./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label22.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_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label22.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/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 e337846cb6422c78c02a79ae7748bdbce67db4c4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:34:31,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:34:32,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:34:32,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:34:32,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:34:32,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:34:32,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:34:32,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:34:32,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:34:32,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:34:32,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:34:32,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:34:32,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:34:32,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:34:32,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:34:32,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:34:32,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:34:32,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:34:32,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:34:32,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:34:32,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:34:32,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:34:32,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:34:32,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:34:32,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:34:32,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:34:32,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:34:32,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:34:32,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:34:32,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:34:32,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:34:32,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:34:32,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:34:32,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:34:32,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:34:32,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:34:32,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:34:32,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:34:32,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:34:32,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:34:32,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:34:32,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:34:32,183 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:34:32,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:34:32,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:34:32,188 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:34:32,188 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:34:32,189 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:34:32,189 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:34:32,189 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:34:32,189 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:34:32,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:34:32,191 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:34:32,191 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:34:32,191 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:34:32,192 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:34:32,192 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:34:32,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:34:32,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:34:32,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:34:32,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:34:32,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:34:32,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:34:32,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:34:32,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:34:32,195 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:34:32,195 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:34:32,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:34:32,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:34:32,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:34:32,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:34:32,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:34:32,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:34:32,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:34:32,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:34:32,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:34:32,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:34:32,199 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:34:32,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:34:32,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:34:32,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:34:32,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:34:32,201 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_d1770e75-af3b-4fae-a076-f45ec8a18bda/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e337846cb6422c78c02a79ae7748bdbce67db4c4 [2020-11-28 07:34:32,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:34:32,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:34:32,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:34:32,532 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:34:32,532 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:34:32,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label22.c [2020-11-28 07:34:32,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/data/8c02aa00e/1ad5b12822b549c5b816819b40196620/FLAG4a0fc2fc9 [2020-11-28 07:34:33,149 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:34:33,150 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/sv-benchmarks/c/eca-rers2012/Problem01_label22.c [2020-11-28 07:34:33,164 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/data/8c02aa00e/1ad5b12822b549c5b816819b40196620/FLAG4a0fc2fc9 [2020-11-28 07:34:33,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/data/8c02aa00e/1ad5b12822b549c5b816819b40196620 [2020-11-28 07:34:33,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:34:33,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:34:33,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:34:33,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:34:33,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:34:33,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:34:33" (1/1) ... [2020-11-28 07:34:33,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f4f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:33, skipping insertion in model container [2020-11-28 07:34:33,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:34:33" (1/1) ... [2020-11-28 07:34:33,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:34:33,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:34:33,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:34:33,927 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:34:34,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:34:34,074 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:34:34,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34 WrapperNode [2020-11-28 07:34:34,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:34:34,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:34:34,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:34:34,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:34:34,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (1/1) ... [2020-11-28 07:34:34,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (1/1) ... [2020-11-28 07:34:34,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:34:34,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:34:34,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:34:34,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:34:34,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (1/1) ... [2020-11-28 07:34:34,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (1/1) ... [2020-11-28 07:34:34,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (1/1) ... [2020-11-28 07:34:34,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (1/1) ... [2020-11-28 07:34:34,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (1/1) ... [2020-11-28 07:34:34,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (1/1) ... [2020-11-28 07:34:34,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (1/1) ... [2020-11-28 07:34:34,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:34:34,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:34:34,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:34:34,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:34:34,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/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 [2020-11-28 07:34:34,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:34:34,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:34:34,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:34:34,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:34:36,787 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:34:36,787 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:34:36,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:36 BoogieIcfgContainer [2020-11-28 07:34:36,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:34:36,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:34:36,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:34:36,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:34:36,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:34:33" (1/3) ... [2020-11-28 07:34:36,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c7ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:34:36, skipping insertion in model container [2020-11-28 07:34:36,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:34" (2/3) ... [2020-11-28 07:34:36,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c7ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:34:36, skipping insertion in model container [2020-11-28 07:34:36,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:36" (3/3) ... [2020-11-28 07:34:36,800 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label22.c [2020-11-28 07:34:36,814 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:34:36,819 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:34:36,830 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:34:36,864 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:34:36,864 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:34:36,864 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:34:36,864 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:34:36,864 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:34:36,864 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:34:36,864 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:34:36,865 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:34:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:34:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:34:36,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:36,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:36,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:36,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1520714349, now seen corresponding path program 1 times [2020-11-28 07:34:36,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:36,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229593551] [2020-11-28 07:34:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:34:37,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229593551] [2020-11-28 07:34:37,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:37,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:34:37,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003548110] [2020-11-28 07:34:37,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:34:37,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:37,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:34:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:37,446 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 4 states. [2020-11-28 07:34:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:38,366 INFO L93 Difference]: Finished difference Result 297 states and 569 transitions. [2020-11-28 07:34:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:34:38,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-11-28 07:34:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:38,380 INFO L225 Difference]: With dead ends: 297 [2020-11-28 07:34:38,381 INFO L226 Difference]: Without dead ends: 216 [2020-11-28 07:34:38,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:34:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-11-28 07:34:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-11-28 07:34:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-28 07:34:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 336 transitions. [2020-11-28 07:34:38,454 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 336 transitions. Word has length 71 [2020-11-28 07:34:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:38,456 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 336 transitions. [2020-11-28 07:34:38,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:34:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 336 transitions. [2020-11-28 07:34:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-28 07:34:38,462 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:38,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:38,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:34:38,463 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:38,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1832084420, now seen corresponding path program 1 times [2020-11-28 07:34:38,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:38,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917237143] [2020-11-28 07:34:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:34:38,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917237143] [2020-11-28 07:34:38,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:38,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:34:38,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197956862] [2020-11-28 07:34:38,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:34:38,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:38,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:34:38,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:38,697 INFO L87 Difference]: Start difference. First operand 216 states and 336 transitions. Second operand 4 states. [2020-11-28 07:34:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:39,373 INFO L93 Difference]: Finished difference Result 500 states and 848 transitions. [2020-11-28 07:34:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:34:39,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-28 07:34:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:39,378 INFO L225 Difference]: With dead ends: 500 [2020-11-28 07:34:39,378 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:34:39,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:34:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 216. [2020-11-28 07:34:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-28 07:34:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 293 transitions. [2020-11-28 07:34:39,403 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 293 transitions. Word has length 78 [2020-11-28 07:34:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:39,404 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 293 transitions. [2020-11-28 07:34:39,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:34:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 293 transitions. [2020-11-28 07:34:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:34:39,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:39,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:39,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:34:39,411 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1009058376, now seen corresponding path program 1 times [2020-11-28 07:34:39,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:39,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328237095] [2020-11-28 07:34:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:34:39,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328237095] [2020-11-28 07:34:39,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:39,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:34:39,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331508047] [2020-11-28 07:34:39,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:34:39,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:39,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:34:39,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:39,548 INFO L87 Difference]: Start difference. First operand 216 states and 293 transitions. Second operand 4 states. [2020-11-28 07:34:40,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:40,036 INFO L93 Difference]: Finished difference Result 573 states and 802 transitions. [2020-11-28 07:34:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:34:40,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-11-28 07:34:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:40,040 INFO L225 Difference]: With dead ends: 573 [2020-11-28 07:34:40,040 INFO L226 Difference]: Without dead ends: 358 [2020-11-28 07:34:40,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-11-28 07:34:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2020-11-28 07:34:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-11-28 07:34:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 483 transitions. [2020-11-28 07:34:40,069 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 483 transitions. Word has length 86 [2020-11-28 07:34:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:40,069 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 483 transitions. [2020-11-28 07:34:40,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:34:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 483 transitions. [2020-11-28 07:34:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-28 07:34:40,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:40,077 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:40,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:34:40,077 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:40,078 INFO L82 PathProgramCache]: Analyzing trace with hash 554923454, now seen corresponding path program 1 times [2020-11-28 07:34:40,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:40,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823752995] [2020-11-28 07:34:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-28 07:34:40,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823752995] [2020-11-28 07:34:40,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:40,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:34:40,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753608477] [2020-11-28 07:34:40,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:34:40,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:40,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:34:40,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:34:40,224 INFO L87 Difference]: Start difference. First operand 358 states and 483 transitions. Second operand 3 states. [2020-11-28 07:34:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:40,596 INFO L93 Difference]: Finished difference Result 999 states and 1339 transitions. [2020-11-28 07:34:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:34:40,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-11-28 07:34:40,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:40,601 INFO L225 Difference]: With dead ends: 999 [2020-11-28 07:34:40,601 INFO L226 Difference]: Without dead ends: 642 [2020-11-28 07:34:40,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:34:40,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-11-28 07:34:40,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 571. [2020-11-28 07:34:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-28 07:34:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 778 transitions. [2020-11-28 07:34:40,631 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 778 transitions. Word has length 111 [2020-11-28 07:34:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:40,632 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 778 transitions. [2020-11-28 07:34:40,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:34:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 778 transitions. [2020-11-28 07:34:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-28 07:34:40,637 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:40,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:40,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:34:40,641 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:40,642 INFO L82 PathProgramCache]: Analyzing trace with hash 73609658, now seen corresponding path program 1 times [2020-11-28 07:34:40,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:40,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352914808] [2020-11-28 07:34:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 07:34:40,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352914808] [2020-11-28 07:34:40,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:40,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:34:40,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997118550] [2020-11-28 07:34:40,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:34:40,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:40,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:34:40,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:40,781 INFO L87 Difference]: Start difference. First operand 571 states and 778 transitions. Second operand 4 states. [2020-11-28 07:34:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:41,302 INFO L93 Difference]: Finished difference Result 1283 states and 1752 transitions. [2020-11-28 07:34:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:34:41,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-11-28 07:34:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:41,307 INFO L225 Difference]: With dead ends: 1283 [2020-11-28 07:34:41,307 INFO L226 Difference]: Without dead ends: 713 [2020-11-28 07:34:41,308 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 [2020-11-28 07:34:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-11-28 07:34:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 642. [2020-11-28 07:34:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-11-28 07:34:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 857 transitions. [2020-11-28 07:34:41,341 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 857 transitions. Word has length 120 [2020-11-28 07:34:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:41,343 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 857 transitions. [2020-11-28 07:34:41,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:34:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 857 transitions. [2020-11-28 07:34:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-28 07:34:41,348 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:41,348 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:41,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:34:41,349 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:41,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1828608471, now seen corresponding path program 1 times [2020-11-28 07:34:41,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:41,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671049428] [2020-11-28 07:34:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-28 07:34:41,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671049428] [2020-11-28 07:34:41,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:41,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:34:41,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527193820] [2020-11-28 07:34:41,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:34:41,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:41,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:34:41,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:41,490 INFO L87 Difference]: Start difference. First operand 642 states and 857 transitions. Second operand 4 states. [2020-11-28 07:34:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:42,044 INFO L93 Difference]: Finished difference Result 1496 states and 1975 transitions. [2020-11-28 07:34:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:34:42,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-11-28 07:34:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:42,051 INFO L225 Difference]: With dead ends: 1496 [2020-11-28 07:34:42,051 INFO L226 Difference]: Without dead ends: 855 [2020-11-28 07:34:42,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-11-28 07:34:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 784. [2020-11-28 07:34:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-28 07:34:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1021 transitions. [2020-11-28 07:34:42,078 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1021 transitions. Word has length 134 [2020-11-28 07:34:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:42,078 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1021 transitions. [2020-11-28 07:34:42,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:34:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1021 transitions. [2020-11-28 07:34:42,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-11-28 07:34:42,088 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:42,088 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:42,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:34:42,089 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:42,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1124330168, now seen corresponding path program 1 times [2020-11-28 07:34:42,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:42,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172859654] [2020-11-28 07:34:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-11-28 07:34:42,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172859654] [2020-11-28 07:34:42,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:42,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:34:42,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026449402] [2020-11-28 07:34:42,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:34:42,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:42,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:34:42,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:34:42,266 INFO L87 Difference]: Start difference. First operand 784 states and 1021 transitions. Second operand 3 states. [2020-11-28 07:34:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:42,719 INFO L93 Difference]: Finished difference Result 1709 states and 2194 transitions. [2020-11-28 07:34:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:34:42,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 167 [2020-11-28 07:34:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:42,725 INFO L225 Difference]: With dead ends: 1709 [2020-11-28 07:34:42,726 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:34:42,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:34:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:34:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 784. [2020-11-28 07:34:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-28 07:34:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1015 transitions. [2020-11-28 07:34:42,751 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1015 transitions. Word has length 167 [2020-11-28 07:34:42,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:42,752 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1015 transitions. [2020-11-28 07:34:42,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:34:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1015 transitions. [2020-11-28 07:34:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-11-28 07:34:42,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:42,756 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:42,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:34:42,757 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:42,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:42,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1710313184, now seen corresponding path program 1 times [2020-11-28 07:34:42,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:42,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907800301] [2020-11-28 07:34:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-11-28 07:34:43,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907800301] [2020-11-28 07:34:43,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:43,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:34:43,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027450964] [2020-11-28 07:34:43,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:34:43,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:43,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:34:43,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:43,004 INFO L87 Difference]: Start difference. First operand 784 states and 1015 transitions. Second operand 4 states. [2020-11-28 07:34:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:43,660 INFO L93 Difference]: Finished difference Result 1733 states and 2206 transitions. [2020-11-28 07:34:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:34:43,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 210 [2020-11-28 07:34:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:43,666 INFO L225 Difference]: With dead ends: 1733 [2020-11-28 07:34:43,667 INFO L226 Difference]: Without dead ends: 950 [2020-11-28 07:34:43,668 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 [2020-11-28 07:34:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-11-28 07:34:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 855. [2020-11-28 07:34:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-11-28 07:34:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1055 transitions. [2020-11-28 07:34:43,693 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1055 transitions. Word has length 210 [2020-11-28 07:34:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:43,694 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1055 transitions. [2020-11-28 07:34:43,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:34:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1055 transitions. [2020-11-28 07:34:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-11-28 07:34:43,698 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:43,699 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:43,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:34:43,699 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:43,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1559669433, now seen corresponding path program 1 times [2020-11-28 07:34:43,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:43,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960774301] [2020-11-28 07:34:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-11-28 07:34:43,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960774301] [2020-11-28 07:34:43,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:43,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:34:43,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403027916] [2020-11-28 07:34:43,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:34:43,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:43,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:34:43,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:34:43,852 INFO L87 Difference]: Start difference. First operand 855 states and 1055 transitions. Second operand 3 states. [2020-11-28 07:34:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:44,211 INFO L93 Difference]: Finished difference Result 1851 states and 2331 transitions. [2020-11-28 07:34:44,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:34:44,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 223 [2020-11-28 07:34:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:44,221 INFO L225 Difference]: With dead ends: 1851 [2020-11-28 07:34:44,221 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:34:44,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:34:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:34:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2020-11-28 07:34:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:34:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1230 transitions. [2020-11-28 07:34:44,252 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1230 transitions. Word has length 223 [2020-11-28 07:34:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:44,253 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1230 transitions. [2020-11-28 07:34:44,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:34:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1230 transitions. [2020-11-28 07:34:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-11-28 07:34:44,261 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:44,261 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:44,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:34:44,262 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1492291223, now seen corresponding path program 1 times [2020-11-28 07:34:44,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:44,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746096330] [2020-11-28 07:34:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-11-28 07:34:44,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746096330] [2020-11-28 07:34:44,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501961157] [2020-11-28 07:34:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:34:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:44,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:34:44,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:34:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-11-28 07:34:44,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:34:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-11-28 07:34:45,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:34:45,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-28 07:34:45,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101373453] [2020-11-28 07:34:45,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:34:45,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:45,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:34:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:34:45,021 INFO L87 Difference]: Start difference. First operand 997 states and 1230 transitions. Second operand 3 states. [2020-11-28 07:34:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:45,336 INFO L93 Difference]: Finished difference Result 2277 states and 2800 transitions. [2020-11-28 07:34:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:34:45,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2020-11-28 07:34:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:45,344 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:34:45,344 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:34:45,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 463 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:34:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:34:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1068. [2020-11-28 07:34:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:34:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1324 transitions. [2020-11-28 07:34:45,383 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1324 transitions. Word has length 232 [2020-11-28 07:34:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:45,384 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1324 transitions. [2020-11-28 07:34:45,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:34:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1324 transitions. [2020-11-28 07:34:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-11-28 07:34:45,389 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:45,389 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:45,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-28 07:34:45,617 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash 637075289, now seen corresponding path program 1 times [2020-11-28 07:34:45,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:45,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003527269] [2020-11-28 07:34:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-28 07:34:45,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003527269] [2020-11-28 07:34:45,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:45,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:34:45,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009460554] [2020-11-28 07:34:45,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:34:45,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:45,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:34:45,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:34:45,807 INFO L87 Difference]: Start difference. First operand 1068 states and 1324 transitions. Second operand 3 states. [2020-11-28 07:34:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:46,173 INFO L93 Difference]: Finished difference Result 2206 states and 2763 transitions. [2020-11-28 07:34:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:34:46,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-11-28 07:34:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:46,180 INFO L225 Difference]: With dead ends: 2206 [2020-11-28 07:34:46,181 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:34:46,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:34:46,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:34:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2020-11-28 07:34:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:34:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1322 transitions. [2020-11-28 07:34:46,214 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1322 transitions. Word has length 235 [2020-11-28 07:34:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:46,215 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1322 transitions. [2020-11-28 07:34:46,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:34:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1322 transitions. [2020-11-28 07:34:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-11-28 07:34:46,220 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:46,220 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:46,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:34:46,220 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash -588452619, now seen corresponding path program 1 times [2020-11-28 07:34:46,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:46,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373837314] [2020-11-28 07:34:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 256 proven. 142 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-28 07:34:46,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373837314] [2020-11-28 07:34:46,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674452044] [2020-11-28 07:34:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:34:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:34:46,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:34:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-11-28 07:34:46,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:34:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-11-28 07:34:46,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:34:46,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2020-11-28 07:34:46,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454832889] [2020-11-28 07:34:46,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:34:46,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:46,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:34:46,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:34:46,902 INFO L87 Difference]: Start difference. First operand 1068 states and 1322 transitions. Second operand 3 states. [2020-11-28 07:34:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:47,235 INFO L93 Difference]: Finished difference Result 2346 states and 2883 transitions. [2020-11-28 07:34:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:34:47,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-11-28 07:34:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:47,236 INFO L225 Difference]: With dead ends: 2346 [2020-11-28 07:34:47,236 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:34:47,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 481 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:34:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:34:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:34:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:34:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:34:47,239 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 241 [2020-11-28 07:34:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:47,240 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:34:47,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:34:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:34:47,240 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:34:47,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 07:34:47,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:34:47,713 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:34:47,713 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:34:47,713 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:34:47,713 INFO L274 CegarLoopResult]: For program point L566-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:34:47,713 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:34:47,713 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:34:47,713 INFO L274 CegarLoopResult]: For program point L567(line 567) no Hoare annotation was computed. [2020-11-28 07:34:47,713 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:34:47,713 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:34:47,714 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:34:47,715 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:34:47,716 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:34:47,716 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:34:47,716 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:34:47,716 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:34:47,716 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:34:47,716 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse2 (not (= ~a7~0 1))) (.cse1 (= ~a16~0 6)) (.cse3 (<= ~a8~0 13)) (.cse0 (= ~a21~0 1)) (.cse4 (<= ~a16~0 5))) (or (and .cse0 .cse1 .cse2 (<= 15 ~a8~0)) (and .cse0 (= ~a20~0 1) .cse2) (and .cse1 .cse3) (and .cse4 .cse3) (and .cse0 .cse4))) [2020-11-28 07:34:47,716 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:34:47,716 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:34:47,716 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:34:47,716 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:34:47,717 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse2 (not (= ~a7~0 1))) (.cse1 (= ~a16~0 6)) (.cse3 (<= ~a8~0 13)) (.cse0 (= ~a21~0 1)) (.cse4 (<= ~a16~0 5))) (or (and .cse0 .cse1 .cse2 (<= 15 ~a8~0)) (and .cse0 (= ~a20~0 1) .cse2) (and .cse1 .cse3) (and .cse4 .cse3) (and .cse0 .cse4))) [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point L563-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:34:47,718 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:34:47,719 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:34:47,719 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:34:47,719 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:34:47,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:34:47 BoogieIcfgContainer [2020-11-28 07:34:47,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:34:47,753 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:34:47,753 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:34:47,754 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:34:47,754 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:36" (3/4) ... [2020-11-28 07:34:47,757 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:34:47,782 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-28 07:34:47,790 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:34:47,791 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:34:47,793 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:34:47,918 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d1770e75-af3b-4fae-a076-f45ec8a18bda/bin/utaipan/witness.graphml [2020-11-28 07:34:47,918 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:34:47,920 INFO L168 Benchmark]: Toolchain (without parser) took 14491.70 ms. Allocated memory was 92.3 MB in the beginning and 381.7 MB in the end (delta: 289.4 MB). Free memory was 70.8 MB in the beginning and 155.5 MB in the end (delta: -84.6 MB). Peak memory consumption was 204.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:47,920 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 75.5 MB. Free memory was 54.7 MB in the beginning and 54.7 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:34:47,920 INFO L168 Benchmark]: CACSL2BoogieTranslator took 647.16 ms. Allocated memory is still 92.3 MB. Free memory was 70.5 MB in the beginning and 51.8 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:47,921 INFO L168 Benchmark]: Boogie Procedure Inliner took 106.19 ms. Allocated memory is still 92.3 MB. Free memory was 51.8 MB in the beginning and 46.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:47,921 INFO L168 Benchmark]: Boogie Preprocessor took 85.08 ms. Allocated memory is still 92.3 MB. Free memory was 46.0 MB in the beginning and 41.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:47,922 INFO L168 Benchmark]: RCFGBuilder took 2521.82 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 41.4 MB in the beginning and 87.4 MB in the end (delta: -46.0 MB). Peak memory consumption was 40.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:47,922 INFO L168 Benchmark]: TraceAbstraction took 10960.62 ms. Allocated memory was 121.6 MB in the beginning and 381.7 MB in the end (delta: 260.0 MB). Free memory was 87.4 MB in the beginning and 170.3 MB in the end (delta: -82.9 MB). Peak memory consumption was 177.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:47,922 INFO L168 Benchmark]: Witness Printer took 164.93 ms. Allocated memory is still 381.7 MB. Free memory was 170.3 MB in the beginning and 155.5 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:47,926 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 75.5 MB. Free memory was 54.7 MB in the beginning and 54.7 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 647.16 ms. Allocated memory is still 92.3 MB. Free memory was 70.5 MB in the beginning and 51.8 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 106.19 ms. Allocated memory is still 92.3 MB. Free memory was 51.8 MB in the beginning and 46.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 85.08 ms. Allocated memory is still 92.3 MB. Free memory was 46.0 MB in the beginning and 41.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2521.82 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 41.4 MB in the beginning and 87.4 MB in the end (delta: -46.0 MB). Peak memory consumption was 40.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10960.62 ms. Allocated memory was 121.6 MB in the beginning and 381.7 MB in the end (delta: 260.0 MB). Free memory was 87.4 MB in the beginning and 170.3 MB in the end (delta: -82.9 MB). Peak memory consumption was 177.1 MB. Max. memory is 16.1 GB. * Witness Printer took 164.93 ms. Allocated memory is still 381.7 MB. Free memory was 170.3 MB in the beginning and 155.5 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 40]: Loop Invariant Derived loop invariant: ((((((a21 == 1 && a16 == 6) && !(a7 == 1)) && 15 <= a8) || ((a21 == 1 && a20 == 1) && !(a7 == 1))) || (a16 == 6 && a8 <= 13)) || (a16 <= 5 && a8 <= 13)) || (a21 == 1 && a16 <= 5) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((a21 == 1 && a16 == 6) && !(a7 == 1)) && 15 <= a8) || ((a21 == 1 && a20 == 1) && !(a7 == 1))) || (a16 == 6 && a8 <= 13)) || (a16 <= 5 && a8 <= 13)) || (a21 == 1 && a16 <= 5) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.5s, OverallIterations: 12, TraceHistogramMax: 8, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 593 SDtfs, 1109 SDslu, 70 SDs, 0 SdLazy, 3016 SolverSat, 789 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 987 GetRequests, 960 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1068occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 805 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 44 NumberOfFragments, 95 HoareAnnotationTreeSize, 3 FomulaSimplifications, 13134 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 148 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 2381 NumberOfCodeBlocks, 2381 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2838 ConstructedInterpolants, 0 QuantifiedInterpolants, 1593616 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1107 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 16 InterpolantComputations, 14 PerfectInterpolantSequences, 3746/3943 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...