./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.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_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/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 c6d41d2a2a28e240d9196f063199b00c22e981e9 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:07:24,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:07:24,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:07:24,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:07:24,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:07:24,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:07:24,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:07:24,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:07:24,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:07:24,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:07:24,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:07:24,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:07:24,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:07:24,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:07:24,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:07:24,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:07:24,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:07:24,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:07:24,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:07:24,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:07:24,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:07:24,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:07:24,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:07:24,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:07:24,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:07:24,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:07:24,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:07:24,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:07:24,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:07:24,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:07:24,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:07:24,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:07:24,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:07:24,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:07:24,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:07:24,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:07:24,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:07:24,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:07:24,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:07:24,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:07:24,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:07:24,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:07:24,297 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:07:24,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:07:24,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:07:24,300 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:07:24,300 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:07:24,300 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:07:24,301 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:07:24,301 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:07:24,301 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:07:24,301 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:07:24,302 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:07:24,302 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:07:24,303 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:07:24,303 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:07:24,303 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:07:24,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:07:24,304 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:07:24,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:07:24,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:07:24,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:07:24,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:07:24,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:07:24,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:07:24,305 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:07:24,305 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:07:24,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:07:24,305 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:07:24,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:07:24,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:07:24,306 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:07:24,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:07:24,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:07:24,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:07:24,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:07:24,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:07:24,307 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:07:24,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:07:24,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:07:24,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:07:24,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:07:24,308 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_463af213-fa88-451c-aa53-1e1c051f55bb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6d41d2a2a28e240d9196f063199b00c22e981e9 [2020-11-22 13:07:24,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:07:24,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:07:24,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:07:24,544 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:07:24,545 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:07:24,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/../../sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c [2020-11-22 13:07:24,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/data/74e4ea6e8/096bcdc40a7343bdb150d5d5b0f30b81/FLAG54aa89fbc [2020-11-22 13:07:25,064 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:07:25,067 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c [2020-11-22 13:07:25,075 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/data/74e4ea6e8/096bcdc40a7343bdb150d5d5b0f30b81/FLAG54aa89fbc [2020-11-22 13:07:25,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/data/74e4ea6e8/096bcdc40a7343bdb150d5d5b0f30b81 [2020-11-22 13:07:25,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:07:25,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:07:25,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:25,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:07:25,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:07:25,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a4a47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25, skipping insertion in model container [2020-11-22 13:07:25,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:07:25,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:07:25,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:25,741 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:07:25,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:25,802 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:07:25,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25 WrapperNode [2020-11-22 13:07:25,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:25,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:07:25,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:07:25,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:07:25,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:07:25,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:07:25,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:07:25,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:07:25,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (1/1) ... [2020-11-22 13:07:25,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:07:25,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:07:25,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:07:25,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:07:25,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:07:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:07:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:07:25,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:07:25,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:07:26,518 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:07:26,518 INFO L298 CfgBuilder]: Removed 36 assume(true) statements. [2020-11-22 13:07:26,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:26 BoogieIcfgContainer [2020-11-22 13:07:26,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:07:26,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:07:26,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:07:26,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:07:26,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:07:25" (1/3) ... [2020-11-22 13:07:26,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c405a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:07:26, skipping insertion in model container [2020-11-22 13:07:26,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:25" (2/3) ... [2020-11-22 13:07:26,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c405a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:07:26, skipping insertion in model container [2020-11-22 13:07:26,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:26" (3/3) ... [2020-11-22 13:07:26,534 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i.v+cfa-reducer.c [2020-11-22 13:07:26,544 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:07:26,548 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-11-22 13:07:26,559 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-11-22 13:07:26,582 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:07:26,582 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:07:26,583 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:07:26,583 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:07:26,583 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:07:26,583 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:07:26,583 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:07:26,584 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:07:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-11-22 13:07:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:07:26,604 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:26,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:26,605 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:26,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:26,611 INFO L82 PathProgramCache]: Analyzing trace with hash 985033613, now seen corresponding path program 1 times [2020-11-22 13:07:26,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:26,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333828417] [2020-11-22 13:07:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:26,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333828417] [2020-11-22 13:07:26,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:26,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:07:26,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12257920] [2020-11-22 13:07:26,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:26,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:26,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:26,866 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 3 states. [2020-11-22 13:07:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:26,905 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-11-22 13:07:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:26,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-22 13:07:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:26,918 INFO L225 Difference]: With dead ends: 79 [2020-11-22 13:07:26,918 INFO L226 Difference]: Without dead ends: 71 [2020-11-22 13:07:26,931 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 [2020-11-22 13:07:26,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-22 13:07:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2020-11-22 13:07:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-22 13:07:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-11-22 13:07:26,985 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 8 [2020-11-22 13:07:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:26,986 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-11-22 13:07:26,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-11-22 13:07:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:07:26,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:26,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:26,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:07:26,989 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:26,993 INFO L82 PathProgramCache]: Analyzing trace with hash 471276979, now seen corresponding path program 1 times [2020-11-22 13:07:26,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:26,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41336336] [2020-11-22 13:07:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:27,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41336336] [2020-11-22 13:07:27,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:27,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:07:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29214022] [2020-11-22 13:07:27,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:27,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:27,126 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2020-11-22 13:07:27,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:27,225 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-11-22 13:07:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:27,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 13:07:27,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:27,228 INFO L225 Difference]: With dead ends: 72 [2020-11-22 13:07:27,229 INFO L226 Difference]: Without dead ends: 70 [2020-11-22 13:07:27,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-22 13:07:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-11-22 13:07:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-22 13:07:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-11-22 13:07:27,237 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 9 [2020-11-22 13:07:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:27,241 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-11-22 13:07:27,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:27,242 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-11-22 13:07:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:07:27,242 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:27,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:27,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:07:27,244 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:27,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:27,246 INFO L82 PathProgramCache]: Analyzing trace with hash 475878695, now seen corresponding path program 1 times [2020-11-22 13:07:27,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:27,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567860190] [2020-11-22 13:07:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:27,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567860190] [2020-11-22 13:07:27,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:27,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:07:27,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192069739] [2020-11-22 13:07:27,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:27,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:27,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:27,333 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2020-11-22 13:07:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:27,456 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2020-11-22 13:07:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:07:27,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 13:07:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:27,460 INFO L225 Difference]: With dead ends: 142 [2020-11-22 13:07:27,460 INFO L226 Difference]: Without dead ends: 92 [2020-11-22 13:07:27,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:27,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-22 13:07:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 51. [2020-11-22 13:07:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-22 13:07:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-11-22 13:07:27,476 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 9 [2020-11-22 13:07:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:27,477 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-11-22 13:07:27,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-11-22 13:07:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:07:27,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:27,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:27,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:07:27,479 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:27,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1867343728, now seen corresponding path program 1 times [2020-11-22 13:07:27,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:27,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895666277] [2020-11-22 13:07:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:27,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895666277] [2020-11-22 13:07:27,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:27,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:07:27,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714442506] [2020-11-22 13:07:27,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:27,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:27,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:27,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:27,542 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 4 states. [2020-11-22 13:07:27,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:27,644 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2020-11-22 13:07:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:27,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-22 13:07:27,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:27,646 INFO L225 Difference]: With dead ends: 91 [2020-11-22 13:07:27,646 INFO L226 Difference]: Without dead ends: 89 [2020-11-22 13:07:27,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-22 13:07:27,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 49. [2020-11-22 13:07:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-22 13:07:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-11-22 13:07:27,654 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 10 [2020-11-22 13:07:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:27,654 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-11-22 13:07:27,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-11-22 13:07:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:07:27,655 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:27,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:27,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:07:27,655 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:27,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1925839327, now seen corresponding path program 1 times [2020-11-22 13:07:27,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:27,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066516402] [2020-11-22 13:07:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:27,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066516402] [2020-11-22 13:07:27,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:27,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:07:27,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930590645] [2020-11-22 13:07:27,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:27,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:27,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:27,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:27,735 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 4 states. [2020-11-22 13:07:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:27,832 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-11-22 13:07:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:07:27,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 13:07:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:27,834 INFO L225 Difference]: With dead ends: 68 [2020-11-22 13:07:27,834 INFO L226 Difference]: Without dead ends: 66 [2020-11-22 13:07:27,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-22 13:07:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2020-11-22 13:07:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-22 13:07:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-11-22 13:07:27,841 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 11 [2020-11-22 13:07:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:27,845 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-11-22 13:07:27,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-11-22 13:07:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:07:27,846 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:27,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:27,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:07:27,846 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2053086800, now seen corresponding path program 1 times [2020-11-22 13:07:27,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:27,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423433041] [2020-11-22 13:07:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:27,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423433041] [2020-11-22 13:07:27,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:27,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:07:27,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998244992] [2020-11-22 13:07:27,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:07:27,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:27,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:07:27,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:27,930 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-11-22 13:07:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:28,043 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-11-22 13:07:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:07:28,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-22 13:07:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:28,044 INFO L225 Difference]: With dead ends: 86 [2020-11-22 13:07:28,045 INFO L226 Difference]: Without dead ends: 84 [2020-11-22 13:07:28,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:07:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-22 13:07:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2020-11-22 13:07:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-22 13:07:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-11-22 13:07:28,051 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 11 [2020-11-22 13:07:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:28,051 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-11-22 13:07:28,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:07:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-11-22 13:07:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:07:28,053 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:28,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:28,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:07:28,053 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash -428516897, now seen corresponding path program 1 times [2020-11-22 13:07:28,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:28,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340773791] [2020-11-22 13:07:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:28,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340773791] [2020-11-22 13:07:28,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:28,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:07:28,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389746452] [2020-11-22 13:07:28,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:07:28,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:28,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:07:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:28,097 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-11-22 13:07:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:28,244 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-11-22 13:07:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:07:28,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-22 13:07:28,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:28,246 INFO L225 Difference]: With dead ends: 74 [2020-11-22 13:07:28,246 INFO L226 Difference]: Without dead ends: 72 [2020-11-22 13:07:28,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:07:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-22 13:07:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2020-11-22 13:07:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-22 13:07:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-22 13:07:28,251 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 12 [2020-11-22 13:07:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:28,252 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-22 13:07:28,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:07:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-22 13:07:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:07:28,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:28,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:28,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:07:28,256 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:28,256 INFO L82 PathProgramCache]: Analyzing trace with hash -778812551, now seen corresponding path program 1 times [2020-11-22 13:07:28,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:28,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022025111] [2020-11-22 13:07:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:28,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022025111] [2020-11-22 13:07:28,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:28,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:07:28,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959521023] [2020-11-22 13:07:28,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:28,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:28,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:28,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:28,313 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2020-11-22 13:07:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:28,375 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-11-22 13:07:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:28,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 13:07:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:28,377 INFO L225 Difference]: With dead ends: 82 [2020-11-22 13:07:28,377 INFO L226 Difference]: Without dead ends: 80 [2020-11-22 13:07:28,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:28,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-22 13:07:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 41. [2020-11-22 13:07:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-22 13:07:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-22 13:07:28,383 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2020-11-22 13:07:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:28,383 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-22 13:07:28,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-22 13:07:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:07:28,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:28,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:28,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:07:28,384 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:28,385 INFO L82 PathProgramCache]: Analyzing trace with hash -399115800, now seen corresponding path program 1 times [2020-11-22 13:07:28,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:28,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860490793] [2020-11-22 13:07:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:28,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860490793] [2020-11-22 13:07:28,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:28,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:07:28,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40994384] [2020-11-22 13:07:28,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:07:28,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:28,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:07:28,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:28,454 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-11-22 13:07:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:28,549 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-11-22 13:07:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:07:28,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-22 13:07:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:28,550 INFO L225 Difference]: With dead ends: 56 [2020-11-22 13:07:28,550 INFO L226 Difference]: Without dead ends: 54 [2020-11-22 13:07:28,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:07:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-22 13:07:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-11-22 13:07:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-22 13:07:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-11-22 13:07:28,555 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2020-11-22 13:07:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:28,555 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-11-22 13:07:28,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:07:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-11-22 13:07:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:07:28,556 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:28,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:28,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:07:28,557 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:28,562 INFO L82 PathProgramCache]: Analyzing trace with hash 512318216, now seen corresponding path program 1 times [2020-11-22 13:07:28,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:28,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266980446] [2020-11-22 13:07:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:28,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266980446] [2020-11-22 13:07:28,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:28,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:07:28,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062126407] [2020-11-22 13:07:28,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:28,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:28,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:28,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:28,607 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 4 states. [2020-11-22 13:07:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:28,657 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-11-22 13:07:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:28,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-22 13:07:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:28,659 INFO L225 Difference]: With dead ends: 56 [2020-11-22 13:07:28,659 INFO L226 Difference]: Without dead ends: 54 [2020-11-22 13:07:28,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-22 13:07:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-22 13:07:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-22 13:07:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-11-22 13:07:28,664 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 14 [2020-11-22 13:07:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:28,664 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-11-22 13:07:28,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-11-22 13:07:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:07:28,665 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:28,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:28,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 13:07:28,665 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:28,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:28,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1297998351, now seen corresponding path program 1 times [2020-11-22 13:07:28,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:28,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280639895] [2020-11-22 13:07:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:28,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280639895] [2020-11-22 13:07:28,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:28,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:07:28,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720201542] [2020-11-22 13:07:28,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:28,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:28,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:28,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:28,720 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-11-22 13:07:28,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:28,814 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-11-22 13:07:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:07:28,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-22 13:07:28,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:28,815 INFO L225 Difference]: With dead ends: 64 [2020-11-22 13:07:28,815 INFO L226 Difference]: Without dead ends: 62 [2020-11-22 13:07:28,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-22 13:07:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2020-11-22 13:07:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:07:28,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-11-22 13:07:28,822 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 15 [2020-11-22 13:07:28,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:28,823 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-11-22 13:07:28,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:28,823 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-11-22 13:07:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:07:28,824 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:28,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:28,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 13:07:28,824 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1583237071, now seen corresponding path program 1 times [2020-11-22 13:07:28,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:28,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119146799] [2020-11-22 13:07:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:28,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119146799] [2020-11-22 13:07:28,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:28,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:07:28,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546289463] [2020-11-22 13:07:28,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:07:28,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:28,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:07:28,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:28,869 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 5 states. [2020-11-22 13:07:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:28,992 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2020-11-22 13:07:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:07:28,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-22 13:07:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:28,993 INFO L225 Difference]: With dead ends: 69 [2020-11-22 13:07:28,993 INFO L226 Difference]: Without dead ends: 67 [2020-11-22 13:07:28,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:07:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-22 13:07:28,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 33. [2020-11-22 13:07:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-22 13:07:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-11-22 13:07:28,998 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-11-22 13:07:28,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:28,999 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-11-22 13:07:28,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:07:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-11-22 13:07:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 13:07:29,000 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:29,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:29,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-22 13:07:29,000 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:29,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:29,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1835702790, now seen corresponding path program 1 times [2020-11-22 13:07:29,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:29,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154472642] [2020-11-22 13:07:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:29,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154472642] [2020-11-22 13:07:29,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:29,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:07:29,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662554607] [2020-11-22 13:07:29,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:07:29,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:29,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:07:29,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:07:29,055 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-11-22 13:07:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:29,206 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-11-22 13:07:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:07:29,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-22 13:07:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:29,207 INFO L225 Difference]: With dead ends: 57 [2020-11-22 13:07:29,207 INFO L226 Difference]: Without dead ends: 55 [2020-11-22 13:07:29,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:07:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-22 13:07:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2020-11-22 13:07:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:07:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-22 13:07:29,212 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2020-11-22 13:07:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:29,212 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-22 13:07:29,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:07:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-22 13:07:29,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:07:29,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:29,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:29,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-22 13:07:29,218 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:29,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1072205478, now seen corresponding path program 1 times [2020-11-22 13:07:29,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:29,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910565919] [2020-11-22 13:07:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:29,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910565919] [2020-11-22 13:07:29,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:29,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:07:29,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762780001] [2020-11-22 13:07:29,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:07:29,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:07:29,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:29,288 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2020-11-22 13:07:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:29,469 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-11-22 13:07:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:07:29,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-22 13:07:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:29,471 INFO L225 Difference]: With dead ends: 82 [2020-11-22 13:07:29,471 INFO L226 Difference]: Without dead ends: 80 [2020-11-22 13:07:29,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:07:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-22 13:07:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 29. [2020-11-22 13:07:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-22 13:07:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-11-22 13:07:29,475 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2020-11-22 13:07:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:29,475 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-11-22 13:07:29,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:07:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-11-22 13:07:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 13:07:29,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:29,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:29,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-22 13:07:29,477 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1121374723, now seen corresponding path program 1 times [2020-11-22 13:07:29,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:29,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479477833] [2020-11-22 13:07:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:29,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479477833] [2020-11-22 13:07:29,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:29,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:07:29,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549789729] [2020-11-22 13:07:29,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:07:29,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:29,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:07:29,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:07:29,538 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-11-22 13:07:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:29,700 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-11-22 13:07:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:07:29,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-22 13:07:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:29,702 INFO L225 Difference]: With dead ends: 55 [2020-11-22 13:07:29,702 INFO L226 Difference]: Without dead ends: 53 [2020-11-22 13:07:29,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:07:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-22 13:07:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 27. [2020-11-22 13:07:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-22 13:07:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-22 13:07:29,706 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-11-22 13:07:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:29,706 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-22 13:07:29,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:07:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-22 13:07:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-22 13:07:29,707 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:29,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:29,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-22 13:07:29,708 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:29,708 INFO L82 PathProgramCache]: Analyzing trace with hash 402884227, now seen corresponding path program 1 times [2020-11-22 13:07:29,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:29,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888855091] [2020-11-22 13:07:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:29,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888855091] [2020-11-22 13:07:29,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:29,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:07:29,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716164689] [2020-11-22 13:07:29,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:07:29,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:29,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:07:29,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:07:29,773 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-11-22 13:07:29,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:29,999 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2020-11-22 13:07:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:07:29,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-11-22 13:07:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:30,000 INFO L225 Difference]: With dead ends: 120 [2020-11-22 13:07:30,000 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:07:30,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:07:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:07:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:07:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:07:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:07:30,001 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-11-22 13:07:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:30,001 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:07:30,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:07:30,001 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:07:30,001 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:07:30,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-22 13:07:30,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:07:30,148 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 75 [2020-11-22 13:07:30,276 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 98 [2020-11-22 13:07:30,412 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 75 [2020-11-22 13:07:30,584 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 17 [2020-11-22 13:07:31,003 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 33 [2020-11-22 13:07:31,268 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 9 [2020-11-22 13:07:31,270 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,270 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,270 INFO L274 CegarLoopResult]: For program point L151(lines 151 281) no Hoare annotation was computed. [2020-11-22 13:07:31,270 INFO L274 CegarLoopResult]: For program point L110(lines 110 123) no Hoare annotation was computed. [2020-11-22 13:07:31,270 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,271 INFO L274 CegarLoopResult]: For program point L36(lines 36 300) no Hoare annotation was computed. [2020-11-22 13:07:31,271 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,271 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:07:31,271 INFO L274 CegarLoopResult]: For program point L86(lines 86 127) no Hoare annotation was computed. [2020-11-22 13:07:31,271 INFO L274 CegarLoopResult]: For program point L20(lines 20 312) no Hoare annotation was computed. [2020-11-22 13:07:31,271 INFO L274 CegarLoopResult]: For program point L243(lines 243 267) no Hoare annotation was computed. [2020-11-22 13:07:31,271 INFO L274 CegarLoopResult]: For program point L45(lines 45 288) no Hoare annotation was computed. [2020-11-22 13:07:31,271 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,272 INFO L270 CegarLoopResult]: At program point L293(lines 38 294) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~main__j~0) (<= (+ ULTIMATE.start_main_~main__j~0 5) ULTIMATE.start_main_~main__bufsize~0) (<= 0 ULTIMATE.start_main_~main__i~0) (< ULTIMATE.start_main_~main__i~0 ULTIMATE.start_main_~main__len~0) (<= (+ ULTIMATE.start_main_~main__limit~0 4) ULTIMATE.start_main_~main__bufsize~0)) [2020-11-22 13:07:31,272 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,272 INFO L274 CegarLoopResult]: For program point L227(lines 227 269) no Hoare annotation was computed. [2020-11-22 13:07:31,272 INFO L274 CegarLoopResult]: For program point L4-2(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,272 INFO L274 CegarLoopResult]: For program point L4-4(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,272 INFO L274 CegarLoopResult]: For program point L4-6(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,272 INFO L274 CegarLoopResult]: For program point L4-8(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,272 INFO L274 CegarLoopResult]: For program point L4-10(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,272 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,272 INFO L274 CegarLoopResult]: For program point L4-12(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,273 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,273 INFO L274 CegarLoopResult]: For program point L4-14(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,273 INFO L277 CegarLoopResult]: At program point L310(lines 13 313) the Hoare annotation is: true [2020-11-22 13:07:31,273 INFO L274 CegarLoopResult]: For program point L4-16(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,273 INFO L274 CegarLoopResult]: For program point L4-18(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,273 INFO L274 CegarLoopResult]: For program point L4-20(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,273 INFO L274 CegarLoopResult]: For program point L4-22(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,273 INFO L274 CegarLoopResult]: For program point L4-24(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,273 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,273 INFO L274 CegarLoopResult]: For program point L203(lines 203 273) no Hoare annotation was computed. [2020-11-22 13:07:31,273 INFO L274 CegarLoopResult]: For program point L4-26(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,274 INFO L274 CegarLoopResult]: For program point L4-28(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,274 INFO L274 CegarLoopResult]: For program point L38(lines 38 294) no Hoare annotation was computed. [2020-11-22 13:07:31,274 INFO L274 CegarLoopResult]: For program point L4-30(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,274 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,274 INFO L274 CegarLoopResult]: For program point L163(lines 163 279) no Hoare annotation was computed. [2020-11-22 13:07:31,274 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,274 INFO L270 CegarLoopResult]: At program point L304(lines 25 312) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~main__i~0) (<= (+ ULTIMATE.start_main_~main__limit~0 4) ULTIMATE.start_main_~main__bufsize~0)) [2020-11-22 13:07:31,274 INFO L274 CegarLoopResult]: For program point L139(lines 139 283) no Hoare annotation was computed. [2020-11-22 13:07:31,274 INFO L274 CegarLoopResult]: For program point L98(lines 98 125) no Hoare annotation was computed. [2020-11-22 13:07:31,274 INFO L274 CegarLoopResult]: For program point L255(lines 255 265) no Hoare annotation was computed. [2020-11-22 13:07:31,275 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,275 INFO L274 CegarLoopResult]: For program point L57(lines 57 286) no Hoare annotation was computed. [2020-11-22 13:07:31,275 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,275 INFO L274 CegarLoopResult]: For program point L74(lines 74 129) no Hoare annotation was computed. [2020-11-22 13:07:31,275 INFO L270 CegarLoopResult]: At program point L264(lines 31 306) the Hoare annotation is: (let ((.cse3 (<= (+ ULTIMATE.start_main_~main__j~0 4) ULTIMATE.start_main_~main__bufsize~0))) (let ((.cse1 (let ((.cse4 (<= 1 ULTIMATE.start_main_~main__i~0))) (or (and .cse3 .cse4) (and (not (= ULTIMATE.start_main_~__VERIFIER_assert__cond~12 0)) .cse4)))) (.cse2 (<= 1 ULTIMATE.start_main_~main__j~0)) (.cse0 (<= (+ ULTIMATE.start_main_~main__limit~0 4) ULTIMATE.start_main_~main__bufsize~0))) (or (and (= ULTIMATE.start_main_~main__j~0 0) (<= 0 ULTIMATE.start_main_~main__i~0) (< ULTIMATE.start_main_~main__i~0 ULTIMATE.start_main_~main__len~0) .cse0) (and .cse1 .cse2 (not (= ULTIMATE.start_main_~__VERIFIER_assert__cond~14 0)) .cse0) (and .cse3 .cse1 .cse2 .cse0)))) [2020-11-22 13:07:31,275 INFO L274 CegarLoopResult]: For program point L66(lines 66 285) no Hoare annotation was computed. [2020-11-22 13:07:31,275 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:07:31,275 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,275 INFO L274 CegarLoopResult]: For program point L215(lines 215 271) no Hoare annotation was computed. [2020-11-22 13:07:31,276 INFO L274 CegarLoopResult]: For program point L191(lines 191 275) no Hoare annotation was computed. [2020-11-22 13:07:31,276 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,276 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,276 INFO L274 CegarLoopResult]: For program point L175(lines 175 277) no Hoare annotation was computed. [2020-11-22 13:07:31,276 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-22 13:07:31,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:07:31 BoogieIcfgContainer [2020-11-22 13:07:31,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:07:31,312 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:07:31,312 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:07:31,312 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:07:31,313 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:26" (3/4) ... [2020-11-22 13:07:31,318 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:07:31,330 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-22 13:07:31,330 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 13:07:31,331 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:07:31,331 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:07:31,425 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_463af213-fa88-451c-aa53-1e1c051f55bb/bin/utaipan/witness.graphml [2020-11-22 13:07:31,425 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:07:31,427 INFO L168 Benchmark]: Toolchain (without parser) took 5997.83 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 91.2 MB in the beginning and 145.9 MB in the end (delta: -54.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:07:31,427 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 83.9 MB. Free memory was 41.8 MB in the beginning and 41.7 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:07:31,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.51 ms. Allocated memory is still 121.6 MB. Free memory was 91.2 MB in the beginning and 95.4 MB in the end (delta: -4.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,428 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.91 ms. Allocated memory is still 121.6 MB. Free memory was 95.4 MB in the beginning and 93.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,428 INFO L168 Benchmark]: Boogie Preprocessor took 26.29 ms. Allocated memory is still 121.6 MB. Free memory was 93.8 MB in the beginning and 92.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:07:31,429 INFO L168 Benchmark]: RCFGBuilder took 648.04 ms. Allocated memory is still 121.6 MB. Free memory was 92.3 MB in the beginning and 64.4 MB in the end (delta: 27.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,429 INFO L168 Benchmark]: TraceAbstraction took 4790.27 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 64.4 MB in the beginning and 151.2 MB in the end (delta: -86.8 MB). Peak memory consumption was 68.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,430 INFO L168 Benchmark]: Witness Printer took 113.40 ms. Allocated memory is still 176.2 MB. Free memory was 151.2 MB in the beginning and 145.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,432 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 83.9 MB. Free memory was 41.8 MB in the beginning and 41.7 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 368.51 ms. Allocated memory is still 121.6 MB. Free memory was 91.2 MB in the beginning and 95.4 MB in the end (delta: -4.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.91 ms. Allocated memory is still 121.6 MB. Free memory was 95.4 MB in the beginning and 93.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.29 ms. Allocated memory is still 121.6 MB. Free memory was 93.8 MB in the beginning and 92.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 648.04 ms. Allocated memory is still 121.6 MB. Free memory was 92.3 MB in the beginning and 64.4 MB in the end (delta: 27.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4790.27 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 64.4 MB in the beginning and 151.2 MB in the end (delta: -86.8 MB). Peak memory consumption was 68.4 MB. Max. memory is 16.1 GB. * Witness Printer took 113.40 ms. Allocated memory is still 176.2 MB. Free memory was 151.2 MB in the beginning and 145.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 16 specifications checked. All of them hold - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (((0 <= main__j && main__j + 5 <= main__bufsize) && 0 <= main__i) && main__i < main__len) && main__limit + 4 <= main__bufsize - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: ((((main__j == 0 && 0 <= main__i) && main__i < main__len) && main__limit + 4 <= main__bufsize) || (((((main__j + 4 <= main__bufsize && 1 <= main__i) || (!(__VERIFIER_assert__cond == 0) && 1 <= main__i)) && 1 <= main__j) && !(__VERIFIER_assert__cond == 0)) && main__limit + 4 <= main__bufsize)) || (((main__j + 4 <= main__bufsize && ((main__j + 4 <= main__bufsize && 1 <= main__i) || (!(__VERIFIER_assert__cond == 0) && 1 <= main__i))) && 1 <= main__j) && main__limit + 4 <= main__bufsize) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 0 <= main__i && main__limit + 4 <= main__bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 58 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 865 SDtfs, 1260 SDslu, 673 SDs, 0 SdLazy, 912 SolverSat, 105 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 436 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 25 NumberOfFragments, 109 HoareAnnotationTreeSize, 4 FomulaSimplifications, 233044656 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 4 FomulaSimplificationsInter, 253791 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 214 NumberOfCodeBlocks, 214 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 8604 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...