./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_15-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_15-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/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 87d55100d8515cc1c8c9aa61ce99443e0eafb474 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:08:05,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:08:05,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:08:05,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:08:05,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:08:05,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:08:05,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:08:05,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:08:05,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:08:05,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:08:05,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:08:05,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:08:05,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:08:05,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:08:05,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:08:05,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:08:05,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:08:05,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:08:05,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:08:05,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:08:05,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:08:05,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:08:05,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:08:05,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:08:05,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:08:05,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:08:05,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:08:05,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:08:05,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:08:05,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:08:05,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:08:05,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:08:05,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:08:05,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:08:05,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:08:05,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:08:05,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:08:05,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:08:05,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:08:05,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:08:05,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:08:05,277 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:08:05,314 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:08:05,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:08:05,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:08:05,320 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:08:05,320 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:08:05,320 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:08:05,321 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:08:05,322 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:08:05,322 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:08:05,322 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:08:05,323 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:08:05,323 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:08:05,323 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:08:05,323 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:08:05,324 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:08:05,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:08:05,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:08:05,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:08:05,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:08:05,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:08:05,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:08:05,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:08:05,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:08:05,327 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:08:05,327 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:08:05,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:08:05,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:08:05,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:08:05,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:08:05,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:08:05,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:08:05,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:08:05,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:08:05,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:08:05,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:08:05,332 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:08:05,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:08:05,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:08:05,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:08:05,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:08:05,333 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_2fd841a3-fcd0-46be-adb2-4b7e56421117/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87d55100d8515cc1c8c9aa61ce99443e0eafb474 [2020-11-22 13:08:05,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:08:05,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:08:05,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:08:05,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:08:05,664 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:08:05,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_15-2.c [2020-11-22 13:08:05,746 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/data/552b651aa/d26426e31f2d474aad1110670b6d126d/FLAGcc6768464 [2020-11-22 13:08:06,174 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:08:06,175 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/sv-benchmarks/c/locks/test_locks_15-2.c [2020-11-22 13:08:06,183 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/data/552b651aa/d26426e31f2d474aad1110670b6d126d/FLAGcc6768464 [2020-11-22 13:08:06,555 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/data/552b651aa/d26426e31f2d474aad1110670b6d126d [2020-11-22 13:08:06,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:08:06,559 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:08:06,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:08:06,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:08:06,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:08:06,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec912ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06, skipping insertion in model container [2020-11-22 13:08:06,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:08:06,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:08:06,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:08:06,798 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:08:06,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:08:06,840 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:08:06,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06 WrapperNode [2020-11-22 13:08:06,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:08:06,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:08:06,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:08:06,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:08:06,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:08:06,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:08:06,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:08:06,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:08:06,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (1/1) ... [2020-11-22 13:08:06,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:08:06,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:08:06,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:08:06,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:08:06,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/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 [2020-11-22 13:08:07,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:08:07,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:08:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:08:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:08:07,957 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:08:07,957 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 13:08:07,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:07 BoogieIcfgContainer [2020-11-22 13:08:07,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:08:07,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:08:07,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:08:07,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:08:07,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:08:06" (1/3) ... [2020-11-22 13:08:07,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1049c5a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:08:07, skipping insertion in model container [2020-11-22 13:08:07,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:06" (2/3) ... [2020-11-22 13:08:07,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1049c5a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:08:07, skipping insertion in model container [2020-11-22 13:08:07,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:07" (3/3) ... [2020-11-22 13:08:07,972 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2020-11-22 13:08:07,986 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:08:07,990 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:08:08,001 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:08:08,021 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:08:08,021 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:08:08,021 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:08:08,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:08:08,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:08:08,022 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:08:08,022 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:08:08,022 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:08:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-11-22 13:08:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:08:08,039 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:08,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:08:08,040 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash 447958949, now seen corresponding path program 1 times [2020-11-22 13:08:08,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:08,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510014900] [2020-11-22 13:08:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:08,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510014900] [2020-11-22 13:08:08,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:08,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:08,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731165031] [2020-11-22 13:08:08,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:08,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:08,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:08,273 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-11-22 13:08:08,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:08,348 INFO L93 Difference]: Finished difference Result 78 states and 137 transitions. [2020-11-22 13:08:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:08,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-22 13:08:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:08,370 INFO L225 Difference]: With dead ends: 78 [2020-11-22 13:08:08,378 INFO L226 Difference]: Without dead ends: 67 [2020-11-22 13:08:08,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-22 13:08:08,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2020-11-22 13:08:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 63 transitions. [2020-11-22 13:08:08,434 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 63 transitions. Word has length 6 [2020-11-22 13:08:08,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:08,435 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 63 transitions. [2020-11-22 13:08:08,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:08,436 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 63 transitions. [2020-11-22 13:08:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:08:08,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:08,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:08,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:08:08,438 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1002037259, now seen corresponding path program 1 times [2020-11-22 13:08:08,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:08,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136614561] [2020-11-22 13:08:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:08,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136614561] [2020-11-22 13:08:08,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:08,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:08,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860073455] [2020-11-22 13:08:08,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:08,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:08,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:08,601 INFO L87 Difference]: Start difference. First operand 35 states and 63 transitions. Second operand 4 states. [2020-11-22 13:08:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:08,641 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2020-11-22 13:08:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:08,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 13:08:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:08,643 INFO L225 Difference]: With dead ends: 67 [2020-11-22 13:08:08,644 INFO L226 Difference]: Without dead ends: 65 [2020-11-22 13:08:08,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-22 13:08:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 35. [2020-11-22 13:08:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 62 transitions. [2020-11-22 13:08:08,654 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 62 transitions. Word has length 7 [2020-11-22 13:08:08,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:08,654 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 62 transitions. [2020-11-22 13:08:08,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 62 transitions. [2020-11-22 13:08:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:08:08,655 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:08,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:08,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:08:08,656 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:08,658 INFO L82 PathProgramCache]: Analyzing trace with hash 998596026, now seen corresponding path program 1 times [2020-11-22 13:08:08,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:08,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893317186] [2020-11-22 13:08:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:08,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893317186] [2020-11-22 13:08:08,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:08,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:08,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308452861] [2020-11-22 13:08:08,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:08,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:08,765 INFO L87 Difference]: Start difference. First operand 35 states and 62 transitions. Second operand 4 states. [2020-11-22 13:08:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:08,803 INFO L93 Difference]: Finished difference Result 65 states and 114 transitions. [2020-11-22 13:08:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:08,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 13:08:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:08,806 INFO L225 Difference]: With dead ends: 65 [2020-11-22 13:08:08,806 INFO L226 Difference]: Without dead ends: 63 [2020-11-22 13:08:08,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-22 13:08:08,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2020-11-22 13:08:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 61 transitions. [2020-11-22 13:08:08,812 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 61 transitions. Word has length 8 [2020-11-22 13:08:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:08,812 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 61 transitions. [2020-11-22 13:08:08,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 61 transitions. [2020-11-22 13:08:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:08:08,813 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:08,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:08,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:08:08,813 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:08,814 INFO L82 PathProgramCache]: Analyzing trace with hash 891918144, now seen corresponding path program 1 times [2020-11-22 13:08:08,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:08,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130073142] [2020-11-22 13:08:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:08,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130073142] [2020-11-22 13:08:08,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:08,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:08,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787253191] [2020-11-22 13:08:08,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:08,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:08,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:08,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:08,895 INFO L87 Difference]: Start difference. First operand 35 states and 61 transitions. Second operand 4 states. [2020-11-22 13:08:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:08,929 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2020-11-22 13:08:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:08,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 13:08:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:08,931 INFO L225 Difference]: With dead ends: 63 [2020-11-22 13:08:08,931 INFO L226 Difference]: Without dead ends: 61 [2020-11-22 13:08:08,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-22 13:08:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2020-11-22 13:08:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 60 transitions. [2020-11-22 13:08:08,940 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 60 transitions. Word has length 9 [2020-11-22 13:08:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:08,940 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 60 transitions. [2020-11-22 13:08:08,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 60 transitions. [2020-11-22 13:08:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:08:08,941 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:08,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:08,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:08:08,942 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1879871439, now seen corresponding path program 1 times [2020-11-22 13:08:08,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:08,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244168087] [2020-11-22 13:08:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244168087] [2020-11-22 13:08:09,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493171959] [2020-11-22 13:08:09,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,013 INFO L87 Difference]: Start difference. First operand 35 states and 60 transitions. Second operand 4 states. [2020-11-22 13:08:09,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,045 INFO L93 Difference]: Finished difference Result 61 states and 104 transitions. [2020-11-22 13:08:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-22 13:08:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,047 INFO L225 Difference]: With dead ends: 61 [2020-11-22 13:08:09,048 INFO L226 Difference]: Without dead ends: 59 [2020-11-22 13:08:09,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-22 13:08:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-11-22 13:08:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 59 transitions. [2020-11-22 13:08:09,053 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 59 transitions. Word has length 10 [2020-11-22 13:08:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,053 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 59 transitions. [2020-11-22 13:08:09,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 59 transitions. [2020-11-22 13:08:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:08:09,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:09,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:09,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:08:09,054 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:09,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1853314443, now seen corresponding path program 1 times [2020-11-22 13:08:09,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:09,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390270818] [2020-11-22 13:08:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390270818] [2020-11-22 13:08:09,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340055522] [2020-11-22 13:08:09,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,122 INFO L87 Difference]: Start difference. First operand 35 states and 59 transitions. Second operand 4 states. [2020-11-22 13:08:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,155 INFO L93 Difference]: Finished difference Result 59 states and 99 transitions. [2020-11-22 13:08:09,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 13:08:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,158 INFO L225 Difference]: With dead ends: 59 [2020-11-22 13:08:09,158 INFO L226 Difference]: Without dead ends: 57 [2020-11-22 13:08:09,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-22 13:08:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2020-11-22 13:08:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2020-11-22 13:08:09,163 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 11 [2020-11-22 13:08:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,163 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2020-11-22 13:08:09,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,164 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2020-11-22 13:08:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:08:09,164 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:09,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:09,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:08:09,165 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:09,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1617959452, now seen corresponding path program 1 times [2020-11-22 13:08:09,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:09,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117504375] [2020-11-22 13:08:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117504375] [2020-11-22 13:08:09,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000743892] [2020-11-22 13:08:09,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,206 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand 4 states. [2020-11-22 13:08:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,227 INFO L93 Difference]: Finished difference Result 57 states and 94 transitions. [2020-11-22 13:08:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 13:08:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,229 INFO L225 Difference]: With dead ends: 57 [2020-11-22 13:08:09,229 INFO L226 Difference]: Without dead ends: 55 [2020-11-22 13:08:09,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-22 13:08:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2020-11-22 13:08:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 57 transitions. [2020-11-22 13:08:09,234 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 57 transitions. Word has length 12 [2020-11-22 13:08:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,234 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 57 transitions. [2020-11-22 13:08:09,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 57 transitions. [2020-11-22 13:08:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:08:09,235 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:09,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:09,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:08:09,235 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:09,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1383078314, now seen corresponding path program 1 times [2020-11-22 13:08:09,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:09,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084852940] [2020-11-22 13:08:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084852940] [2020-11-22 13:08:09,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567456631] [2020-11-22 13:08:09,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,284 INFO L87 Difference]: Start difference. First operand 35 states and 57 transitions. Second operand 4 states. [2020-11-22 13:08:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,306 INFO L93 Difference]: Finished difference Result 55 states and 89 transitions. [2020-11-22 13:08:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-22 13:08:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,307 INFO L225 Difference]: With dead ends: 55 [2020-11-22 13:08:09,307 INFO L226 Difference]: Without dead ends: 53 [2020-11-22 13:08:09,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-22 13:08:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2020-11-22 13:08:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 56 transitions. [2020-11-22 13:08:09,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 56 transitions. Word has length 13 [2020-11-22 13:08:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,312 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 56 transitions. [2020-11-22 13:08:09,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 56 transitions. [2020-11-22 13:08:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:08:09,312 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:09,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:09,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:08:09,322 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:09,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:09,323 INFO L82 PathProgramCache]: Analyzing trace with hash -74031111, now seen corresponding path program 1 times [2020-11-22 13:08:09,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:09,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024677326] [2020-11-22 13:08:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024677326] [2020-11-22 13:08:09,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498659461] [2020-11-22 13:08:09,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,366 INFO L87 Difference]: Start difference. First operand 35 states and 56 transitions. Second operand 4 states. [2020-11-22 13:08:09,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,391 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2020-11-22 13:08:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-22 13:08:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,393 INFO L225 Difference]: With dead ends: 53 [2020-11-22 13:08:09,393 INFO L226 Difference]: Without dead ends: 51 [2020-11-22 13:08:09,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-22 13:08:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2020-11-22 13:08:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 55 transitions. [2020-11-22 13:08:09,397 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 55 transitions. Word has length 14 [2020-11-22 13:08:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,397 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 55 transitions. [2020-11-22 13:08:09,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 55 transitions. [2020-11-22 13:08:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:08:09,398 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:09,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:09,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:08:09,399 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:09,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2000217311, now seen corresponding path program 1 times [2020-11-22 13:08:09,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:09,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390248683] [2020-11-22 13:08:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390248683] [2020-11-22 13:08:09,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130358342] [2020-11-22 13:08:09,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,444 INFO L87 Difference]: Start difference. First operand 35 states and 55 transitions. Second operand 4 states. [2020-11-22 13:08:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,489 INFO L93 Difference]: Finished difference Result 51 states and 79 transitions. [2020-11-22 13:08:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-22 13:08:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,490 INFO L225 Difference]: With dead ends: 51 [2020-11-22 13:08:09,491 INFO L226 Difference]: Without dead ends: 49 [2020-11-22 13:08:09,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-22 13:08:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2020-11-22 13:08:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 54 transitions. [2020-11-22 13:08:09,495 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 54 transitions. Word has length 15 [2020-11-22 13:08:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,495 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 54 transitions. [2020-11-22 13:08:09,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 54 transitions. [2020-11-22 13:08:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:08:09,496 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:09,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:09,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 13:08:09,499 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:09,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1877409294, now seen corresponding path program 1 times [2020-11-22 13:08:09,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:09,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412574937] [2020-11-22 13:08:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412574937] [2020-11-22 13:08:09,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034252049] [2020-11-22 13:08:09,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,561 INFO L87 Difference]: Start difference. First operand 35 states and 54 transitions. Second operand 4 states. [2020-11-22 13:08:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,590 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2020-11-22 13:08:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-22 13:08:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,592 INFO L225 Difference]: With dead ends: 49 [2020-11-22 13:08:09,592 INFO L226 Difference]: Without dead ends: 47 [2020-11-22 13:08:09,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-22 13:08:09,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-11-22 13:08:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 53 transitions. [2020-11-22 13:08:09,596 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 53 transitions. Word has length 16 [2020-11-22 13:08:09,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,596 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 53 transitions. [2020-11-22 13:08:09,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 53 transitions. [2020-11-22 13:08:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 13:08:09,597 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:09,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:09,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 13:08:09,597 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1929638892, now seen corresponding path program 1 times [2020-11-22 13:08:09,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:09,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089038819] [2020-11-22 13:08:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089038819] [2020-11-22 13:08:09,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675079225] [2020-11-22 13:08:09,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,664 INFO L87 Difference]: Start difference. First operand 35 states and 53 transitions. Second operand 4 states. [2020-11-22 13:08:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,698 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2020-11-22 13:08:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-22 13:08:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,699 INFO L225 Difference]: With dead ends: 47 [2020-11-22 13:08:09,699 INFO L226 Difference]: Without dead ends: 45 [2020-11-22 13:08:09,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-22 13:08:09,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2020-11-22 13:08:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 52 transitions. [2020-11-22 13:08:09,703 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 52 transitions. Word has length 17 [2020-11-22 13:08:09,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,703 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 52 transitions. [2020-11-22 13:08:09,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 52 transitions. [2020-11-22 13:08:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:08:09,704 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:09,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:09,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-22 13:08:09,705 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash 310951971, now seen corresponding path program 1 times [2020-11-22 13:08:09,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:09,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937533748] [2020-11-22 13:08:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937533748] [2020-11-22 13:08:09,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080553073] [2020-11-22 13:08:09,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,744 INFO L87 Difference]: Start difference. First operand 35 states and 52 transitions. Second operand 4 states. [2020-11-22 13:08:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,764 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2020-11-22 13:08:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-22 13:08:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,766 INFO L225 Difference]: With dead ends: 45 [2020-11-22 13:08:09,766 INFO L226 Difference]: Without dead ends: 43 [2020-11-22 13:08:09,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-22 13:08:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-11-22 13:08:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 51 transitions. [2020-11-22 13:08:09,769 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 51 transitions. Word has length 18 [2020-11-22 13:08:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,770 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 51 transitions. [2020-11-22 13:08:09,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 51 transitions. [2020-11-22 13:08:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 13:08:09,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:09,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:09,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-22 13:08:09,771 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:09,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1049792329, now seen corresponding path program 1 times [2020-11-22 13:08:09,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:09,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032823103] [2020-11-22 13:08:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032823103] [2020-11-22 13:08:09,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455509777] [2020-11-22 13:08:09,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,808 INFO L87 Difference]: Start difference. First operand 35 states and 51 transitions. Second operand 4 states. [2020-11-22 13:08:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,849 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2020-11-22 13:08:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-22 13:08:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,851 INFO L225 Difference]: With dead ends: 43 [2020-11-22 13:08:09,851 INFO L226 Difference]: Without dead ends: 41 [2020-11-22 13:08:09,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-22 13:08:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-11-22 13:08:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:08:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2020-11-22 13:08:09,854 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 19 [2020-11-22 13:08:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,855 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2020-11-22 13:08:09,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2020-11-22 13:08:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-22 13:08:09,856 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:09,856 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] [2020-11-22 13:08:09,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-22 13:08:09,856 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1815960008, now seen corresponding path program 1 times [2020-11-22 13:08:09,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:09,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944099448] [2020-11-22 13:08:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:09,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944099448] [2020-11-22 13:08:09,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:09,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:08:09,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269308017] [2020-11-22 13:08:09,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:09,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:09,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:09,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,899 INFO L87 Difference]: Start difference. First operand 35 states and 50 transitions. Second operand 4 states. [2020-11-22 13:08:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:09,924 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2020-11-22 13:08:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:09,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-22 13:08:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:09,924 INFO L225 Difference]: With dead ends: 37 [2020-11-22 13:08:09,925 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:08:09,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:08:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:08:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:08:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:08:09,926 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-11-22 13:08:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:09,926 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:08:09,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:08:09,926 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:08:09,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-22 13:08:09,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:08:09,944 INFO L277 CegarLoopResult]: At program point L234(lines 6 235) the Hoare annotation is: true [2020-11-22 13:08:09,944 INFO L274 CegarLoopResult]: For program point L201(line 201) no Hoare annotation was computed. [2020-11-22 13:08:09,945 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:08:09,945 INFO L274 CegarLoopResult]: For program point L185-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,945 INFO L274 CegarLoopResult]: For program point L186(line 186) no Hoare annotation was computed. [2020-11-22 13:08:09,945 INFO L274 CegarLoopResult]: For program point L170-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,945 INFO L274 CegarLoopResult]: For program point L220-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,945 INFO L274 CegarLoopResult]: For program point L171(line 171) no Hoare annotation was computed. [2020-11-22 13:08:09,945 INFO L274 CegarLoopResult]: For program point L221(line 221) no Hoare annotation was computed. [2020-11-22 13:08:09,945 INFO L274 CegarLoopResult]: For program point L155-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,946 INFO L274 CegarLoopResult]: For program point L205-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,946 INFO L274 CegarLoopResult]: For program point L156(line 156) no Hoare annotation was computed. [2020-11-22 13:08:09,946 INFO L274 CegarLoopResult]: For program point L206(line 206) no Hoare annotation was computed. [2020-11-22 13:08:09,946 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:08:09,946 INFO L274 CegarLoopResult]: For program point L190-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,946 INFO L274 CegarLoopResult]: For program point L58(lines 58 60) no Hoare annotation was computed. [2020-11-22 13:08:09,946 INFO L274 CegarLoopResult]: For program point L191(line 191) no Hoare annotation was computed. [2020-11-22 13:08:09,946 INFO L274 CegarLoopResult]: For program point L175-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,947 INFO L277 CegarLoopResult]: At program point L225-1(lines 56 230) the Hoare annotation is: true [2020-11-22 13:08:09,947 INFO L274 CegarLoopResult]: For program point L176(line 176) no Hoare annotation was computed. [2020-11-22 13:08:09,947 INFO L274 CegarLoopResult]: For program point L226(line 226) no Hoare annotation was computed. [2020-11-22 13:08:09,947 INFO L270 CegarLoopResult]: At program point L226-1(lines 7 235) the Hoare annotation is: false [2020-11-22 13:08:09,947 INFO L274 CegarLoopResult]: For program point L160-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,947 INFO L274 CegarLoopResult]: For program point L210-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,947 INFO L274 CegarLoopResult]: For program point L161(line 161) no Hoare annotation was computed. [2020-11-22 13:08:09,948 INFO L274 CegarLoopResult]: For program point L211(line 211) no Hoare annotation was computed. [2020-11-22 13:08:09,948 INFO L274 CegarLoopResult]: For program point L195-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,948 INFO L274 CegarLoopResult]: For program point L196(line 196) no Hoare annotation was computed. [2020-11-22 13:08:09,948 INFO L274 CegarLoopResult]: For program point L180-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,948 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-22 13:08:09,948 INFO L274 CegarLoopResult]: For program point L181(line 181) no Hoare annotation was computed. [2020-11-22 13:08:09,948 INFO L277 CegarLoopResult]: At program point L231(lines 7 235) the Hoare annotation is: true [2020-11-22 13:08:09,949 INFO L274 CegarLoopResult]: For program point L165-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,949 INFO L274 CegarLoopResult]: For program point L215-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,949 INFO L274 CegarLoopResult]: For program point L149-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,949 INFO L274 CegarLoopResult]: For program point L166(line 166) no Hoare annotation was computed. [2020-11-22 13:08:09,949 INFO L274 CegarLoopResult]: For program point L216(line 216) no Hoare annotation was computed. [2020-11-22 13:08:09,949 INFO L274 CegarLoopResult]: For program point L200-1(lines 56 230) no Hoare annotation was computed. [2020-11-22 13:08:09,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:08:09 BoogieIcfgContainer [2020-11-22 13:08:09,963 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:08:09,964 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:08:09,964 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:08:09,964 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:08:09,965 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:07" (3/4) ... [2020-11-22 13:08:09,968 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:08:09,990 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2020-11-22 13:08:09,991 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-22 13:08:09,991 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:08:09,992 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:08:10,103 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2fd841a3-fcd0-46be-adb2-4b7e56421117/bin/utaipan/witness.graphml [2020-11-22 13:08:10,103 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:08:10,106 INFO L168 Benchmark]: Toolchain (without parser) took 3545.62 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 73.0 MB in the beginning and 83.0 MB in the end (delta: -10.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:10,106 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 75.5 MB. Free memory is still 36.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:08:10,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.97 ms. Allocated memory is still 104.9 MB. Free memory was 72.8 MB in the beginning and 81.1 MB in the end (delta: -8.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:10,107 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.75 ms. Allocated memory is still 104.9 MB. Free memory was 81.1 MB in the beginning and 79.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:08:10,107 INFO L168 Benchmark]: Boogie Preprocessor took 31.05 ms. Allocated memory is still 104.9 MB. Free memory was 79.5 MB in the beginning and 77.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:10,108 INFO L168 Benchmark]: RCFGBuilder took 1041.32 ms. Allocated memory is still 104.9 MB. Free memory was 77.9 MB in the beginning and 70.9 MB in the end (delta: 7.0 MB). Peak memory consumption was 48.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:10,108 INFO L168 Benchmark]: TraceAbstraction took 2001.22 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 70.9 MB in the beginning and 88.3 MB in the end (delta: -17.4 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:10,109 INFO L168 Benchmark]: Witness Printer took 139.60 ms. Allocated memory is still 125.8 MB. Free memory was 88.3 MB in the beginning and 83.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:10,111 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 75.5 MB. Free memory is still 36.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.97 ms. Allocated memory is still 104.9 MB. Free memory was 72.8 MB in the beginning and 81.1 MB in the end (delta: -8.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.75 ms. Allocated memory is still 104.9 MB. Free memory was 81.1 MB in the beginning and 79.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.05 ms. Allocated memory is still 104.9 MB. Free memory was 79.5 MB in the beginning and 77.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1041.32 ms. Allocated memory is still 104.9 MB. Free memory was 77.9 MB in the beginning and 70.9 MB in the end (delta: 7.0 MB). Peak memory consumption was 48.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2001.22 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 70.9 MB in the beginning and 88.3 MB in the end (delta: -17.4 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. * Witness Printer took 139.60 ms. Allocated memory is still 125.8 MB. Free memory was 88.3 MB in the beginning and 83.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 815 SDtfs, 692 SDslu, 1219 SDs, 0 SdLazy, 135 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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, 15 MinimizatonAttempts, 266 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 13120 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...