./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label28.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_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label28.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/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 dafba940bcb700dc5bab41ac332b469176c57bc7 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:43:21,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:43:21,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:43:21,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:43:21,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:43:21,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:43:21,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:43:21,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:43:21,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:43:21,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:43:21,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:43:21,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:43:21,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:43:21,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:43:21,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:43:21,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:43:21,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:43:21,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:43:21,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:43:21,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:43:21,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:43:21,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:43:21,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:43:21,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:43:21,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:43:21,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:43:21,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:43:21,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:43:21,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:43:21,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:43:21,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:43:21,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:43:21,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:43:21,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:43:21,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:43:21,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:43:21,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:43:21,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:43:21,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:43:21,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:43:21,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:43:21,223 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:43:21,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:43:21,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:43:21,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:43:21,247 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:43:21,248 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:43:21,248 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:43:21,248 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:43:21,248 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:43:21,248 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:43:21,248 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:43:21,249 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:43:21,249 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:43:21,249 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:43:21,254 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:43:21,254 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:43:21,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:43:21,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:43:21,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:43:21,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:43:21,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:43:21,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:43:21,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:43:21,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:43:21,257 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:43:21,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:43:21,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:43:21,258 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:43:21,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:43:21,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:43:21,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:43:21,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:43:21,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:43:21,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:43:21,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:43:21,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:43:21,263 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:43:21,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:43:21,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:43:21,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:43:21,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:43:21,264 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_e75994ca-5418-4d64-bf8b-82d4003daf32/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dafba940bcb700dc5bab41ac332b469176c57bc7 [2020-11-28 07:43:21,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:43:21,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:43:21,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:43:21,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:43:21,605 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:43:21,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label28.c [2020-11-28 07:43:21,677 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/data/8b1bc35fd/d6138785b36f49e69c332d707eaf6437/FLAG9a7024faf [2020-11-28 07:43:22,335 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:43:22,335 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/sv-benchmarks/c/eca-rers2012/Problem01_label28.c [2020-11-28 07:43:22,353 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/data/8b1bc35fd/d6138785b36f49e69c332d707eaf6437/FLAG9a7024faf [2020-11-28 07:43:22,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/data/8b1bc35fd/d6138785b36f49e69c332d707eaf6437 [2020-11-28 07:43:22,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:43:22,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:43:22,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:43:22,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:43:22,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:43:22,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4667b936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:22, skipping insertion in model container [2020-11-28 07:43:22,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:43:22" (1/1) ... [2020-11-28 07:43:22,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:43:22,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:43:23,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:43:23,017 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:43:23,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:43:23,261 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:43:23,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23 WrapperNode [2020-11-28 07:43:23,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:43:23,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:43:23,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:43:23,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:43:23,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (1/1) ... [2020-11-28 07:43:23,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (1/1) ... [2020-11-28 07:43:23,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:43:23,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:43:23,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:43:23,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:43:23,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (1/1) ... [2020-11-28 07:43:23,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (1/1) ... [2020-11-28 07:43:23,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (1/1) ... [2020-11-28 07:43:23,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (1/1) ... [2020-11-28 07:43:23,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (1/1) ... [2020-11-28 07:43:23,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (1/1) ... [2020-11-28 07:43:23,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (1/1) ... [2020-11-28 07:43:23,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:43:23,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:43:23,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:43:23,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:43:23,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:43:23,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:43:23,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:43:23,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:43:23,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:43:26,020 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:43:26,021 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:43:26,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:26 BoogieIcfgContainer [2020-11-28 07:43:26,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:43:26,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:43:26,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:43:26,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:43:26,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:43:22" (1/3) ... [2020-11-28 07:43:26,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182ed564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:26, skipping insertion in model container [2020-11-28 07:43:26,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:23" (2/3) ... [2020-11-28 07:43:26,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182ed564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:26, skipping insertion in model container [2020-11-28 07:43:26,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:26" (3/3) ... [2020-11-28 07:43:26,033 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label28.c [2020-11-28 07:43:26,044 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:43:26,048 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:43:26,060 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:43:26,093 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:43:26,094 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:43:26,094 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:43:26,094 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:43:26,094 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:43:26,094 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:43:26,094 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:43:26,094 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:43:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:43:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:43:26,123 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:26,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:26,125 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:26,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1520705645, now seen corresponding path program 1 times [2020-11-28 07:43:26,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:26,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095510116] [2020-11-28 07:43:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:26,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095510116] [2020-11-28 07:43:26,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:26,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:26,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103351534] [2020-11-28 07:43:26,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:26,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:26,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:26,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:26,613 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:43:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:27,174 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:43:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:27,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:43:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:27,199 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:43:27,199 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:43:27,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:43:27,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:43:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:43:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-28 07:43:27,281 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-28 07:43:27,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:27,282 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-28 07:43:27,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-28 07:43:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-28 07:43:27,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:27,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:27,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:43:27,286 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:27,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:27,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1350090303, now seen corresponding path program 1 times [2020-11-28 07:43:27,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:27,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883315065] [2020-11-28 07:43:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:27,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883315065] [2020-11-28 07:43:27,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:27,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:27,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627553015] [2020-11-28 07:43:27,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:27,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:27,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:27,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:27,400 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-28 07:43:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:27,856 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-28 07:43:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:27,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-11-28 07:43:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:27,859 INFO L225 Difference]: With dead ends: 431 [2020-11-28 07:43:27,860 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:43:27,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:27,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:43:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-28 07:43:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:43:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 480 transitions. [2020-11-28 07:43:27,886 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 480 transitions. Word has length 76 [2020-11-28 07:43:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:27,887 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 480 transitions. [2020-11-28 07:43:27,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 480 transitions. [2020-11-28 07:43:27,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-28 07:43:27,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:27,892 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:27,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:43:27,892 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1761110345, now seen corresponding path program 1 times [2020-11-28 07:43:27,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:27,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503426219] [2020-11-28 07:43:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:27,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503426219] [2020-11-28 07:43:27,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:27,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:27,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208419515] [2020-11-28 07:43:27,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:27,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:27,947 INFO L87 Difference]: Start difference. First operand 287 states and 480 transitions. Second operand 3 states. [2020-11-28 07:43:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:28,367 INFO L93 Difference]: Finished difference Result 786 states and 1299 transitions. [2020-11-28 07:43:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:28,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-11-28 07:43:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:28,373 INFO L225 Difference]: With dead ends: 786 [2020-11-28 07:43:28,373 INFO L226 Difference]: Without dead ends: 500 [2020-11-28 07:43:28,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-11-28 07:43:28,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2020-11-28 07:43:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-11-28 07:43:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 748 transitions. [2020-11-28 07:43:28,428 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 748 transitions. Word has length 80 [2020-11-28 07:43:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:28,430 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 748 transitions. [2020-11-28 07:43:28,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 748 transitions. [2020-11-28 07:43:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-28 07:43:28,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:28,440 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:28,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:43:28,441 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:28,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1450818371, now seen corresponding path program 1 times [2020-11-28 07:43:28,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:28,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187232430] [2020-11-28 07:43:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:28,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187232430] [2020-11-28 07:43:28,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:28,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:43:28,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130798148] [2020-11-28 07:43:28,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:28,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:28,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:28,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:28,521 INFO L87 Difference]: Start difference. First operand 500 states and 748 transitions. Second operand 3 states. [2020-11-28 07:43:28,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:28,958 INFO L93 Difference]: Finished difference Result 1354 states and 2015 transitions. [2020-11-28 07:43:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:28,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-11-28 07:43:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:28,963 INFO L225 Difference]: With dead ends: 1354 [2020-11-28 07:43:28,964 INFO L226 Difference]: Without dead ends: 855 [2020-11-28 07:43:28,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-11-28 07:43:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 784. [2020-11-28 07:43:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-28 07:43:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1158 transitions. [2020-11-28 07:43:28,994 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1158 transitions. Word has length 84 [2020-11-28 07:43:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:28,994 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1158 transitions. [2020-11-28 07:43:28,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1158 transitions. [2020-11-28 07:43:28,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:43:28,998 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:28,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:28,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:43:28,999 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash 228738088, now seen corresponding path program 1 times [2020-11-28 07:43:29,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:29,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142447531] [2020-11-28 07:43:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:29,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142447531] [2020-11-28 07:43:29,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:29,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:29,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707073417] [2020-11-28 07:43:29,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:29,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:29,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:29,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:29,090 INFO L87 Difference]: Start difference. First operand 784 states and 1158 transitions. Second operand 3 states. [2020-11-28 07:43:29,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:29,456 INFO L93 Difference]: Finished difference Result 1567 states and 2315 transitions. [2020-11-28 07:43:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:29,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-11-28 07:43:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:29,467 INFO L225 Difference]: With dead ends: 1567 [2020-11-28 07:43:29,467 INFO L226 Difference]: Without dead ends: 784 [2020-11-28 07:43:29,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-11-28 07:43:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2020-11-28 07:43:29,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-28 07:43:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1140 transitions. [2020-11-28 07:43:29,504 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1140 transitions. Word has length 86 [2020-11-28 07:43:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:29,505 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1140 transitions. [2020-11-28 07:43:29,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:29,505 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1140 transitions. [2020-11-28 07:43:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-28 07:43:29,507 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:29,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:29,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:43:29,507 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:29,508 INFO L82 PathProgramCache]: Analyzing trace with hash -222282212, now seen corresponding path program 1 times [2020-11-28 07:43:29,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:29,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916203612] [2020-11-28 07:43:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 07:43:29,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916203612] [2020-11-28 07:43:29,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:29,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:29,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484417758] [2020-11-28 07:43:29,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:29,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:29,575 INFO L87 Difference]: Start difference. First operand 784 states and 1140 transitions. Second operand 3 states. [2020-11-28 07:43:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:29,922 INFO L93 Difference]: Finished difference Result 1567 states and 2279 transitions. [2020-11-28 07:43:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:29,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-11-28 07:43:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:29,928 INFO L225 Difference]: With dead ends: 1567 [2020-11-28 07:43:29,928 INFO L226 Difference]: Without dead ends: 784 [2020-11-28 07:43:29,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-11-28 07:43:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2020-11-28 07:43:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-28 07:43:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1122 transitions. [2020-11-28 07:43:29,988 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1122 transitions. Word has length 87 [2020-11-28 07:43:29,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:29,989 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1122 transitions. [2020-11-28 07:43:29,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1122 transitions. [2020-11-28 07:43:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-28 07:43:29,995 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:29,995 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:29,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:43:29,996 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:29,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2092182098, now seen corresponding path program 1 times [2020-11-28 07:43:29,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:29,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366761832] [2020-11-28 07:43:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:30,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366761832] [2020-11-28 07:43:30,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:30,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:43:30,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525399954] [2020-11-28 07:43:30,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:43:30,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:30,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:43:30,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:43:30,091 INFO L87 Difference]: Start difference. First operand 784 states and 1122 transitions. Second operand 4 states. [2020-11-28 07:43:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:30,662 INFO L93 Difference]: Finished difference Result 1780 states and 2510 transitions. [2020-11-28 07:43:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:43:30,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-11-28 07:43:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:30,669 INFO L225 Difference]: With dead ends: 1780 [2020-11-28 07:43:30,669 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:43:30,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:43:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:43:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2020-11-28 07:43:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:43:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1282 transitions. [2020-11-28 07:43:30,721 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1282 transitions. Word has length 90 [2020-11-28 07:43:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:30,721 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1282 transitions. [2020-11-28 07:43:30,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:43:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1282 transitions. [2020-11-28 07:43:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-11-28 07:43:30,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:30,724 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:30,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:43:30,724 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1737643663, now seen corresponding path program 1 times [2020-11-28 07:43:30,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:30,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993053225] [2020-11-28 07:43:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:30,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993053225] [2020-11-28 07:43:30,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:30,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:43:30,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237173037] [2020-11-28 07:43:30,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:30,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:30,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:30,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:30,880 INFO L87 Difference]: Start difference. First operand 926 states and 1282 transitions. Second operand 3 states. [2020-11-28 07:43:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:31,208 INFO L93 Difference]: Finished difference Result 1141 states and 1562 transitions. [2020-11-28 07:43:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:31,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-11-28 07:43:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:31,215 INFO L225 Difference]: With dead ends: 1141 [2020-11-28 07:43:31,215 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:43:31,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:43:31,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 855. [2020-11-28 07:43:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-11-28 07:43:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1191 transitions. [2020-11-28 07:43:31,266 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1191 transitions. Word has length 108 [2020-11-28 07:43:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:31,267 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1191 transitions. [2020-11-28 07:43:31,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:31,267 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1191 transitions. [2020-11-28 07:43:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-11-28 07:43:31,270 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:31,270 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:43:31,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:43:31,271 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:31,271 INFO L82 PathProgramCache]: Analyzing trace with hash 566170102, now seen corresponding path program 1 times [2020-11-28 07:43:31,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:31,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275903399] [2020-11-28 07:43:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 138 proven. 11 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-11-28 07:43:31,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275903399] [2020-11-28 07:43:31,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766218321] [2020-11-28 07:43:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:43:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:31,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:43:31,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:43:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-28 07:43:31,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:43:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-28 07:43:31,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:43:31,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-28 07:43:31,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364302774] [2020-11-28 07:43:31,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:31,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:31,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:31,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:43:31,769 INFO L87 Difference]: Start difference. First operand 855 states and 1191 transitions. Second operand 3 states. [2020-11-28 07:43:32,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:32,197 INFO L93 Difference]: Finished difference Result 1707 states and 2380 transitions. [2020-11-28 07:43:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:32,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2020-11-28 07:43:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:32,199 INFO L225 Difference]: With dead ends: 1707 [2020-11-28 07:43:32,199 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:43:32,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 350 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:43:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:43:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:43:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:43:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:43:32,202 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 176 [2020-11-28 07:43:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:32,202 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:43:32,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:43:32,202 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:43:32,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-28 07:43:32,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:43:32,583 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-11-28 07:43:32,621 INFO L274 CegarLoopResult]: For program point L465(line 465) no Hoare annotation was computed. [2020-11-28 07:43:32,621 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:43:32,621 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:43:32,621 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:43:32,621 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:43:32,622 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:43:32,623 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:43:32,624 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:43:32,625 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (<= ~a16~0 5)) (.cse3 (= ~a21~0 1)) (.cse2 (= ~a17~0 1)) (.cse1 (<= ~a21~0 0)) (.cse4 (= ~a20~0 1))) (or (and .cse0 .cse1 .cse2) (and .cse3 (not (= ~a7~0 1))) (and .cse3 .cse0) (and .cse3 .cse4 .cse2) (and .cse1 .cse4))) [2020-11-28 07:43:32,625 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:43:32,625 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:43:32,625 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:43:32,625 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:43:32,625 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:43:32,625 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:43:32,625 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:43:32,634 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:43:32,634 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:43:32,635 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:43:32,635 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:43:32,635 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:43:32,635 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:43:32,635 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:43:32,635 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:43:32,635 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:43:32,636 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:43:32,636 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:43:32,636 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:43:32,636 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:43:32,636 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:43:32,636 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:43:32,636 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:43:32,645 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (<= ~a16~0 5)) (.cse3 (= ~a21~0 1)) (.cse2 (= ~a17~0 1)) (.cse1 (<= ~a21~0 0)) (.cse4 (= ~a20~0 1))) (or (and .cse0 .cse1 .cse2) (and .cse3 (not (= ~a7~0 1))) (and .cse3 .cse0) (and .cse3 .cse4 .cse2) (and .cse1 .cse4))) [2020-11-28 07:43:32,646 INFO L274 CegarLoopResult]: For program point L461-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:43:32,646 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:43:32,646 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:43:32,646 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:43:32,646 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:43:32,647 INFO L274 CegarLoopResult]: For program point L464-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:43:32,647 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:43:32,647 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:43:32,647 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:43:32,647 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:43:32,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:43:32 BoogieIcfgContainer [2020-11-28 07:43:32,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:43:32,680 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:43:32,680 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:43:32,680 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:43:32,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:26" (3/4) ... [2020-11-28 07:43:32,684 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:43:32,708 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-28 07:43:32,710 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:43:32,711 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:43:32,713 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:43:32,866 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e75994ca-5418-4d64-bf8b-82d4003daf32/bin/utaipan/witness.graphml [2020-11-28 07:43:32,867 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:43:32,868 INFO L168 Benchmark]: Toolchain (without parser) took 10304.10 ms. Allocated memory was 104.9 MB in the beginning and 220.2 MB in the end (delta: 115.3 MB). Free memory was 68.0 MB in the beginning and 158.4 MB in the end (delta: -90.4 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:32,868 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 104.9 MB. Free memory is still 86.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:43:32,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 700.28 ms. Allocated memory is still 104.9 MB. Free memory was 67.9 MB in the beginning and 64.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:32,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.42 ms. Allocated memory is still 104.9 MB. Free memory was 64.6 MB in the beginning and 58.8 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:32,869 INFO L168 Benchmark]: Boogie Preprocessor took 61.43 ms. Allocated memory is still 104.9 MB. Free memory was 58.8 MB in the beginning and 54.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:32,869 INFO L168 Benchmark]: RCFGBuilder took 2587.06 ms. Allocated memory was 104.9 MB in the beginning and 138.4 MB in the end (delta: 33.6 MB). Free memory was 54.1 MB in the beginning and 63.5 MB in the end (delta: -9.3 MB). Peak memory consumption was 43.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:32,870 INFO L168 Benchmark]: TraceAbstraction took 6655.06 ms. Allocated memory was 138.4 MB in the beginning and 220.2 MB in the end (delta: 81.8 MB). Free memory was 63.4 MB in the beginning and 173.2 MB in the end (delta: -109.8 MB). Peak memory consumption was 84.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:32,870 INFO L168 Benchmark]: Witness Printer took 186.70 ms. Allocated memory is still 220.2 MB. Free memory was 173.2 MB in the beginning and 158.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:43:32,872 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 104.9 MB. Free memory is still 86.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 700.28 ms. Allocated memory is still 104.9 MB. Free memory was 67.9 MB in the beginning and 64.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.42 ms. Allocated memory is still 104.9 MB. Free memory was 64.6 MB in the beginning and 58.8 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.43 ms. Allocated memory is still 104.9 MB. Free memory was 58.8 MB in the beginning and 54.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2587.06 ms. Allocated memory was 104.9 MB in the beginning and 138.4 MB in the end (delta: 33.6 MB). Free memory was 54.1 MB in the beginning and 63.5 MB in the end (delta: -9.3 MB). Peak memory consumption was 43.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6655.06 ms. Allocated memory was 138.4 MB in the beginning and 220.2 MB in the end (delta: 81.8 MB). Free memory was 63.4 MB in the beginning and 173.2 MB in the end (delta: -109.8 MB). Peak memory consumption was 84.2 MB. Max. memory is 16.1 GB. * Witness Printer took 186.70 ms. Allocated memory is still 220.2 MB. Free memory was 173.2 MB in the beginning and 158.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((a16 <= 5 && a21 <= 0) && a17 == 1) || (a21 == 1 && !(a7 == 1))) || (a21 == 1 && a16 <= 5)) || ((a21 == 1 && a20 == 1) && a17 == 1)) || (a21 <= 0 && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((a16 <= 5 && a21 <= 0) && a17 == 1) || (a21 == 1 && !(a7 == 1))) || (a21 == 1 && a16 <= 5)) || ((a21 == 1 && a20 == 1) && a17 == 1)) || (a21 <= 0 && a20 == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.3s, OverallIterations: 9, TraceHistogramMax: 6, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 414 SDtfs, 650 SDslu, 37 SDs, 0 SdLazy, 1988 SolverSat, 525 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 373 GetRequests, 360 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=926occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 426 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 29 NumberOfFragments, 87 HoareAnnotationTreeSize, 3 FomulaSimplifications, 536 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 1034 NumberOfCodeBlocks, 1034 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1199 ConstructedInterpolants, 0 QuantifiedInterpolants, 347428 SizeOfPredicates, 1 NumberOfNonLiveVariables, 427 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 11 InterpolantComputations, 10 PerfectInterpolantSequences, 742/753 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...