302 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 07:10:05,303 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2020-12-09 07:10:05,306 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 07:10:05,578 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 07:10:05,578 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 07:10:05,582 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 07:10:05,583 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:34 [2020-12-09 07:10:05,976 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 07:10:06,485 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 07:10:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:10:06,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:10:06,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113243708] [2020-12-09 07:10:06,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:10:06,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 07:10:06,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088879644] [2020-12-09 07:10:06,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 07:10:06,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:10:06,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 07:10:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-09 07:10:06,505 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand 8 states. [2020-12-09 07:10:07,152 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-12-09 07:10:07,681 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 07:10:08,187 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-09 07:10:08,961 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-09 07:10:09,505 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-09 07:10:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:10:35,333 INFO L93 Difference]: Finished difference Result 176 states and 244 transitions. [2020-12-09 07:10:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:10:35,399 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-09 07:10:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:10:35,401 INFO L225 Difference]: With dead ends: 176 [2020-12-09 07:10:35,401 INFO L226 Difference]: Without dead ends: 117 [2020-12-09 07:10:35,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-09 07:10:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-09 07:10:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2020-12-09 07:10:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-09 07:10:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2020-12-09 07:10:35,412 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 13 [2020-12-09 07:10:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:10:35,413 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2020-12-09 07:10:35,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 07:10:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2020-12-09 07:10:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 07:10:35,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:35,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:35,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 07:10:35,615 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1171723193, now seen corresponding path program 1 times [2020-12-09 07:10:35,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:10:35,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736632308] [2020-12-09 07:10:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/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 [2020-12-09 07:10:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:10:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 07:10:35,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:10:36,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 07:10:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:10:36,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:10:36,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736632308] [2020-12-09 07:10:36,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:10:36,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 07:10:36,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109999794] [2020-12-09 07:10:36,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 07:10:36,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:10:36,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 07:10:36,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:10:36,985 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand 7 states. [2020-12-09 07:10:37,370 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 07:10:37,761 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 07:10:38,284 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 07:10:38,639 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-09 07:10:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:10:42,451 INFO L93 Difference]: Finished difference Result 184 states and 248 transitions. [2020-12-09 07:10:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 07:10:42,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-09 07:10:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:10:42,452 INFO L225 Difference]: With dead ends: 184 [2020-12-09 07:10:42,453 INFO L226 Difference]: Without dead ends: 121 [2020-12-09 07:10:42,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-09 07:10:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-09 07:10:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2020-12-09 07:10:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-09 07:10:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2020-12-09 07:10:42,463 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 18 [2020-12-09 07:10:42,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:10:42,463 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2020-12-09 07:10:42,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 07:10:42,463 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2020-12-09 07:10:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 07:10:42,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:42,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:42,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 07:10:42,666 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:42,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:42,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1114464891, now seen corresponding path program 1 times [2020-12-09 07:10:42,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:10:42,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800710383] [2020-12-09 07:10:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/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 [2020-12-09 07:10:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:10:42,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 07:10:42,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:10:44,218 WARN L197 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-12-09 07:10:44,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 07:10:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:10:44,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:10:44,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800710383] [2020-12-09 07:10:44,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:10:44,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 07:10:44,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470120212] [2020-12-09 07:10:44,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 07:10:44,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:10:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 07:10:44,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:10:44,535 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand 7 states. [2020-12-09 07:10:44,928 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 07:10:47,442 WARN L197 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-09 07:10:49,757 WARN L197 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 07:10:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:10:53,948 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2020-12-09 07:10:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:10:53,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-09 07:10:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:10:53,950 INFO L225 Difference]: With dead ends: 121 [2020-12-09 07:10:53,950 INFO L226 Difference]: Without dead ends: 91 [2020-12-09 07:10:53,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-09 07:10:53,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-09 07:10:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-12-09 07:10:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 07:10:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2020-12-09 07:10:53,958 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 18 [2020-12-09 07:10:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:10:53,959 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2020-12-09 07:10:53,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 07:10:53,959 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2020-12-09 07:10:53,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 07:10:53,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:10:53,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:10:54,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 07:10:54,162 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:10:54,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:10:54,163 INFO L82 PathProgramCache]: Analyzing trace with hash -960415812, now seen corresponding path program 1 times [2020-12-09 07:10:54,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:10:54,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894523432] [2020-12-09 07:10:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/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 [2020-12-09 07:10:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:10:54,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 07:10:54,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:10:55,155 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 07:10:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:10:55,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:10:55,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894523432] [2020-12-09 07:10:55,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:10:55,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 07:10:55,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186000520] [2020-12-09 07:10:55,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 07:10:55,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:10:55,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 07:10:55,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:10:55,495 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand 7 states. [2020-12-09 07:10:55,887 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 07:10:56,302 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 07:10:56,795 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 07:10:57,329 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-09 07:11:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:11:00,826 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-12-09 07:11:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 07:11:00,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-09 07:11:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:11:00,828 INFO L225 Difference]: With dead ends: 95 [2020-12-09 07:11:00,828 INFO L226 Difference]: Without dead ends: 91 [2020-12-09 07:11:00,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-09 07:11:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-09 07:11:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-12-09 07:11:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 07:11:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-12-09 07:11:00,836 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 19 [2020-12-09 07:11:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:11:00,836 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-12-09 07:11:00,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 07:11:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-12-09 07:11:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 07:11:00,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:11:00,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:11:01,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 07:11:01,039 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:11:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:11:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 286843778, now seen corresponding path program 1 times [2020-12-09 07:11:01,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:11:01,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813363141] [2020-12-09 07:11:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/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 [2020-12-09 07:11:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:11:01,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 07:11:01,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:11:02,545 WARN L197 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-12-09 07:11:02,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 07:11:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:11:02,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:11:02,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813363141] [2020-12-09 07:11:02,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:11:02,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 07:11:02,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167334475] [2020-12-09 07:11:02,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 07:11:02,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:11:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 07:11:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:11:02,846 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 7 states. [2020-12-09 07:11:03,423 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 07:11:04,225 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-09 07:11:04,879 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 07:11:08,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:11:08,774 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2020-12-09 07:11:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:11:08,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-09 07:11:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:11:08,775 INFO L225 Difference]: With dead ends: 95 [2020-12-09 07:11:08,775 INFO L226 Difference]: Without dead ends: 91 [2020-12-09 07:11:08,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-09 07:11:08,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-09 07:11:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-12-09 07:11:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 07:11:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2020-12-09 07:11:08,780 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 20 [2020-12-09 07:11:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:11:08,780 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2020-12-09 07:11:08,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 07:11:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2020-12-09 07:11:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 07:11:08,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:11:08,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:11:08,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 07:11:08,982 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:11:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:11:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1774047840, now seen corresponding path program 1 times [2020-12-09 07:11:08,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:11:08,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761624953] [2020-12-09 07:11:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/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 [2020-12-09 07:11:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:11:09,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 07:11:09,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:11:09,560 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-09 07:11:10,114 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-09 07:11:11,030 WARN L197 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-09 07:11:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:11:11,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:11:11,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761624953] [2020-12-09 07:11:11,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:11:11,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 07:11:11,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805590908] [2020-12-09 07:11:11,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 07:11:11,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:11:11,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 07:11:11,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 07:11:11,038 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 5 states. [2020-12-09 07:11:18,195 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2020-12-09 07:11:20,170 WARN L197 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-12-09 07:11:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:11:48,838 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2020-12-09 07:11:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 07:11:48,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-09 07:11:48,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:11:48,858 INFO L225 Difference]: With dead ends: 97 [2020-12-09 07:11:48,859 INFO L226 Difference]: Without dead ends: 93 [2020-12-09 07:11:48,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:11:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-09 07:11:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-12-09 07:11:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 07:11:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2020-12-09 07:11:48,865 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 20 [2020-12-09 07:11:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:11:48,865 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2020-12-09 07:11:48,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 07:11:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2020-12-09 07:11:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 07:11:48,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:11:48,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:11:49,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 07:11:49,068 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:11:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:11:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1297758981, now seen corresponding path program 1 times [2020-12-09 07:11:49,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:11:49,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923203602] [2020-12-09 07:11:49,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/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 [2020-12-09 07:11:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:11:49,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 07:11:49,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:11:50,475 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-09 07:11:50,949 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 07:11:51,929 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-09 07:11:52,981 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-09 07:11:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:11:53,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:11:53,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923203602] [2020-12-09 07:11:53,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:11:53,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 07:11:53,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272617237] [2020-12-09 07:11:53,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 07:11:53,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:11:53,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 07:11:53,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-09 07:11:53,002 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand 8 states. [2020-12-09 07:11:54,070 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 07:11:54,679 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 07:11:55,330 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-09 07:11:55,908 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-09 07:11:57,118 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-09 07:11:59,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:11:59,803 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-12-09 07:11:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:11:59,984 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-09 07:11:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:11:59,985 INFO L225 Difference]: With dead ends: 106 [2020-12-09 07:11:59,985 INFO L226 Difference]: Without dead ends: 91 [2020-12-09 07:11:59,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-09 07:11:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-09 07:11:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-12-09 07:11:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 07:11:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2020-12-09 07:11:59,989 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 21 [2020-12-09 07:11:59,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:11:59,990 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2020-12-09 07:11:59,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 07:11:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2020-12-09 07:11:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 07:11:59,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:11:59,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:12:00,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 07:12:00,192 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:12:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:12:00,193 INFO L82 PathProgramCache]: Analyzing trace with hash -804510387, now seen corresponding path program 1 times [2020-12-09 07:12:00,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:12:00,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268277615] [2020-12-09 07:12:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 07:12:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:12:00,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 07:12:00,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:12:01,249 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 07:12:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:12:01,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:12:01,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268277615] [2020-12-09 07:12:01,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:12:01,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 07:12:01,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779206686] [2020-12-09 07:12:01,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 07:12:01,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:12:01,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 07:12:01,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:12:01,621 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 7 states. [2020-12-09 07:12:01,975 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 07:12:02,409 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 07:12:02,905 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 07:12:06,606 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-09 07:12:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:12:10,051 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-12-09 07:12:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:12:10,052 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-09 07:12:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:12:10,052 INFO L225 Difference]: With dead ends: 95 [2020-12-09 07:12:10,053 INFO L226 Difference]: Without dead ends: 91 [2020-12-09 07:12:10,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-09 07:12:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-09 07:12:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-12-09 07:12:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-09 07:12:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2020-12-09 07:12:10,056 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 22 [2020-12-09 07:12:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:12:10,057 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2020-12-09 07:12:10,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 07:12:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2020-12-09 07:12:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 07:12:10,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:12:10,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:12:10,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 07:12:10,259 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:12:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:12:10,260 INFO L82 PathProgramCache]: Analyzing trace with hash 111855477, now seen corresponding path program 1 times [2020-12-09 07:12:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:12:10,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009347859] [2020-12-09 07:12:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 07:12:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:12:10,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 07:12:10,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:12:10,952 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-09 07:12:11,337 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 07:12:12,018 WARN L197 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 07:12:12,596 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 07:12:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:12:12,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:12:12,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009347859] [2020-12-09 07:12:12,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:12:12,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 07:12:12,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501861787] [2020-12-09 07:12:12,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:12:12,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:12:12,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:12:12,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 07:12:12,603 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand 6 states. [2020-12-09 07:12:18,556 WARN L197 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-12-09 07:12:21,051 WARN L197 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-12-09 07:12:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:12:48,033 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-12-09 07:12:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:12:48,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-09 07:12:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:12:48,057 INFO L225 Difference]: With dead ends: 99 [2020-12-09 07:12:48,057 INFO L226 Difference]: Without dead ends: 95 [2020-12-09 07:12:48,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 07:12:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-09 07:12:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2020-12-09 07:12:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-09 07:12:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2020-12-09 07:12:48,060 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 25 [2020-12-09 07:12:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:12:48,060 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2020-12-09 07:12:48,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:12:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2020-12-09 07:12:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 07:12:48,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:12:48,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:12:48,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 07:12:48,263 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:12:48,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:12:48,264 INFO L82 PathProgramCache]: Analyzing trace with hash -825662492, now seen corresponding path program 1 times [2020-12-09 07:12:48,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:12:48,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349105179] [2020-12-09 07:12:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 07:12:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:12:48,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 07:12:48,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:12:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:12:48,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:12:48,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349105179] [2020-12-09 07:12:48,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:12:48,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 07:12:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260193481] [2020-12-09 07:12:48,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:12:48,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:12:48,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:12:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:12:48,640 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 3 states. [2020-12-09 07:12:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:12:50,860 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-12-09 07:12:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:12:50,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-09 07:12:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:12:50,878 INFO L225 Difference]: With dead ends: 89 [2020-12-09 07:12:50,878 INFO L226 Difference]: Without dead ends: 82 [2020-12-09 07:12:50,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:12:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-09 07:12:50,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-12-09 07:12:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-09 07:12:50,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-12-09 07:12:50,882 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 26 [2020-12-09 07:12:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:12:50,882 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-12-09 07:12:50,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:12:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-12-09 07:12:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 07:12:50,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:12:50,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:12:51,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-09 07:12:51,085 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:12:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:12:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1286513403, now seen corresponding path program 1 times [2020-12-09 07:12:51,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:12:51,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151576364] [2020-12-09 07:12:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 07:12:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:12:51,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 07:12:51,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:12:53,597 WARN L197 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-12-09 07:12:53,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 07:12:53,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 07:12:53,604 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 07:12:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:12:54,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:12:54,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151576364] [2020-12-09 07:12:54,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:12:54,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-09 07:12:54,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204166945] [2020-12-09 07:12:54,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 07:12:54,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:12:54,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 07:12:54,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-09 07:12:54,034 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 9 states. [2020-12-09 07:12:54,520 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 07:12:55,078 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 07:12:55,684 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 07:12:56,856 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-09 07:13:00,286 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-09 07:13:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:13:04,456 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2020-12-09 07:13:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:13:04,485 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-09 07:13:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:13:04,485 INFO L225 Difference]: With dead ends: 87 [2020-12-09 07:13:04,485 INFO L226 Difference]: Without dead ends: 75 [2020-12-09 07:13:04,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-12-09 07:13:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-09 07:13:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-09 07:13:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-09 07:13:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2020-12-09 07:13:04,489 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 28 [2020-12-09 07:13:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:13:04,489 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2020-12-09 07:13:04,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 07:13:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2020-12-09 07:13:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-09 07:13:04,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:13:04,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:13:04,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-09 07:13:04,692 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:13:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:13:04,693 INFO L82 PathProgramCache]: Analyzing trace with hash -490549731, now seen corresponding path program 1 times [2020-12-09 07:13:04,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:13:04,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608428713] [2020-12-09 07:13:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 07:13:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:13:05,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 07:13:05,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:13:06,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 07:13:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:13:06,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:13:06,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608428713] [2020-12-09 07:13:06,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:13:06,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 07:13:06,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172942926] [2020-12-09 07:13:06,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 07:13:06,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:13:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 07:13:06,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:13:06,990 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand 7 states. [2020-12-09 07:13:07,409 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-09 07:13:07,834 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 07:13:08,355 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 07:13:12,034 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 07:13:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:13:14,564 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-12-09 07:13:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:13:14,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-12-09 07:13:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:13:14,594 INFO L225 Difference]: With dead ends: 79 [2020-12-09 07:13:14,594 INFO L226 Difference]: Without dead ends: 75 [2020-12-09 07:13:14,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-09 07:13:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-09 07:13:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-09 07:13:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-09 07:13:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2020-12-09 07:13:14,597 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 36 [2020-12-09 07:13:14,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:13:14,598 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2020-12-09 07:13:14,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 07:13:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2020-12-09 07:13:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 07:13:14,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:13:14,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:13:14,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-09 07:13:14,800 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:13:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:13:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1125012315, now seen corresponding path program 1 times [2020-12-09 07:13:14,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:13:14,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821936432] [2020-12-09 07:13:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ec21172-15d5-47d1-a338-1f0f6fcee555/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 07:13:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:13:15,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 07:13:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:13:16,264 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-09 07:13:16,641 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 07:13:17,077 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 07:13:17,904 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-09 07:13:18,787 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 07:13:18,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-09 07:13:18,953 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 07:13:19,482 WARN L197 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-09 07:13:19,483 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 07:13:19,486 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-09 07:13:19,486 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:80, output treesize:76 [2020-12-09 07:13:20,709 WARN L197 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-09 07:13:21,906 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-09 07:13:23,179 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-09 07:13:23,268 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 07:13:23,269 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 22 [2020-12-09 07:13:23,270 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 07:13:23,759 WARN L197 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-09 07:13:23,760 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 07:13:23,762 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-09 07:13:23,762 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:89, output treesize:64 [2020-12-09 07:13:25,364 WARN L197 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 07:13:26,933 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-09 07:13:29,161 WARN L197 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-09 07:13:31,242 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-09 07:13:33,802 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-09 07:13:46,047 WARN L197 SmtUtils]: Spent 3.50 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-09 07:13:58,641 WARN L197 SmtUtils]: Spent 3.09 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-09 07:13:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:13:59,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:13:59,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821936432] [2020-12-09 07:13:59,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:13:59,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-12-09 07:13:59,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824035633] [2020-12-09 07:13:59,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 07:13:59,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:13:59,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 07:13:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-12-09 07:13:59,379 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 17 states. [2020-12-09 07:14:04,514 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 07:14:11,938 WARN L197 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 07:14:16,112 WARN L197 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 07:14:19,051 WARN L197 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-09 07:14:23,846 WARN L197 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-09 07:14:27,915 WARN L197 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-09 07:14:30,906 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-09 07:14:31,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-09 07:14:31,109 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:137) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:759) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 31 more [2020-12-09 07:14:31,119 INFO L168 Benchmark]: Toolchain (without parser) took 317569.19 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.3 MB in the beginning and 21.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2020-12-09 07:14:31,119 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 48.2 MB. Free memory is still 31.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:14:31,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.90 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.1 MB in the beginning and 38.6 MB in the end (delta: -14.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:14:31,120 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.82 ms. Allocated memory is still 58.7 MB. Free memory was 38.4 MB in the beginning and 35.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:14:31,120 INFO L168 Benchmark]: Boogie Preprocessor took 62.95 ms. Allocated memory is still 58.7 MB. Free memory was 35.1 MB in the beginning and 31.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:14:31,121 INFO L168 Benchmark]: RCFGBuilder took 48558.74 ms. Allocated memory is still 58.7 MB. Free memory was 31.3 MB in the beginning and 26.7 MB in the end (delta: 4.6 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2020-12-09 07:14:31,121 INFO L168 Benchmark]: TraceAbstraction took 268608.18 ms. Allocated memory is still 58.7 MB. Free memory was 26.4 MB in the beginning and 21.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:14:31,124 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 48.2 MB. Free memory is still 31.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 275.90 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.1 MB in the beginning and 38.6 MB in the end (delta: -14.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.82 ms. Allocated memory is still 58.7 MB. Free memory was 38.4 MB in the beginning and 35.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.95 ms. Allocated memory is still 58.7 MB. Free memory was 35.1 MB in the beginning and 31.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 48558.74 ms. Allocated memory is still 58.7 MB. Free memory was 31.3 MB in the beginning and 26.7 MB in the end (delta: 4.6 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 268608.18 ms. Allocated memory is still 58.7 MB. Free memory was 26.4 MB in the beginning and 21.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...