./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label36.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_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label36.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/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 3efef18ca2c5424ea24622c4ce9c5dae3a170caf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 07:41:34,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:34,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:34,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:34,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:34,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:34,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:34,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:34,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:34,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:34,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:34,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:34,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:34,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:34,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:34,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:34,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:34,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:34,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:34,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:34,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:34,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:34,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:34,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:34,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:34,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:34,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:34,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:34,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:34,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:34,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:34,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:34,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:34,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:34,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:34,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:34,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:34,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:34,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:34,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:34,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:34,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:41:34,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:34,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:34,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:34,206 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:34,207 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:34,207 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:34,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:41:34,207 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:34,208 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:34,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:41:34,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:41:34,208 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:34,209 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:41:34,209 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:41:34,209 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:41:34,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:34,210 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:41:34,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:41:34,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:41:34,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:34,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:41:34,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:34,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:41:34,215 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:41:34,215 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:41:34,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:41:34,215 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:34,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:41:34,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:34,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:34,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:34,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:34,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:34,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:34,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:41:34,219 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:41:34,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:41:34,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:41:34,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:34,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:34,221 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_3e7bef93-dedf-4a4e-ba55-227f99c9a390/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3efef18ca2c5424ea24622c4ce9c5dae3a170caf [2020-11-28 07:41:34,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:34,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:34,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:34,580 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:34,584 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:34,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label36.c [2020-11-28 07:41:34,672 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/data/8fe5d8c81/ff79d7c30a074995951d36398f1aa7c5/FLAGd24512d38 [2020-11-28 07:41:35,279 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:35,288 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/sv-benchmarks/c/eca-rers2012/Problem01_label36.c [2020-11-28 07:41:35,304 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/data/8fe5d8c81/ff79d7c30a074995951d36398f1aa7c5/FLAGd24512d38 [2020-11-28 07:41:35,536 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/data/8fe5d8c81/ff79d7c30a074995951d36398f1aa7c5 [2020-11-28 07:41:35,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:35,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:35,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:35,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:35,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:35,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:35" (1/1) ... [2020-11-28 07:41:35,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2fbca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:35, skipping insertion in model container [2020-11-28 07:41:35,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:35" (1/1) ... [2020-11-28 07:41:35,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:35,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:36,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:36,070 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:36,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:36,203 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:36,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36 WrapperNode [2020-11-28 07:41:36,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:36,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:36,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:36,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:36,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (1/1) ... [2020-11-28 07:41:36,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (1/1) ... [2020-11-28 07:41:36,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:36,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:36,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:36,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:36,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (1/1) ... [2020-11-28 07:41:36,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (1/1) ... [2020-11-28 07:41:36,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (1/1) ... [2020-11-28 07:41:36,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (1/1) ... [2020-11-28 07:41:36,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (1/1) ... [2020-11-28 07:41:36,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (1/1) ... [2020-11-28 07:41:36,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (1/1) ... [2020-11-28 07:41:36,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:36,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:36,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:36,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:36,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/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 07:41:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:41:36,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:41:36,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:36,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:38,497 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:38,498 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:41:38,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:38 BoogieIcfgContainer [2020-11-28 07:41:38,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:38,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:38,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:38,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:38,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:35" (1/3) ... [2020-11-28 07:41:38,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae54bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:38, skipping insertion in model container [2020-11-28 07:41:38,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:36" (2/3) ... [2020-11-28 07:41:38,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae54bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:38, skipping insertion in model container [2020-11-28 07:41:38,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:38" (3/3) ... [2020-11-28 07:41:38,509 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label36.c [2020-11-28 07:41:38,520 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:38,525 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:41:38,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:41:38,566 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:38,566 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:41:38,566 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:38,566 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:38,567 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:38,567 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:38,567 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:38,567 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:41:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:41:38,592 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:38,593 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 07:41:38,593 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:38,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1520707949, now seen corresponding path program 1 times [2020-11-28 07:41:38,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:38,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023427570] [2020-11-28 07:41:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:39,089 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 07:41:39,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023427570] [2020-11-28 07:41:39,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:39,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:39,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768489795] [2020-11-28 07:41:39,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:39,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:39,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:39,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:39,117 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:41:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:39,630 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:41:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:39,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:41:39,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:39,652 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:41:39,652 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:41:39,657 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 07:41:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:41:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:41:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:41:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-28 07:41:39,729 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-28 07:41:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:39,730 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-28 07:41:39,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-28 07:41:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-28 07:41:39,732 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:39,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:39,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:41:39,733 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:39,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:39,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1975138238, now seen corresponding path program 1 times [2020-11-28 07:41:39,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:39,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567056944] [2020-11-28 07:41:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:39,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567056944] [2020-11-28 07:41:39,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:39,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:39,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390450777] [2020-11-28 07:41:39,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:39,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:39,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:39,824 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-28 07:41:40,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:40,269 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-28 07:41:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:40,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-28 07:41:40,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:40,273 INFO L225 Difference]: With dead ends: 431 [2020-11-28 07:41:40,273 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:41:40,274 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 07:41:40,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:41:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-28 07:41:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:41:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-11-28 07:41:40,316 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-11-28 07:41:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:40,317 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-11-28 07:41:40,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-11-28 07:41:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-28 07:41:40,327 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:40,328 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:40,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:41:40,328 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:40,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1832090820, now seen corresponding path program 1 times [2020-11-28 07:41:40,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:40,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167497178] [2020-11-28 07:41:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:40,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167497178] [2020-11-28 07:41:40,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:40,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:40,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843428930] [2020-11-28 07:41:40,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:40,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:40,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:40,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:40,602 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 4 states. [2020-11-28 07:41:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:41,403 INFO L93 Difference]: Finished difference Result 784 states and 1255 transitions. [2020-11-28 07:41:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:41,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-28 07:41:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:41,408 INFO L225 Difference]: With dead ends: 784 [2020-11-28 07:41:41,408 INFO L226 Difference]: Without dead ends: 429 [2020-11-28 07:41:41,410 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 07:41:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-28 07:41:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2020-11-28 07:41:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-11-28 07:41:41,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 557 transitions. [2020-11-28 07:41:41,433 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 557 transitions. Word has length 78 [2020-11-28 07:41:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:41,433 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 557 transitions. [2020-11-28 07:41:41,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:41,434 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 557 transitions. [2020-11-28 07:41:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-28 07:41:41,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:41,435 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:41,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:41:41,436 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:41,436 INFO L82 PathProgramCache]: Analyzing trace with hash 102967575, now seen corresponding path program 1 times [2020-11-28 07:41:41,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:41,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524856] [2020-11-28 07:41:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:41,530 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 07:41:41,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524856] [2020-11-28 07:41:41,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:41,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:41,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284283695] [2020-11-28 07:41:41,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:41,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:41,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:41,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:41,535 INFO L87 Difference]: Start difference. First operand 429 states and 557 transitions. Second operand 4 states. [2020-11-28 07:41:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:42,088 INFO L93 Difference]: Finished difference Result 999 states and 1360 transitions. [2020-11-28 07:41:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:42,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-11-28 07:41:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:42,092 INFO L225 Difference]: With dead ends: 999 [2020-11-28 07:41:42,092 INFO L226 Difference]: Without dead ends: 642 [2020-11-28 07:41:42,093 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 07:41:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-11-28 07:41:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2020-11-28 07:41:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-11-28 07:41:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 851 transitions. [2020-11-28 07:41:42,122 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 851 transitions. Word has length 83 [2020-11-28 07:41:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:42,122 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 851 transitions. [2020-11-28 07:41:42,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 851 transitions. [2020-11-28 07:41:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-28 07:41:42,125 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:42,125 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:42,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:41:42,125 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:42,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1752400941, now seen corresponding path program 1 times [2020-11-28 07:41:42,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:42,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100077787] [2020-11-28 07:41:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-28 07:41:42,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100077787] [2020-11-28 07:41:42,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:42,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:42,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202526825] [2020-11-28 07:41:42,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:42,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:42,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:42,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:42,221 INFO L87 Difference]: Start difference. First operand 642 states and 851 transitions. Second operand 3 states. [2020-11-28 07:41:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:42,684 INFO L93 Difference]: Finished difference Result 1567 states and 2073 transitions. [2020-11-28 07:41:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:42,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-11-28 07:41:42,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:42,701 INFO L225 Difference]: With dead ends: 1567 [2020-11-28 07:41:42,702 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:41:42,703 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 07:41:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:41:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2020-11-28 07:41:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-28 07:41:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1029 transitions. [2020-11-28 07:41:42,747 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1029 transitions. Word has length 92 [2020-11-28 07:41:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:42,747 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1029 transitions. [2020-11-28 07:41:42,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:42,747 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1029 transitions. [2020-11-28 07:41:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-28 07:41:42,749 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:42,749 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2020-11-28 07:41:42,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:41:42,750 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:42,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:42,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1072327650, now seen corresponding path program 1 times [2020-11-28 07:41:42,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:42,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385976834] [2020-11-28 07:41:42,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:42,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385976834] [2020-11-28 07:41:42,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:42,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:41:42,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354630443] [2020-11-28 07:41:42,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:42,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:42,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:42,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:42,844 INFO L87 Difference]: Start difference. First operand 784 states and 1029 transitions. Second operand 4 states. [2020-11-28 07:41:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:43,460 INFO L93 Difference]: Finished difference Result 1709 states and 2302 transitions. [2020-11-28 07:41:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:43,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-11-28 07:41:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:43,471 INFO L225 Difference]: With dead ends: 1709 [2020-11-28 07:41:43,471 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:41:43,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:41:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2020-11-28 07:41:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:41:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1202 transitions. [2020-11-28 07:41:43,502 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1202 transitions. Word has length 98 [2020-11-28 07:41:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:43,502 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1202 transitions. [2020-11-28 07:41:43,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1202 transitions. [2020-11-28 07:41:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-28 07:41:43,513 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:43,513 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:43,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:41:43,514 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:43,514 INFO L82 PathProgramCache]: Analyzing trace with hash 414560251, now seen corresponding path program 1 times [2020-11-28 07:41:43,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:43,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652128296] [2020-11-28 07:41:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-28 07:41:43,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652128296] [2020-11-28 07:41:43,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:43,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:43,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710358142] [2020-11-28 07:41:43,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:43,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:43,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:43,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:43,635 INFO L87 Difference]: Start difference. First operand 926 states and 1202 transitions. Second operand 4 states. [2020-11-28 07:41:44,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:44,286 INFO L93 Difference]: Finished difference Result 1993 states and 2589 transitions. [2020-11-28 07:41:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:44,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-11-28 07:41:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:44,293 INFO L225 Difference]: With dead ends: 1993 [2020-11-28 07:41:44,293 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:41:44,295 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 07:41:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:41:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2020-11-28 07:41:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:41:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1363 transitions. [2020-11-28 07:41:44,323 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1363 transitions. Word has length 112 [2020-11-28 07:41:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:44,323 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1363 transitions. [2020-11-28 07:41:44,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1363 transitions. [2020-11-28 07:41:44,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-28 07:41:44,326 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:44,326 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 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] [2020-11-28 07:41:44,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:41:44,327 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:44,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1154617736, now seen corresponding path program 1 times [2020-11-28 07:41:44,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:44,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66252100] [2020-11-28 07:41:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:44,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66252100] [2020-11-28 07:41:44,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:44,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:41:44,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085018934] [2020-11-28 07:41:44,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:44,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:44,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:44,439 INFO L87 Difference]: Start difference. First operand 1068 states and 1363 transitions. Second operand 4 states. [2020-11-28 07:41:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:45,001 INFO L93 Difference]: Finished difference Result 2277 states and 2909 transitions. [2020-11-28 07:41:45,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:45,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-11-28 07:41:45,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:45,009 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:41:45,009 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:41:45,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:41:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 997. [2020-11-28 07:41:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:41:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1203 transitions. [2020-11-28 07:41:45,037 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1203 transitions. Word has length 129 [2020-11-28 07:41:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:45,037 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1203 transitions. [2020-11-28 07:41:45,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1203 transitions. [2020-11-28 07:41:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-11-28 07:41:45,040 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:45,040 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 07:41:45,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:41:45,041 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:45,041 INFO L82 PathProgramCache]: Analyzing trace with hash -879968992, now seen corresponding path program 1 times [2020-11-28 07:41:45,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:45,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994375895] [2020-11-28 07:41:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-28 07:41:45,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994375895] [2020-11-28 07:41:45,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:45,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:45,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341595895] [2020-11-28 07:41:45,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:45,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:45,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:45,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:45,194 INFO L87 Difference]: Start difference. First operand 997 states and 1203 transitions. Second operand 3 states. [2020-11-28 07:41:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:45,605 INFO L93 Difference]: Finished difference Result 2135 states and 2589 transitions. [2020-11-28 07:41:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:45,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-11-28 07:41:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:45,612 INFO L225 Difference]: With dead ends: 2135 [2020-11-28 07:41:45,612 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:41:45,614 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 07:41:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:41:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2020-11-28 07:41:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:41:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1359 transitions. [2020-11-28 07:41:45,645 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1359 transitions. Word has length 172 [2020-11-28 07:41:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:45,646 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1359 transitions. [2020-11-28 07:41:45,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1359 transitions. [2020-11-28 07:41:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-28 07:41:45,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:45,651 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:45,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:41:45,651 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:45,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1976361367, now seen corresponding path program 1 times [2020-11-28 07:41:45,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:45,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706682325] [2020-11-28 07:41:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 121 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-28 07:41:46,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706682325] [2020-11-28 07:41:46,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586084120] [2020-11-28 07:41:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/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 07:41:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:46,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-11-28 07:41:46,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-11-28 07:41:46,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:46,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-28 07:41:46,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142990512] [2020-11-28 07:41:46,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:46,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:46,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:46,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:46,631 INFO L87 Difference]: Start difference. First operand 1139 states and 1359 transitions. Second operand 3 states. [2020-11-28 07:41:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:47,104 INFO L93 Difference]: Finished difference Result 2561 states and 3082 transitions. [2020-11-28 07:41:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:47,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2020-11-28 07:41:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:47,113 INFO L225 Difference]: With dead ends: 2561 [2020-11-28 07:41:47,113 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:41:47,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:41:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1281. [2020-11-28 07:41:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-28 07:41:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1510 transitions. [2020-11-28 07:41:47,153 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1510 transitions. Word has length 194 [2020-11-28 07:41:47,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:47,154 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1510 transitions. [2020-11-28 07:41:47,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:47,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1510 transitions. [2020-11-28 07:41:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-28 07:41:47,158 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:47,158 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:47,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-28 07:41:47,384 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash 15734310, now seen corresponding path program 1 times [2020-11-28 07:41:47,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:47,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679392677] [2020-11-28 07:41:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 124 proven. 67 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:41:47,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679392677] [2020-11-28 07:41:47,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170852052] [2020-11-28 07:41:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:47,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:47,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-11-28 07:41:47,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-11-28 07:41:47,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:47,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-28 07:41:47,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754573484] [2020-11-28 07:41:47,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:47,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:47,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:47,927 INFO L87 Difference]: Start difference. First operand 1281 states and 1510 transitions. Second operand 3 states. [2020-11-28 07:41:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:48,351 INFO L93 Difference]: Finished difference Result 2845 states and 3377 transitions. [2020-11-28 07:41:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:48,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2020-11-28 07:41:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:48,360 INFO L225 Difference]: With dead ends: 2845 [2020-11-28 07:41:48,360 INFO L226 Difference]: Without dead ends: 1565 [2020-11-28 07:41:48,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 393 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2020-11-28 07:41:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1423. [2020-11-28 07:41:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1423 states. [2020-11-28 07:41:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1670 transitions. [2020-11-28 07:41:48,397 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1670 transitions. Word has length 197 [2020-11-28 07:41:48,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:48,397 INFO L481 AbstractCegarLoop]: Abstraction has 1423 states and 1670 transitions. [2020-11-28 07:41:48,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1670 transitions. [2020-11-28 07:41:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-11-28 07:41:48,402 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:48,402 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:48,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:48,627 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:48,628 INFO L82 PathProgramCache]: Analyzing trace with hash 413833490, now seen corresponding path program 1 times [2020-11-28 07:41:48,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:48,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885611688] [2020-11-28 07:41:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 143 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-11-28 07:41:48,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885611688] [2020-11-28 07:41:48,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619478343] [2020-11-28 07:41:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:49,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:49,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-28 07:41:49,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-28 07:41:49,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:49,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-28 07:41:49,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159733788] [2020-11-28 07:41:49,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:49,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:49,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:49,238 INFO L87 Difference]: Start difference. First operand 1423 states and 1670 transitions. Second operand 3 states. [2020-11-28 07:41:49,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:49,645 INFO L93 Difference]: Finished difference Result 2772 states and 3209 transitions. [2020-11-28 07:41:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:49,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-11-28 07:41:49,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:49,646 INFO L225 Difference]: With dead ends: 2772 [2020-11-28 07:41:49,646 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:41:49,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:41:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:41:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:41:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:41:49,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 216 [2020-11-28 07:41:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:49,655 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:41:49,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:41:49,655 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:41:49,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 07:41:49,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:41:50,381 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-11-28 07:41:50,723 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-11-28 07:41:50,726 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:41:50,726 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:41:50,726 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:41:50,726 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:41:50,726 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:41:50,726 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:41:50,726 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:41:50,727 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:41:50,728 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:41:50,729 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:41:50,729 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:41:50,729 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:41:50,729 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:41:50,729 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:41:50,730 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (<= 14 ~a8~0)) (.cse2 (= ~a21~0 1)) (.cse4 (= ~a12~0 8)) (.cse8 (<= ~a16~0 5)) (.cse6 (= ~a17~0 1)) (.cse3 (= ~a16~0 6)) (.cse5 (not (= ~a7~0 1))) (.cse7 (<= ~a16~0 4)) (.cse1 (= ~a20~0 1)) (.cse9 (<= ~a21~0 0))) (or (and .cse0 .cse1) (and .cse2 .cse3 .cse4 .cse1 .cse5 .cse6) (and .cse7 .cse5) (and .cse0 .cse8) (and .cse2 .cse4 (= ~a8~0 13) .cse1 (= ~a16~0 4) .cse6) (and .cse7 .cse9 .cse6) (and .cse8 .cse9 .cse1 .cse6) (and .cse3 .cse1 .cse9) (and .cse3 .cse5 (<= 15 ~a8~0)) (and .cse7 .cse1 .cse9))) [2020-11-28 07:41:50,730 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:41:50,730 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:41:50,730 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:41:50,730 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:41:50,730 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:41:50,730 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:41:50,730 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:41:50,730 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:41:50,731 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:41:50,731 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:41:50,731 INFO L274 CegarLoopResult]: For program point L488-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:41:50,731 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:41:50,731 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:41:50,731 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:41:50,731 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:41:50,731 INFO L274 CegarLoopResult]: For program point L491-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:41:50,731 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:41:50,731 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:41:50,731 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:41:50,732 INFO L274 CegarLoopResult]: For program point L492(line 492) no Hoare annotation was computed. [2020-11-28 07:41:50,732 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:41:50,732 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:41:50,732 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:41:50,732 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:41:50,732 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:41:50,732 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:41:50,734 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (<= 14 ~a8~0)) (.cse2 (= ~a21~0 1)) (.cse4 (= ~a12~0 8)) (.cse8 (<= ~a16~0 5)) (.cse6 (= ~a17~0 1)) (.cse3 (= ~a16~0 6)) (.cse5 (not (= ~a7~0 1))) (.cse7 (<= ~a16~0 4)) (.cse1 (= ~a20~0 1)) (.cse9 (<= ~a21~0 0))) (or (and .cse0 .cse1) (and .cse2 .cse3 .cse4 .cse1 .cse5 .cse6) (and .cse7 .cse5) (and .cse0 .cse8) (and .cse2 .cse4 (= ~a8~0 13) .cse1 (= ~a16~0 4) .cse6) (and .cse7 .cse9 .cse6) (and .cse8 .cse9 .cse1 .cse6) (and .cse3 .cse1 .cse9) (and .cse3 .cse5 (<= 15 ~a8~0)) (and .cse7 .cse1 .cse9))) [2020-11-28 07:41:50,734 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:41:50,734 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:41:50,734 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:41:50,734 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:41:50,734 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:41:50,734 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:41:50,734 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:41:50,734 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:41:50,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:50 BoogieIcfgContainer [2020-11-28 07:41:50,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:50,757 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:50,757 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:50,757 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:50,758 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:38" (3/4) ... [2020-11-28 07:41:50,761 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:41:50,794 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-28 07:41:50,796 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:41:50,797 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:41:50,799 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:41:50,926 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3e7bef93-dedf-4a4e-ba55-227f99c9a390/bin/utaipan/witness.graphml [2020-11-28 07:41:50,927 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:50,928 INFO L168 Benchmark]: Toolchain (without parser) took 15384.10 ms. Allocated memory was 90.2 MB in the beginning and 331.4 MB in the end (delta: 241.2 MB). Free memory was 58.1 MB in the beginning and 182.0 MB in the end (delta: -123.9 MB). Peak memory consumption was 116.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:50,928 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory was 46.5 MB in the beginning and 46.4 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:50,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.72 ms. Allocated memory is still 90.2 MB. Free memory was 57.9 MB in the beginning and 50.8 MB in the end (delta: 7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:50,929 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.98 ms. Allocated memory is still 90.2 MB. Free memory was 50.8 MB in the beginning and 45.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:50,929 INFO L168 Benchmark]: Boogie Preprocessor took 60.96 ms. Allocated memory is still 90.2 MB. Free memory was 45.0 MB in the beginning and 40.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:50,930 INFO L168 Benchmark]: RCFGBuilder took 2140.12 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 40.4 MB in the beginning and 53.5 MB in the end (delta: -13.1 MB). Peak memory consumption was 38.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:50,930 INFO L168 Benchmark]: TraceAbstraction took 12254.98 ms. Allocated memory was 119.5 MB in the beginning and 331.4 MB in the end (delta: 211.8 MB). Free memory was 52.4 MB in the beginning and 197.7 MB in the end (delta: -145.3 MB). Peak memory consumption was 158.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:50,931 INFO L168 Benchmark]: Witness Printer took 169.66 ms. Allocated memory is still 331.4 MB. Free memory was 197.7 MB in the beginning and 182.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:50,933 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory was 46.5 MB in the beginning and 46.4 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 662.72 ms. Allocated memory is still 90.2 MB. Free memory was 57.9 MB in the beginning and 50.8 MB in the end (delta: 7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 88.98 ms. Allocated memory is still 90.2 MB. Free memory was 50.8 MB in the beginning and 45.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.96 ms. Allocated memory is still 90.2 MB. Free memory was 45.0 MB in the beginning and 40.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2140.12 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 40.4 MB in the beginning and 53.5 MB in the end (delta: -13.1 MB). Peak memory consumption was 38.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12254.98 ms. Allocated memory was 119.5 MB in the beginning and 331.4 MB in the end (delta: 211.8 MB). Free memory was 52.4 MB in the beginning and 197.7 MB in the end (delta: -145.3 MB). Peak memory consumption was 158.9 MB. Max. memory is 16.1 GB. * Witness Printer took 169.66 ms. Allocated memory is still 331.4 MB. Free memory was 197.7 MB in the beginning and 182.0 MB in the end (delta: 15.7 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: (((((((((14 <= a8 && a20 == 1) || (((((a21 == 1 && a16 == 6) && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (a16 <= 4 && !(a7 == 1))) || (14 <= a8 && a16 <= 5)) || (((((a21 == 1 && a12 == 8) && a8 == 13) && a20 == 1) && a16 == 4) && a17 == 1)) || ((a16 <= 4 && a21 <= 0) && a17 == 1)) || (((a16 <= 5 && a21 <= 0) && a20 == 1) && a17 == 1)) || ((a16 == 6 && a20 == 1) && a21 <= 0)) || ((a16 == 6 && !(a7 == 1)) && 15 <= a8)) || ((a16 <= 4 && a20 == 1) && a21 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((((14 <= a8 && a20 == 1) || (((((a21 == 1 && a16 == 6) && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (a16 <= 4 && !(a7 == 1))) || (14 <= a8 && a16 <= 5)) || (((((a21 == 1 && a12 == 8) && a8 == 13) && a20 == 1) && a16 == 4) && a17 == 1)) || ((a16 <= 4 && a21 <= 0) && a17 == 1)) || (((a16 <= 5 && a21 <= 0) && a20 == 1) && a17 == 1)) || ((a16 == 6 && a20 == 1) && a21 <= 0)) || ((a16 == 6 && !(a7 == 1)) && 15 <= a8)) || ((a16 <= 4 && a20 == 1) && a21 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.3s, OverallIterations: 12, TraceHistogramMax: 5, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 598 SDtfs, 1033 SDslu, 59 SDs, 0 SdLazy, 2949 SolverSat, 738 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1250 GetRequests, 1222 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1423occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 923 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 47 NumberOfFragments, 233 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2148 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 434 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 2126 NumberOfCodeBlocks, 2126 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2715 ConstructedInterpolants, 0 QuantifiedInterpolants, 1697453 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1309 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 2286/2503 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...